John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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INTRODUCTION
There seems to have been a dearth of quality professional
recorders in the “upper middle” (£2k to £5k) range in recent times. Plenty at the cheap
end, a few around the thousand mark – and then almost nothing until you get to the
expensive 8 and 10 track machines in the £8k+ bracket.
So far Sound Devices
seem to have had this area to themselves – until now that is.
Enter the new
NAGRA VI.
Nagra have always had a reputation for quality and
reliability, right from the very beginning. Back in 1952 a student from Switzerland,
Stefan Kudelski, won the very first International Amateur Recording Contest (IARC)* using a wind-up
tape recorder he had made himself. This so impressed Swiss Radio that they immediately
asked him to make half a dozen recorders for them. This he did and this was the start of
the Nagra company (Nagra is Polish for “will record”) – specialising in top quality
portable recorders which were the industry standard for many decades; the NAGRA VI is the
latest to wear this famous badge and is the first portable multi-track from Nagra.
Making a portable recorder is always a difficult mix of design decisions – having
to balance the need for a small size, yet having all the facilities demanded and with
controls that are easy to use that are not cramped and fiddly. Having a bright display
that can be read in the brightest sunlight, yet needing a long recording time on batteries
(preferably a full day) without having to recharge. Quite a balancing act.
Nagra took the decision that sound quality and ease of use was more important than
trying to make the recorder as small as possible, so it is a little larger than first
expected – but all the controls are well laid out and it is pretty instinctive to use.
The Nagra VI is a six-channel recorder, recording at 16 or 24 bits with a sample
rate selectable between 44.1, 48, 88.2 and 96 kHz (with 0.1% pull up/down). It has
timecode as standard which runs from a “Stratum III” TXCO crystal, aged to maintain
stability, guaranteed to have an overall stability better than ±4.6ppm over a period of 15
years throughout a temperature range of -20° to +70°. The drift due to temperature change
is less than 0.28ppm. This is the most accurate crystal ever used on a NAGRA recorder – so
if timecode drifts, it won’t be the NAGRA. The NAGRA VI is fully compatible with iXML. The
internal hard drive is a 120GB drive, selected for its quality and reliability. There is
also a Compact Flash bay with no limit to the size of card used. Although you can
record directly to the card, its main use would be to back-up the recordings from the hard
drive.
The NAGRA VI has four very high quality microphone pre-amplifiers
which can be switched for condenser and dynamic mics. (selecting “dynamic” brings in a
high quality transformer, optimised for dynamic microphones), six line inputs and two AES3
inputs – all selectable.
LAYOUT
Front Panel
– this contains an ultra-bright 3½” TFT display that is used to show the status as well as
the levels and menus of the recorder. It was chosen for its ability to be “sunlight
readable” and perform well over a wide temperature range and have an extremely wide
viewing angle. This display shows (see Dia.1) along the top: Date & Time, Drive used
& Folder name, remaining time of the drive and battery status. The left side of the
display shows the “play” status (stop, play, record, etc.), index number, “tape” counter,
project name, take number, time code, user bits and file type (eg: 24/48k 6ch mono). The
right side of the display shows the 6-channel modulometers; underneath them is the
recording status of the six channels: REC on or off, SouRCe (Mic., Line, digital, off,
etc.), 48V phantom on or off, LIMiter on or off, FILter on or off and PHAse reverse on or
off. A “star” button dims the display when the light is poor and you don’t need it so
bright. There is also a “night” display mode that turns all the white text blue so the
display is not too bright and annoying when recording at night. There are various other
display modes for the display including one that hides all the recording status displays
except the channel record status so you get a larger modulometer display (“Cinema” mode),
“Music” mode is the same but hides TC and metadata as well; “Meters” mode only shows the
modulometers in a large easy-to-read format.
To the right of the display are three user
definable buttons, the light “star” key and the menu
navigation keys. Then come the
main input level controls for the first four channels (channels 5 and 6 can be a mixdown
of the first four, or direct line-in, or AES3 in without level control). Underneath these
are the marker keys and forward / rewind keys. Above them are switches for loudspeaker
on/off, reference tone on/off and the slate mic.. These three keys are protected by a
small hood to minimise the risk of accidental use.
