PC Musician: XP Tweaks For Music

The Audio Tweaks That Work - And The Ones That Don't!

Published in SOS September 2006
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Technique : PC Musician

Windows XP works better for audio than any other Windows OS so far, but musicians still seek those ultimate go-faster tricks, so this month we bring you a guide to those that are worth doing and those that are worth avoiding.

Martin Walker

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In this split personality screenshot, will the left-hand or the right-hand Windows setup run faster? Or will it not make any difference at all with a modern PC? Read on to find out...
In this split personality screenshot, will the left-hand or the right-hand Windows setup run faster? Or will it not make any difference at all with a modern PC? Read on to find out...

Unlike previous versions of Microsoft's Windows, Windows XP works pretty well straight out of the box with audio applications, and I only recommend three essential adjustments. Nevertheless, musicians still regularly ask me for a comprehensive list of 'go-faster' tweaks, and look elsewhere when I don't offer one, determined to make their PCs run faster by fiddling 'under the bonnet'.

You'll certainly be able to find lots of web sites offering Windows performance tweaks, many written for mainstream users and a few specifically for musicians, yet many of the tweaks they offer will result in no measurable improvement in audio performance, and some may make your PC unstable or even prevent it from booting up.

Nevertheless, many musicians are obviously still convinced that XP will benefit from such snake oil, and since I prefer not to have to send SOS readers and forum users elsewhere for advice, I decided to write this feature, which will explain in some detail the tweaks that work for musicians and why they do, as well as covering the ones that are unlikely to make any difference — including those that are potentially dangerous unless you really know what you're doing.

Some Windows History

It's not hard to see why musicians search for tweaks for Windows XP — after all, its predecessors (including Windows 95, 98, ME and 2000) often needed serious tweaking before audio applications would run smoothly with them. This was largely because most mainstream applications, such as those for word processing, accounts and Internet browsing, generally involve a burst of CPU activity followed by some idle time while the user considers what to do next, so it made the most sense for Windows to react as fast as it could to user input, but hang on until the idle times before updating files on the hard drive and so on. By contrast, musicians require from their PC almost continuous streaming of audio data, coupled with almost continuous CPU calculations for real-time plug-in effects and virtual instruments. In other words, mainstream applications focus on user input, while audio applications place far more emphasis on background tasks.

By the time Windows XP was released, the 'multimedia' PC market was far more important to Microsoft, partly since PC games had become so much more popular and sophisticated, and partly because many businesses were perfectly happy with Windows NT or 2000. So it was important that XP be capable of delivering smooth 3D graphics, background music and sound effects. Obviously, these enhanced capabilities benefited the musician.

Essential Tweaks

Only a few basic changes are needed to ensure smooth audio performance with XP, so let's discuss them first.

Change Processor Scheduling to 'Background Services'

Navigate to the Advanced page of the System applet. Click on the Performance Settings button, select its Advanced tab and click on 'Background Services' for Processor Scheduling (see top pair of screens).

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This is one of the few essential Windows XP tweaks, since it benefits the performance of ASIO drivers, which run as background tasks.
This is one of the few essential Windows XP tweaks, since it benefits the performance of ASIO drivers, which run as background tasks.

For anyone using ASIO drivers (and nowadays that includes just about every PC musician), this is the most essential tweak of all, because ASIO drivers run as background services in Windows. Music software and hardware developers Steinberg rely on this setting to ensure low latency without dropouts, and you may be able to run your audio interface at a significantly lower latency after this tweak.

Switch Off Power Schemes

In the Power Options applet, choose the 'Always On' power scheme. Change the settings for monitor and hard disk turn off and System standby to 'Never', so that your PC doesn't unexpectedly conk out during song playback (see screens below).

The wrong setting here can cripple the processing performance of many modern PCs, because of over-clever power schemes that throttle your processor to a slower clock speed to keep it cool and, in the case of laptops, prolong battery life. In theory, such throttling schemes should let your CPU clock speed ramp up smoothly on demand, but in practice there's a short time lag before this happens, sufficient to result in audio interruptions and, therefore, clicks and pops. The only safe way to prevent this happening is to make sure your processor always runs at its top speed.

