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Re: Yoshimi on the Raspberry Pi

Postby Eddy Deegan » Fri Oct 11, 2019 12:57 pm

Folderol wrote:... through a sudo-balanced lead

At first I was "eh, wot?"

Folderol wrote:Yes. I am that Linux nut.

And now I'm "Yes. Yes you are." :lol:
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Re: Yoshimi on the Raspberry Pi

Postby Folderol » Fri Oct 11, 2019 1:43 pm

Opps! My excuse is I wrote that before lunch :tongue:

@Elf: That's exactly what I'm hoping to achieve.

@BJG145: Thanks, it should be an interesting challenge.
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Re: Yoshimi on the Raspberry Pi

Postby The Elf » Fri Oct 11, 2019 2:08 pm

Folderol wrote:@Elf: That's exactly what I'm hoping to achieve.
Then you now have my attention! :thumbup:
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Re: Yoshimi on the Raspberry Pi

Postby Folderol » Tue Oct 15, 2019 12:32 pm

To put it mildly, I am a little less than delighted with Amazon.

The monitor I ordered was quoted as due for delivery today. Well I just checked on-line and this has now magically changed to between the 26th, and 5th November - right in the middle of the time I'll be in Germany :madas:

I do have another HDMI capable monitor, but it's a bit inconvenient to say the least. It's hooked up to this computer.
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Re: Yoshimi on the Raspberry Pi

Postby Wonks » Tue Oct 15, 2019 12:41 pm

Cancel and get another one.
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Re: Yoshimi on the Raspberry Pi

Postby Folderol » Tue Oct 15, 2019 4:25 pm

It is supposedly on its way, and too late to cancel - makes me wonder were it's coming from!

The situation is annoying but not a total disaster. I can keep on refining this on the Pi 3B. In particular the physical layout in the box is not completely decided, and some notes in a document folder might be a good idea :tongue:
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Re: Yoshimi on the Raspberry Pi

Postby Wonks » Tue Oct 15, 2019 4:38 pm

Just contact their customer service team. The contract was placed based on the stated quick delivery (always take a screen shot with Amazon!). Moan and raise hell!
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Re: Yoshimi on the Raspberry Pi

Postby Folderol » Wed Oct 16, 2019 8:49 pm

Quite honesty, on this occasion it's not worth the hassle. The fact it's so long suggests it's coming from some 'distant' country, so Amazon won't make it an easy ride. I know the corner shop takes deliveries for locals sometimes, so I can always ask if they will accept this for me.

Besides, it's given me more time to plan layouts etc. (also knocking about a tenner off the component price). The icing on the cake, is that I've discovered a better base system than Raspbian so that even the 3B is now giving very presentable results. Added to which startup is now down to ~15 seconds and shutdown ~7 seconds :)
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Re: Yoshimi on the Raspberry Pi

Postby Eddy Deegan » Thu Oct 17, 2019 12:04 pm

Folderol wrote:Besides, it's given me more time to plan layouts etc. (also knocking about a tenner off the component price). The icing on the cake, is that I've discovered a better base system than Raspbian so that even the 3B is now giving very presentable results. Added to which startup is now down to ~15 seconds and shutdown ~7 seconds :)

:clap: :clap: :clap:
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Re: Yoshimi on the Raspberry Pi

Postby Folderol » Tue Oct 29, 2019 2:14 pm

Progress Report:

After a short panic when Amazon said the monitor was delivered last Friday, it actually arrived about half an hour ago. I could at last make tentative tests on the Pi 4. The monitor looks, and feels quite solid and robust.

Being somewhat impatient I used the same card as I'd been running on the Pi 3 and was first a bit miffed that the desktop image didn't appear. However, I manged to work round that and got Yoshimi started and displayed. With the size of screen the main window fits well and the text is very clear albeit small. Other windows also seem to be well proportioned.