On the far right of the
front panel is the standard NAGRA rotary main function selector (off, test, record, stop
and play), this has a red line across that is hidden when the selector is in the “off”
position. There is a small hole in the red line; this is the internal slate mic. and it’s
protected and hidden in the “off” position. Next to this are the monitor level control and
a standard ¼” headphones jack socket.
Above these are two rows of six switches
– the top row selects the monitoring “pan”: left, centre or right – the bottom row selects
the monitoring status: off, on and solo (solo is spring loaded and switches back to “on”
when you remove your finger).
Left Side – this contains an XLR-4 DC
input socket and two small Hirose 12V DC output sockets (for powering radiomic. receivers
or a Neumann AES42/AES3 digital microphone adaptor, for example). There is a standard
5-pole LEMO connector for timecode. There are six XLR-3 sockets; the first four are
selectable mic or line and the last two are selectable AES3 or line.
Right Side – this contains the CF card
slot, a standard ¼” headphones jack socket (wired in parallel to the one on the front
panel), a start/stop remote control socket, USB sockets (one for future connection to an
external USB device – such as a remote keyboard – and the other for downloading the files
to a PC), a 9-pin D-connector (two AES3 outputs, MIDI and wordclock in and out), an XLR-3
for AES3 out and two XLR-3 for line-out left and right.
Screwed to each side is a T-shaped handle.
This makes the recorder easy to carry and also
protects the front panel from damage.
These are easy to reposition as “feet” to tilt the recorder at an easy-to-use angle for
tabletop mounting. When used with the Nagra case, they are removed completely and the
shoulder-strap screws in, in their place. The bottom only has four rubber feet and the
top only has the single monitoring loudspeaker; this can optionally be set to only operate
in “play” mode so there is no risk of it coming on while
recording.
The
back has the connection sockets for the screw-on battery pack.
BATTERY
The NAGRA VI comes supplied with a 4.6Ah, 10.8V Lithium-ion
battery pack that can power the recorder for about four or five hours of continuous
operation. There is an optional 13.8Ah pack that will give about twelve to fifteen hours
of continuous operation. The smaller capacity pack takes about two hours to recharge and
the larger about five hours. Personally I prefer the larger pack as it will safely work
all day and charge overnight. The supplied mains power supply unit plugs into the battery
pack via a 3-pin LEMO socket and will charge the battery and power the recorder at the
same time. The XLR-4 on the recorder is mainly for powering the machine from a car battery
or for powering it when no battery is connected. Personally I prefer powering from the
mains via the battery, so the recorder will continue seamlessly to work in the case of
mains (or generator) failure. The back of the battery pack has four sturdy feet to protect
it if you stand it on the ground. Also on the back are two status LEDs: one showing when
on external power and the other is the charging status light (on when charging and off
when the pack is fully charged).
IN USE
To test
out the NAGRA VI, I decided to use it in over-the-shoulder mode. As Nagra GB had run out
of the optional carrying case I borrowed one from Richmond Film Services
(thanks Nigel) who already have a couple of NAGRA VI in their hire stock. Armed with an
ORTF pair of my new Sennheiser MKH 8040 cardioid microphones I set off for the Whitley Bay International Jazz
Festival in sunny Newcastle. This annual festival has top quality performers from all
over the world and was an ideal place to test out the NAGRA VI in awkward conditions. I
was recording, sitting in the audience, with the recorder at my feet and the microphones
on a foldable tripod stand with the capsules on remote cables sitting in Rycote INV-2
shockmounts.
Setting levels was very easy as there is a little “fuel gauge”
display which shows when you move a level control and tells you the exact level set – so
it’s easy to get a stereo pair to exactly the same setting. On this first firmware version
there is no stereo ganging control, which I found a bit awkward – but, as I expected,
Nagra were already working on this and full selectable level control ganging is now on all
new NAGRA VIs (and can easily be added as a firmware upgrade to earlier machines – go to
www.nagraaudio.com
and then: Pro – Support – Nagra VI and follow the instructions in the Owners Manual) –
this means that once the levels are set everything can easily be adjusted with a single
knob.