I mentioned this tweak only a couple of months ago in my 'Overcoming Overload' feature (see SOS July 2006), but make no apologies for including it again here, as so many musicians struggle on with poor audio performance because their processor is running at a fraction of its top speed. By the way, the 'Always On' setting should ensure maximum CPU speed at all times (even when you unplug the mains PSU and run on internal batteries), but you should double-check this on the General page of the System applet, where the current clock speed is displayed (see screenshot on previous page). If it's not what you expect, choose a different power scheme and check again. Also make sure you've installed the latest throttling drivers for your PC, since the intricacies of power schemes can vary a little from model to model.

Disable System Sounds

Select the 'No Sounds' scheme on the Sounds tab of the Sounds and Audio Devices applet.

The bleeps, clicks, and other sounds that Windows uses by default to accompany such events as startup, log on and log off, new emails and the like can be helpful, especially for newcomers, but there's a good reason for musicians to disable them: most of the WAV files that Microsoft and other developers provide for such sounds have 22kHz sample rates. What now happens depends on the design of your soundcard and its drivers. My Echo 1820M seems immune, but if a 22kHz system sound cuts in when my Echo Mia card is playing back a 44.1kHz project through its ASIO drivers in Cubase SX, the Cubase audio files suddenly jump an octave higher and run at double speed, while soft synth outputs become extremely juddery. The Cubase engine has to be manually reset to cure these problems. Other musicians have reported songs dropping to half speed, or playback stopping altogether or suffering timing problems.

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Always check on the General page of the System applet that your processor is running at its maximum clock speed (here my 1.4GHz Pentium-M laptop processor has been throttled down to just 598MHz). If not, choosing the 'Always On' Power scheme should ensure this on most PCs.
Always check on the General page of the System applet that your processor is running at its maximum clock speed (here my 1.4GHz Pentium-M laptop processor has been throttled down to just 598MHz). If not, choosing the 'Always On' Power scheme should ensure this on most PCs.

Unfortunately, even if you select the 'No Sounds' scheme, whenever you choose a new graphic Theme the system sounds annoyingly return to the Windows default sound scheme. In addition, a few applications ignore the 'No Sounds' scheme altogether and continue to force their own system sounds to use your interface. Examples include some Local Area Network (LAN) cards, spyware utilities and the Firefox web browser's Find function. To prevent this from happening, you can try using the 'Do Not Map Through Soundcard' option. Under the Hardware tab of 'Sounds and Audio Devices', select your audio interface from the list of devices, click on the Properties button, then on the Properties tab of the resulting pop-up window, and then finally on the Property button of this audio device. You'll see a 'Do not map through this device' tick box, which you should tick. On my systems, this makes no difference at all, but it may work for you.

However, if you really want to get rid of System sounds once and for all, it's quicker and more thorough to navigate to the Audio tab of 'Sounds and Audio Devices' and set the Default device for sound playback to something other than your ASIO audio interface, such as an integral motherboard sound chip. If you really must hear system sounds, you can connect the system audio output to some speakers, but I've diverted mine to my SW1000XG soundcard, which is now only used for its MIDI synth and doesn't have its audio outputs connected to anything, so I never hear system sounds from any source.

The only side-effect of this tweak is that other basic Windows audio applications, such as Media Player, will also have their outputs diverted, but you can override that, if you wish to, using the Options page to point to a specific audio device. The result of all this one-off effort? You'll never again hear a system sound unless you want to, and your main audio interface will be forever immune from Windows' interference.

Useful Tweaks

Some experts maintain that once you've turned off the system sounds, checked your Power scheme and set Processor Scheduling to Background Services, you don't need to tweak anything else. However, in my opinion, there are still a few things that are well worth doing.

Disable Taskbar Auto-hide

Right-click on a blank area of the taskbar. Choose 'Properties', and un-tick the box labelled 'Auto-hide the Taskbar' (above left).

Although you lose a little screen space by leaving the Taskbar permanently on display, your audio will no longer be interrupted each time the Taskbar is hidden or reappears.

Turn Off System Restore on all drives

Tick this box from the System Restore tab in the System applet.

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Disabling the Taskbar's Auto-hide function will prevent your audio from glitching every time the bar is hidden or re-displayed.
Disabling the Taskbar's Auto-hide function will prevent your audio from glitching every time the bar is hidden or re-displayed.