Next, the performance. I started out cautiously at first with a few lightweight sounds. Everything was fine, so I went for some of the bigger ones. Still no issues. Took a deep breath and loaded up the most complex and processor hungry patch of the lot. Breezed through it, to the extent I threw caution to the wind and and started playing arpeggios. It's only on a mini keyboard at the moment, so I was limited to a degree. However, I'm frankly astonished at the performance. I couldn't detect a single Xrun, dropped, or stuck note.

I had it on a 5V bench PSU (fed via the GPIO pins)) and the current consumption remained well below 1A, mostly about 700mA.

I'll order the case and other bits now, and get to work on a full build. I'll also make a dedicated P4 image with all the goodies.

P.S.
One thing that's clear, is that you absolutely must not unplug the USB audio module while running. It will crash most resoundingly, likely requiring a power-off reset, and the attendant risk of SD card corruption.
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Re: Yoshimi on the Raspberry Pi

Postby Eddy Deegan » Tue Oct 29, 2019 3:30 pm

Folderol wrote:Progress Report:

Next, the performance. I started out cautiously at first with a few lightweight sounds. Everything was fine, so I went for some of the bigger ones. Still no issues. Took a deep breath and loaded up the most complex and processor hungry patch of the lot. Breezed through it, to the extent I threw caution to the wind and and started playing arpeggios. It's only on a mini keyboard at the moment, so I was limited to a degree. However, I'm frankly astonished at the performance. I couldn't detect a single Xrun, dropped, or stuck note.

I had it on a 5V bench PSU (fed via the GPIO pins)) and the current consumption remained well below 1A, mostly about 700mA.

I'll order the case and other bits now, and get to work on a full build. I'll also make a dedicated P4 image with all the goodies.

Sounds like great progress Will! :clap:

I'm seriously looking forward to getting my hands on this as much as I'm looking forward to getting 'em on the Novation Summit and I will create a demo video of the Yoshimi appliance too.
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Re: Yoshimi on the Raspberry Pi

Postby The Elf » Tue Oct 29, 2019 4:35 pm

I'm starting to take an interest, especially since I have other potential uses for a Pi, partly as a virtual Commodore 64 and partly as a network aid. I quite fancy one of the cases that doubles as a mini-screen.

I'm a total novice to Pi and Linux, so any advice would be gratefully received.
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Re: Yoshimi on the Raspberry Pi

Postby Folderol » Wed Oct 30, 2019 4:44 pm

Parts have arrived, and I can fix the internal layout right here.

The view is from above, with the dotted items upside down above the others. As you can see there is not a lot of space. This isn't (yet) fixed in stone, so if potential users think something is definitely wrong, now's the time to shout.

The box is pretty much an exact fit under the monitor, so the DC and HDMI leads are only 1/2M long.

The PSU I'm using has class 2 medical certification (surprisingly cheaper than the alternatives). The mains side will be earthed, but, apart from a 2.2M bleed resistor shunted by a 470pF cap, the chassis - and therefore all the connections - will float, so no ground loops.
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Re: Yoshimi on the Raspberry Pi

Postby Martin Walker » Thu Oct 31, 2019 5:16 pm

All sounds good to me Will, but like you I'm surprised that the class 2 medical certification PSU was cheaper :headbang:


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Re: Yoshimi on the Raspberry Pi

Postby Folderol » Thu Oct 31, 2019 9:47 pm

Slight change of plan :roll:

Two of the PSU mounting holes have pads connected to the mains side Earth. This means floating the chassis would require insulated fittings, and extra space that's in short demand. However, the way everything fits together there is an alternative.

The Pi itself does have insulated mounting holes. Also, the Audio out is on a fully insulated socket, and the USB and Ethernet sockets have clear space round them, so I can hard earth the case, but still float the Pi and all the attachments.

Of course when I started this I completely forgot that I no longer have access to any machine tools, so I'm having to rapidly re-learn old skills :headbang:
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