I found the menu very easy and instinctive to use. Instead of scrolling
through loads and loads of options, the menu is laid out in chapters and sub-chapters.
This means that it is quick and easy to find what you need and changing anything while in
the field is pretty simple and hassle-free.
I set it up to record only on
channels 1 and 2 (stereo). I selected condenser mic. and entered the sensitivity of the
mic. to get the correct level. I turned on 48V phantom power and also the limiter (as it
was a live recording with an audience all around); the limiter is easy to link to operate
in stereo mode, this is selectable channels 1+2 and/or 3+4. As I was recording inside with
people all around me, I found it best to set the display to “night” mode and the light
level to “dim” – this was still plenty bright enough to see. I also set the display to
“cinema” mode while recording to give the extra long modulometer display. You can set the
display defaults for “stand-by” and “record”; so I set the “Default” screen for “stand-by”
which shows all the setting options and “Cinema” mode for “record” which gives the longer
modulometers. My wish for a new firmware upgrade is to add a “playback” option. Playback
uses the “stand-by” option but with a blank at the bottom as there are no record options
showing in playback – so my wish is to either default to longer modulometers here and fill
the blank area, or to allow a “playback” setting option.
You can set the
recording to be poly files or mono files. For the first day I had the settings in “poly”
mode so I was recording a stereo file. The NAGRA VI is set so that when the 2GB file limit
is reached it automatically starts a second file and seamlessly continues recording. So,
on the first day, as I was recording at 24/96, I had one recording split into one file of
1:02:02 duration and one of 0:16:28 – these were easily identified as the take number
remains the same, though the file number increased by one.
On the second day
I set the NAGRA VI to record mono files as this doubles the recording time before the file
splits (stereo recording) – these are also easily identified as the files have the suffix
_1 and _2 (up to _6 if you are recording all six channels).
The monitoring on
the NAGRA VI is excellent and the headphone amplifier seems high quality and quiet. I was
monitoring on low (70-Ohms) impedance and very efficient (120dB) Sennheiser HD 25-1
headphones (almost the industry standard nowadays). I found that I had to have the
headphones volume set at maximum to get the level I needed (in fact, on occasions I would
have liked it a bit louder), with headphones of less efficiency I feel it would have been
too quiet. I queried this with Nagra as it is possible I was doing something silly – but
this was the only slightly negative thing I found. Nagra listened and investigated this –
and the latest version of the NAGRA VI now has the option to increase the monitor level by
+6dB or +12dB (earlier versions can easily be updated in firmware as I described
earlier).
I recorded several sessions of the Bratislava Hot Serenaders (probably the finest 20s Jazz Orchestra in
the world) from back in the audience and a session of an international mix of musicians
(who came together for this event only) from the front. Other than wishing I could
throttle the people who insisted on talking through the performance, everything came out
very well and both groups asked me for copy CDs of the sessions. I also recorded a
wonderful off-the-cuff jamming session into the early hours of the morning with several of
the best musicians at the festival.
I found the battery seemed to live up to the claims – I
recorded about two hours of 24/96 with two microphones running on phantom power and the
battery read about half way when I finished. The second day I topped the battery up at the
meal break and recorded over three hours with the battery still above the red. I’m not
sure how far into the red is safe (as it’s a Li-ion battery), but would say that 4 hours
with a pair of phantom powered mics. seems fine in reality (that’s equivalent to 12 hours
recording with phantom power on with the large battery).
I must say that the
recorder remained cool throughout all this time, it did not get warm at all; so no power
was being wasted in making heat, so maximising battery time and showing that Nagra were
not driving components too hard – this bodes well for a machine that needs to be reliable
over many years of hard use.
In all, I had almost 8 hours of recording – this
download to PC (320GB external laptop drive) in less than an hour. Now all I have to do is
to import the files into Sequoia (you can use the program of your choice, of course) for
editing and CD burning.
I downloaded direct from the NAGRA VI to the laptop
by using a USB cable directly from the
recorder. If I wished, I could just as easily
have copied the files from the hard drive to a Compact Flash card(s) in the recorder
itself and then used the CF cards to download to the computer. CF cards have plummeted in
price over the last year or two – an 8GB SanDisc Ultra II is now under £40 and the
equivalent 16GB card is under £100 – I paid about £200 for the same 8GB card about 18
months ago!