By default, Windows XP runs 'behind the scenes', monitoring changes to your setup, including the installation of new drivers and software, so that if your machine develops a problem you can roll back to a previously saved restore point. However, musicians generally don't want the unpredictability of this extra overhead. Most of us prefer to use disk imaging software, such as Norton's Ghost, to save an accurate image of our entire music partition, at a time of our choosing.

Turn Off Automatic Updates

Select this radio button from the Automatic Updates tab in the System applet if your music PC isn't Internet-enabled. If it is Internet-enabled, instead select the 'Notify me but don't automatically download or install them' option. If you hear of a particular update file that will improve audio performance, you can still download and install it manually.

Disable Hibernation

From the Power Options applet, select the Hibernation page and un-tick the box labelled 'Enable hibernation'.

To enter this power-saving state, Windows saves the entire contents of your system RAM to a file on your hard drive, so that it can later restore your PC to exactly the same state. In the case of many modern music PCs fitted with 2GB RAM, this could take some time to save and restore. Hibernation can be handy, particularly on a laptop, but can also sometimes cause problems when USB and Firewire devices don't wake up properly before your sequencer, making it crash and require a complete and lengthy power down and reboot. So if you still want to attempt to use it, beware of these points.

Disable Fast User Switching

From the User Accounts applet, click on 'Select the way users log on or off'. Un-tick the 'Use Fast User Switching' box and then 'Apply Options'. This will ensure that if you have multiple users logging on and off your PC, they will be forced to close down their applications before they log off, so that there are none still running in the background and consuming system resources when you log on and start your audio ones.

Set Menu Speed to 'Maximum'

You can do this with a Registry tweak, but the safest and easiest way is using Microsoft's TweakUI utility (see screen above). Click on the Mouse setting in the left-hand pane. Pull the Menu Speed slider to its fastest setting and click the OK button. Then all cascading menus on Start menus and inside applications will appear instantly, rather than after an annoying delay.

Installing Windows XP
There are still people enquiring on the SOS Forum about whether they should buy Windows XP Home or the more expensive Professional version. The simple answer is that nearly all musicians will find Home perfectly adequate, since it supports a single dual-core processor. Only if your PC has more than one physical processor package will you definitely require the Professional version. The only other Professional-only feature that a few might want to consider is Remote Desktop, which lets you remotely control another PC as if it's in front of you. This feature is used by some specialist music retailers, including Carillon, to interrogate a customer's machine for fault-finding purposes.
As for the installation itself, there are still web sites recommending that you install Windows XP in Standard mode, but, as I explained in some depth in PC Notes February 2006, this is outmoded advice. Just leave it alone during the install and carry out the three essential tweaks I cover in the main text of this article.
Marginal Tweaks

Many tweaks are now a matter of user preference, since they make little or no difference to the performance of modern PCs, while others are simply to make your life a little simpler. Here are the main ones, along with some guidelines to help you make up your own mind whether to implement them or not.

Minimise Visual Effects

System applet, Advanced Tab, Performance Settings button, Visual Effects page, select 'Adjust for best performance'.

This will disable a whole clutch of graphic bells and whistles, the most important of which are the various animations — exploding windows when minimising and maximising, fading and sliding menus, buttons and boxes. These all rely on your computer's processor for the entire duration of their moves, and can therefore tip your PC over the edge when its CPU overhead is already near 100 percent running plug-ins and soft synths. I find the various animations annoying anyway, and I'm glad to see the back of them, although their overhead is arguably so tiny with modern processors that this tweak is largely optional.

However, 'Adjust for best performance' also disables various other features that are rather more useful and yet impose microscopic overheads. Some musicians still prefer the rectangular Windows Classic look, but you can reinstate the XP look, with its soft-sculpted windows and buttons with rounded corners, by switching to the 'Custom' button on the Visual Effects page and ticking the 'Use visual styles on windows and buttons' option.

While you're there, it's certainly also worth ticking the 'Smooth edges of screen fonts' option (which offers a considerable boost to on-screen legibility, without compromising performance), and 'Show window contents while dragging' (which makes re-aligning the multiple windows in modern sequencer applications a lot easier).