CONCLUSIONS
I did not find
over-the-shoulder use too arduous (the NAGRA VI weighs in at 3kg without batteries and, I
guess, the standard battery pack adds only about 0.5kg to this). Yes, a smaller machine
would have been easier, but you would sacrifice the easy-to-use layout of the Nagra with
knobs that are still easy to manipulate in gloved fingers; so I think I prefer the Nagra
option. On a trolley or on a table in a fixed situation the larger size comes into its own
and is the much better option.
This is a very high quality recorder with
analogue circuits up to Nagra’s top of the range standard; with mic. pre-amps that equal
or better anything Nagra has ever done and a proper switch-over for dynamic microphones
means that there are absolutely no compromises on this front.
I found it easy
and instinctive to use, the menu easy to navigate (made even easier with familiarity) and
the set-up was very easy. The limiter worked well and efficiently with no obvious
artefacts and I was happy to leave it switched in all the time to take care of unexpected
peaks.
I was very happy with the NAGRA VI and my only reservation about the
headphones amplifier has now already been fixed.
The big question – does it
perform well and pass my perfectionist standards to the extent that I would actually fork
out the money (Scottish ancestor and all) and buy one? The answer has to be “Yes”; I
really liked this machine – I don’t compromise on sound quality and neither does the NAGRA
VI, coupled with the instinctive layout and ease of use – no contest.
And yes
– I *did* actually order one – the “burgundy red” version with the high capacity battery
and Nagra GB’s Carrying Case (though the picture below shows the Nagra original case).
The NAGRA VI retails at £3,999 +VAT in the UK and
comes complete with the standard 4.6Ah battery pack and a universal (100-240V AC)
switch-mode power supply unit which plugs into the battery pack for charging and powering
the machine. There is a choice of colour for the front panel: “slate grey” (pictured at
the top), “midnight blue”, or “burgundy red” (pictured above) – the choice is yours. The
larger 13.8Ah battery pack retails for £ 514 +VAT and the optional case is £ 135 +VAT.
Nagra GB
3U Long Spring
Porters Wood
St. Albans
Herts.
AL3 6EN
Tel: 01727-81-00-02
Website: www.nagraaudio.com
You
can see more on the NAGRA VI on Nagra’s website HERE and there is another “First Look” review of the NAGRA VI
on THIS
PAGE.
* The IARC is still going
strong and the 57th contest will be held in Saabrücken, in Germany, in October this year.
The reviewer, John Willett, was last year elected as President of the International Federation of
Soundhunters that runs the IARC and this year’s contest will be the first one with him
at the helm.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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ken long
Joined: 21/01/08
Posts: 2026
Loc: The Orient, East London
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Great report John. Thanks for sharing. I've been looking into one of these for a while
now and your report just got me interested again. Might call Richmond for a test drive
soon .
Quote:
wishing I could throttle the people who insisted on talking through the performance
Ha! 
ken
-------------------- I'm All Ears.
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-----
active member
Joined: 29/05/03
Posts: 5988
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Very nice review John.
Quote John
Willett:

But in the picture its looking suspiciously like an accordion. Careful where you leave
it or someone might throw it on the fire!
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Quote Wonkey Wabbit:
Very nice
review John.
Quote John
Willett:

But in the picture its looking suspiciously like an accordion. Careful where you leave
it or someone might throw it on the fire!
Thanks - but
to start the fire they will have to find some bagpipes first. 
But the case I am getting is the UK version and is a different colour - so I
should be safe (I hope).
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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ghellquist
Joined: 09/09/04
Posts: 607
Loc: Stockolm, Sweden
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Oops. Guess it is time for another bank loan.
Great review.
/Gunnar
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Jeraldo
Joined: 10/09/05
Posts: 1597
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I enjoyed reading this! Liked the attention to detail, in both the product and the
review.
My only comment on the product is the powering scheme. You mentioned
you preferred to operate on the larger battery pack rather than to risk mains failure. My
question/comment is: Is the Nagra not able to seamlessly migrate from one power source to
another in the middle of operation?
I prefer working on batteries, too, as it's
just a lot easier.
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Quote Jeraldo:
I enjoyed reading
this! Liked the attention to detail, in both the product and the review.
My
only comment on the product is the powering scheme. You mentioned you preferred to operate
on the larger battery pack rather than to risk mains failure. My question/comment is: Is
the Nagra not able to seamlessly migrate from one power source to another in the middle of
operation?
I prefer working on batteries, too, as it's just a lot easier.
Thanks Jeraldo.
My
comment on the large (actually high capacity - the battery pack is the same size as the
standard one) battery referred to the fact that it can run for a good 12 hours and will
work for a complete day rather than having to change or charge in the middle.
The supplied PSU plugs into the battery and will run the recorder and charge the battery
at the same time. I like this way of working after reading from someone (I'm not sure if
it was here or Gearslutz) who was using an FR-2 without batteries and someone switched off
the mains before it wrote the TOC and he lost the complete recording.
Recording
on the Nagra VI via the battery means that if someone does pull the power, or there is a
power cut, you don't lose anything.
You *can* run the Nagra VI without battery
via the XLR-4, but if you lose power everything stops. As I did not have this connector I
did not see what would happen if this occurred - I would think that you could seamlessly
screw on a battery and pull the plug and it would carry on working with no glitch, though.
Being a Nagra I cannot envisage anything else.
My own unit will not arrive
until late next week, so I can't check now.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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Jeraldo
Joined: 10/09/05
Posts: 1597
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Thanks, John.
I'd encourage you to update this thread in the coming weeks or
months as you live with it and post a little note for the update in the other forum as
you've done with this.
Swiss francs and a Nagra seem like good places for
Americans to put their cash and evaporating market shares....
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Will do.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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I have been having some interesting conversations about digital clocking.
As
with most (if not all) location recorders, the NAGRA VI needs to be set to be clocked to
the incoming digital signal - normally by setting either input AES-1 or AES-2 to clock the
Nagra.
If more than one external digital unit is recorded, they need to be
clocked together externally and one used to clock the NAGRA VI.
This means that
you are relying on the clock accuracy of the incoming signal.
However - the
NAGRA VI has an exceptionally good clock.
I queried with Nagra as to the
possibility of the NAGRA VI being used to clock the system instead of relying on external
equipment - and the answer is YES. 
To do this - take the "clock out" from the sub-D connector and
use this to clock the external units - leave the NAGRA VI set as "Master" (If you then set
the AES-1 or -2 to clock to, you would get a "loop" - this must be avoided) and all will
be fine.
This means that everything is set to the very accurate and stable
clock of the NAGRA VI.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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Jeraldo
Joined: 10/09/05
Posts: 1597
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And I was just musing about the ability to use the Neumann D or Sennheiser digi module
mic's.
Being lazy and not wanting to go find this, have you used your Neumann D
mic's with this and how does this all go in terms of interface-what do you need/not need?
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Quote Jeraldo:
And I was just
musing about the ability to use the Neumann D or Sennheiser digi module mic's.
Being lazy and not wanting to go find this, have you used your Neumann D mic's with this
and how does this all go in terms of interface-what do you need/not need?
My own machine will not arrive until later
this week.
Recording classical, normally my KM-Ds will go in to AES-2 on the
Nagra VI as an AES3 signal via the Neumann DMI2 (mains powered) interface.
WIth
the Sennheiser MKH 8000 series - I can use two MKH 8040 heads as an ORTF pair via a
Y-cable into the MZD 8000 AES42 unit. This can be fed into the AES input of the Nagra (in
stereo) via the Neumann Connection Kit (the "video" version of the connection kit has a DC
lead with Hirose connector which will take power directly from the Nagra VI).
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Quote Jeraldo:
And I was just
musing about the ability to use the Neumann D or Sennheiser digi module mic's.
Being lazy and not wanting to go find this, have you used your Neumann D mic's with this
and how does this all go in terms of interface-what do you need/not need?
Update - My machine arrived a few weeks ago
and I have been testing it with digital mics.