Remove Desktop Background Image

Select the Desktop page of Display applet and select '(None)' for the Background wallpaper setting.

In days gone by, this could reduce graphic overhead, but nowadays it's marginal, so whether you have a blank desktop or one with a pretty picture on it is rather up to you. Since the image is loaded into the RAM of your graphics card you won't waste any system RAM using a fancy image, but I still prefer the uncluttered look of a blank desktop, and when I'm making music my sequencer and other music applications fill my screen, so the desktop is nearly always invisible anyway. I do, however, choose a memorable colour for the desktops of each of my various Windows multi-boot partitions (green for General, mauve for Music, and red for Review) from the drop-down menu on the same page. Otherwise, it's easy to forget which partition you're currently running.

Disable Screensaver

To permanently disable the screensaver, just open the Display applet, navigate to its Screensaver page and select '(None)'.

It's not really necessary to disable screensavers nowadays, since even when they're running their processing overhead is tiny compared to the power available from a modern CPU, and before they kick in they consume no overhead at all. Nevertheless, since ASIO drivers run as background tasks, playing back a long song is regarded as 'no user activity' and will allow a screensaver to cut in unexpectedly. If you simply want to avoid this annoyance, just increase the 'Wait' time to a more suitable value.

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Making cascading menus appear instantly by setting this TweakUI slider to its fastest setting is not an essential tweak, but it certainly makes my Windows XP experience a lot more pleasurable!
Making cascading menus appear instantly by setting this TweakUI slider to its fastest setting is not an essential tweak, but it certainly makes my Windows XP experience a lot more pleasurable!

I recently adopted a third approach that takes a tiny bit of one-off effort to set up, but lets me start my chosen screensaver on demand. I find this invaluable when working on in-progress mixes, because replacing the visual clutter of the sequencer with something more relaxing enables me to concentrate on listening and more easily notice where changes are needed.

To do this, you first choose a screensaver from the drop-down list and adjust its settings for a restful display, using the Preview button. Click the Apply button so that these settings 'take', and then choose the '(None)' setting, as before. Next, use the Windows Search function to find the various screensaver files, by entering '*.scr' into the 'all or part of the filename' box. Then right-click on your choice and select the 'Create Shortcut' option. This will let you create a screensaver shortcut on the desktop, which you can launch at any time by using the Windows-D key-command and then double-clicking on the shortcut.

Disable Internet Synchronise Time

Navigate to the Internet Time page of the Date and Time applet and un-tick the option labelled 'Automatically synchronise with an Internet time server'.

Many people don't have any idea that their real-time system clock is, by default, synchronised to an Internet time server once a week, but it's a handy way to keep it accurate — assuming that you periodically connect your PC to the Internet, that is. If your music PC remains separate from the virus-ridden world of the Internet you might as well disable this function, as it won't work anyway.

Ignore Driver Signing

On the Hardware page of the System applet, click the Driver Signing button and select 'Ignore — Install the software anyway and don't ask for any approval'. Few audio developers pay Microsoft for the privilege of getting their products Windows Logo Tested, so this tweak will bypass all those annoying 'are you sure?' messages each time you install new software.

Startup and Recovery

In the Advanced page of the System applet, click on the Startup and Recovery Settings button, and under the System Failure section un-tick the box marked 'Automatically Restart'. If you do ever experience a system crash, this will prevent Windows from immediately rebooting. You'll then get a chance to read the on-screen information about the error, which may reference a particular system file, such as an audio interface driver, to help you track down the cause of the crash.

Disable Error Reporting

In the advanced page of the System applet, select the Advanced page, click on its 'Error Reporting' button and select the radio button labelled 'Disable error reporting'. In the event of an application fault, this will prevent your PC attempting to send a report to Microsoft.