Using the Neumann connection kit,
an AES42 digital microphone can be plugged directly into an AES3 input of the Nagra VI (if
you get the special "Video Connection Kit" version, it comes with a Hirose connector that
plugs directly into the 12V DC output socket of the Nagra VI with no messing about - this
is the one I have).
As AES42 microphones are digital devices they need to be
clocked - so you can only use a single KM-D into the Nagra VI as the connection kit just
phantom powers the mic. and passes the digits straight through. You can, of course, also
use a Schoeps AES42 mic. with the Neumann Connection Kit - again, it is just the one mic.
you can use.
However - the Sennheiser MZD 8000 is a dual-channel device. So
you can connect two MKH 8000 microphone heads to a single MZD 8000 via a Y-cable and - via
a single MZD 8000 and single Neumann Connection Kit - record stereo directly into an AES3
input of the Nagra VI.
Running more digital mics needs external AES42 units
like the Neumann DMI-2 or DMI-8; or the RME 842 unit; unfortunately all these are mains
powered, but this is not a problem if you are doing music recording in a building with
mains power.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Firmware version 1.30 for the Nagra VI was released in mid October and improves the
operation and functionality of the recorder.
This is downloadable from the
Nagra website.
I understand that there is likely to be another update (or two)
this year as Nagra are continually fine-tuning and adding more funtionality.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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ghellquist
Joined: 09/09/04
Posts: 607
Loc: Stockolm, Sweden
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Quote John Willett:
As AES42
microphones are digital devices they need to be clocked - so you can only use a single
KM-D into the Nagra VI as the connection kit just phantom powers the mic. and passes the
digits straight through. You can, of course, also use a Schoeps AES42 mic. with the
Neumann Connection Kit - again, it is just the one mic. you can use.
Running
more digital mics needs external AES42 units like the Neumann DMI-2 or DMI-8; or the RME
842 unit; unfortunately all these are mains powered, but this is not a problem if you are
doing music recording in a building with mains power.
Update: A totally different box, the Sound Devices 788T does
support power to external AES mics and does do resampling, so you could run up to 4 pairs
of separate digital mics. Of course this is not exactly the same as synchronizing the
clocks of the mics.
Currently, the main argument against that box is that it
runs maximum 48k sampling speed (connected digital mics can run up to 192kHz but will be
downsampled). As the hardware (A/D and so on) supports up to 192k, we might possible,
eventually, just perhaps, get a software update going up to higher sampling rates. And I
could perhaps win a bit of money on the lottery to be able to afford my recording
hobby.
// Gunnar
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Hugh Robjohns
SOS Technical Editor
Joined: 25/07/03
Posts: 11357
Loc: Worcestershire
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Quote John Willett:
This means
that everything is set to the very accurate and stable clock of the NAGRA VI.
Not
necessarily. The aspect of digits that is critical in terms of clocking is at the
converters (A-D and D-A). Transferring digital data from an A-D into the recorder doesn't
require a particularly stable clock at all.
As long as the each chunk of
sample data is loaded correctly into the recorder the precise timing is irrelevant because
at this point time has little meaning. The audio has been chopped up into discontinuous
chunks.
Most A-D converter clocks run from internal crystals, and these are
nowadays very accurate and very stable -- it is the ideal way of designing a clock
circuit.
However, if you choose to clock a converter from an external source,
then in mot cases that crystal clock is ignored and a new clock derived from the external
input. This is a very non-trivial process. The incoming clock will be jittery simply
because it has passed down a cable -- regardless of how wonderful the source clock might
have been. A PLL circuit will be required to remove that jitter and 'average out' the
clock. The problem here is that a really good PLL is very slow to lock, and even the best
often fail to remove all jitter components.
In the early days of digital audio
some devices really did have pretty ropey internal clocks, and external clocking sometimes
offered an audible quality improvement. But I think that largely died out in the late 90s
when designers finally mastered the art of building good internal clocks.
Of
course, sometimes you still have to use external clocks -- such as when you need to
synchronise two or more separate A-D converters -- but in general, the best performance
these days is achieved when using an A-D's internal clock.
One last point: When
you need to clock two or more converters together you have a quandary to solve. Do you
clock all the A-Ds woth a distributed feed from an external master clock source? Or do you
use the internal clock of a 'master' A-D and distribute that to all the others?
Both will work, of course. The first ensures all A-Ds work to the same quality, but
relies on their PLLs and none may work to their highest capabilities. The second approach
allows the master A-D to work to the best it can, while the others follow on hoping their
PLLS remove any jitter.
Hugh
-------------------- Technical Editor, Sound On Sound
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Quote John Willett:
Firmware
version 1.30 for the Nagra VI was released in mid October and improves the operation and
functionality of the recorder.
This is downloadable from the Nagra
website.
Version 1.4 was
released just before Christmas and a small bug-fix v1.41 was released a few days ago.
This improves the functionality of the Nagra VI and makes things much nicer.
I have been told that a few more improvements will be coming along in v1.5
shortly.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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ghellquist
Joined: 09/09/04
Posts: 607
Loc: Stockolm, Sweden
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As it was mentioned as a major decision point, I return to the Sound Devices 788T here. It
now supports 96k sampling rate. According to the manual, some reductions are made in
functionality, limiters are not in effect is one effect.
// Gunnar
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Although the 788T is a nice machine (especially since it added AES42 and 96kHz) I have
found that the more I use my Nagra VI the more I love it.
It is absolutely
superb and I have absolutely no regrets in buying it.
Mine now has software
v1.42, it will run all day on one charge (12-15 hours) and Nagra's ADC / DAC and mic. pres
are really up with the very best at any price. This and the superb ergonomics still
convince me.
Although it was the lack of 96kHz on the 788T started me on the
Nagra route, I am not disappointed in the least and would probably still get the Nagra VI
if I had to make the decision now.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Update - Nagra VI software is now up to v1.51 and gets better with every upgrade. 
It can now copy all recordings onto Compact Flash as it records
the next take for fast and easy back-up.
New versions now come with feet that
raise it to s good viewing angle and the case is now delivered a s standard.

The blue version is also now available:-
Also - the USB socket is now enabled so you can
attach a keyboard, USB hard drive, DVD burner, etc... 
I am *very* happy I bought one.
Interesting to note
that 60% are the red version (like mine) and 20% each for grey and blue.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Just to let you know that firmware version 2.00 for the NAGRA VI was posted on the Nagra
website today.
This recorder really does get better and better with every
update and I'm extremely happy with my purchase.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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arrangeit
new member
Joined: 14/11/02
Posts: 8
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Hello John,
A few questions re the preamps...I am familiar with Sytek,
Broadhurst BG1 and Earthworks 1022 transformerless pres, so these would be my terms of
reference...
What other pres (transformerless) would you compare these to? What is the gain range on the pre? Are the pres relatively quiet at high gain? The specs indicate that a transformer is utilized in the signal-path when the pre is set
to 'dynamic'. Curious if you've tried a dynamic (RE-20 for instance) or especially a
ribbon with this circuit?
As is obvious from my questions, I would be
considering this unit as a dual-use (live/studio) machine and am wondering if the fidelity
competes with the best studio gear.
Thanks in advance...
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John Willett
Circle Sound Services
Joined: 07/03/00
Posts: 11118
Loc: Oxfordshire UK
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Quote arrangeit:
Hello John,
A few questions re the preamps...I am familiar with Sytek, Broadhurst BG1 and
Earthworks 1022 transformerless pres, so these would be my terms of reference...
What other pres (transformerless) would you compare these to? What is the gain
range on the pre? Are the pres relatively quiet at high gain? The specs indicate
that a transformer is utilized in the signal-path when the pre is set to 'dynamic'.
Curious if you've tried a dynamic (RE-20 for instance) or especially a ribbon with this
circuit?
As is obvious from my questions, I would be considering this unit as a
dual-use (live/studio) machine and am wondering if the fidelity competes with the best
studio gear.
Thanks in advance...
The mic. pres aon the Nagra VI are one of the best available and
pretty well equal to the best esoteric mic. pres.
The same goes for the ADC and
DAC.
There is no need to get an external mic. pre for the Nagra VI - and it's
also internally adjustable to match your microphone's sensitivity.
---
As a further note - software v2.1 was made available for download recently, this further
improves the machine.
-------------------- John
President - Fédération Internationale des Chasseurs de Sons
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