Recommended Non-Windows Tweaks
Ironically, in their search for ever more obscure Windows XP tweaks that don't produce any measurable improvements, many musicians neglect very obvious system settings that may result in very significant benefits. Here are the main ones to check:
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If your hard drives have, for some reason, dropped from their normal DMA mode down to PIO mode, their performance will plummet.
If your hard drives have, for some reason, dropped from their normal DMA mode down to PIO mode, their performance will plummet.
Check hard drive DMA settings: I described in detail how to do this in SOS July 2006, so won't repeat myself here, except to remind you that if Windows has, for some reason, neglected to set your IDE drives to the most appropriate DMA mode you may only manage seven simultaneous audio tracks instead of 70!
Reduce the sample rate: While running your projects at a 96kHz sample rate seems to be all the rage, your PC will be able to run less than half the number of plug-ins and soft synths that it can run at 44.1kHz, and less than a quarter as many if you're using 192kHz. Don't assume that a higher sample rate sounds better with your particular audio interface and sounds. Listen carefully for yourself, and if you can't hear a difference stick with 24-bit/44.1kHz, or perhaps 24-bit/88.2kHz, if this is an option.
Increase latency: Running your sequencer with a 1.5ms latency is handy when monitoring vocals via headphones, but a 6ms setting is more sensible during most recording work and will result in a significant reduction in CPU overhead. During mixdown, a setting of 12ms or above may let you run double the number of plug-ins and soft synths.
Disable unused sequencer I/O: Each input and output requires periodic polling, which is wasted effort if nothing is connected to them and will be particularly noticeable at low latency values. For instance, on my PC, enabling 16 ins and 16 outs with 2ms latency on my Emu 1820M interface results in a 10 percent CPU meter reading in Cubase SX, even before loading a project, while stereo in/out at 6ms barely registers at all.
Disable Superflous Tasks: Ideally, you should never connect your music PC to the Internet, so that you won't need to install anti-virus or spyware scanning utilities, firewalls and all the other paraphernalia that prevents outsider interference. However, if you simply must have Internet access, before making music you should disable any such software that scans files in the background, along with other superflous background tasks, since this will definitely impinge on sequencer performance, as well as consuming system RAM.
Pointless Tweaks

As mentioned in the introduction, there are quite a few tweaks recommended out there on the Internet that either do nothing at all or can seriously impair the performance of your music PC. For instance, ignore any references to vcache settings and conservative swapfile settings, since these don't apply to Windows XP.

Instructions to reduce the Color Quality of your display from the Highest (32-bit) setting down to 16-bit were only valid years ago, when more primitive graphics cards took more resources with higher bit settings. Nowadays everything tends to be optimised for the 32-bit settings, so you will reduce the performance of both hardware and software if this is changed. Also ignore any suggestions to reduce the hardware acceleration of your graphics card, since this will result in your CPU having to perform those duties instead.

Services are small applications, installed either by Windows XP or other software, that carry out a host of background tasks. Each one on your PC is either set by default to Automatic, so that it loads every time you boot up; set to Manual, so that it only gets started when needed; or Disabled. Disabling various Windows Services in an effort to further streamline your PC's audio performance is, in my opinion, pointless. Moreover, if you don't know exactly what you're doing your system can become unstable or even refuse to boot up afterwards. It may not be obvious from the description of a particular Service how it can affect the smooth running of audio applications. For instance, the Portable Media Serial Number Service, described as 'retrieving the serial number of any portable media player connected to this computer' will disable any dongles you have plugged in and therefore prevent many music applications from running.

Your requirements may also change over time. If, for instance, you've stripped Services down to the absolute minimum by disabling those that relate to networks, you'll have problems if you ever install the excellent FX Teleport utility that uses the network to ferry MIDI and audio data to other PCs.

Despite all the above, so many musicians seem keen to delve into the intricacies of the Service list that I decided to carry out a practical experiment by disabling all the Services I possibly could on my own music PC and then measuring any improvements I could find. Initially, the Windows Task Manager told me that as soon as I reached the desktop Windows was using 205.6MB of my system RAM, and that the only CPU overhead was the two percent taken by Task Manager itself.

After very carefully disabling every possible Service that a non-networked music-only PC wouldn't need (on my PC, some 46 Services in all), I rebooted. The total CPU overhead was still exactly the same, at two percent, but the system RAM consumption was now down to 197.6MB: a negligible improvement of just 8MB. To double-check for any audio improvement, I ran a song that had previously been struggling at the limits of both my CPU and RAM, even with an audio interface latency of 20ms, and found no improvement at all. I rest my case! 


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