Hi, there,
I just wanted to share my experience with various drivers tries and basic tweaks among all you can read in various forums.
If you don't want to read all the boring details of this long post just jump to the end
First here is my setup
- MOTU UltraLite MK3
- Asus P5BE+ board with a TI onboard IEE1394 chipset
- Intel Core 2 duo 2.4Ghz
- 2GB RAM
- Windows 7 32bits (RC1)
- Using Ableton Live 8, ASIO buffer 128 samples at 44.1 sample rate
I was experiencing 2 sort of issues:
- Audio drops under windows after a nasty high beep, usually happened when for example browsing a web page with several videos on it, audio dropped and I has to reload the page. Or if I restarted my computer, the FW card was still recognized but did not output any sound.
- THE clicks, pops, crackles and whizz thing using ASIO, that get worse when I turn the ASIO buffer down, and that are not related to CPU spikes.
The first one was sorted out by the latest MOTU drivers (3.7.37320) out in January. They are way more stable (I also had BSOD from time to times with previous drivers, no more here). So I highly recommend the upgrade.
The second one led me to this forum (and tons of others

I had these crackles and clicks when using Ableton Live, when playing around with clips (creating new ones or duplicating them on the fly), no need to have a complex set, just 2 or 3 drum part a bass and a lead with some effects, all Ableton internal instruments, a constant 20-30% CPU usage with a 128 Samples buffer (which gives me about 10ms latency in Live)
I also use Sound Forge to simply process single audio files, and I have the crackles when scrolling through the waveform and an audible click when jumping to another part of the file while playing. I describe this because I read many "clicks and pops" topics around, and the actual issue(s) were different.
So let's say Issue 1 = Ableton Live, Issue 2 = Sound forge scroll, Issue 3 = Sound forge click
So here is what I tried :
- MOTU driver upgrade : improved things a bit (maybe it's mor the overall impression of stability)
- Using a PCI firewire card, instead of onboard: No change, the onboard is a TI one so is ok, the PCI card has an Agere/LSI chip, and works exactly as good (or as bad

- Trying the usual optimisations ("background service" performance mode, disabling the onboard devices, and windows services etc ...): No change, which is in a way a good thing because it would be scary if in 2010, a PC cannot handle the slight overload of this.
- Tried the AVT drivers : Obviously worse, more clicks and crackles, but after changing the PCI latency in drivers setting to a high value, it was just a bit worse (not sure, but for sure not better)
- Tried to use the OHCI host controller LEGACY driver
When you change the driver manually you have 3 choices (don't ever ask why

, "OHCI host controller Texas Instrument", "OHCI host controller", and "OHCI host controller (Legacy)". The first one is the default one, AVT driver can switch back to windows driver and when it does it uses the second one (which was in my case equal (i.e. a bit worse, but not sure than default one

, and the third one seems better, I have no more clicks in sound forge (Issue 3 solved) when jumping to an audio file part, I still have some crackles in Ableton, but noticeably less (Issue 1 improved), scrolling in Sound Forge still crackles a bit less but still (Issue 2 not solved)
- Tried disabling all visual effects in Win 7 (Aero etc...)
This fixed Sound Forge scrolling issue (Issue 2), but did not change anything in Ableton Live ... So disabling it might help, depending what app you're using. Disabling all makes you jump back to Windows 95 era in terms of user experience, if you're having a dedicated DAW PC you don't care, but for a an all purpose machine it's really annoying ...
So to sum it up :
- Upgrade to 3.7.37320 drivers really helps on windows audio and improves crackling and poping a bit
- Use OHCI host controller LEGACY driver improves crackling and popping (but does not fully get rid of it)
- Disabling visual effect can improves things in some apps but not all, so you have to try.
- Third party drivers (AVT) did not improve anything in my case.
Looks like the only definitive solution is "Get a Mac", but at least if this post can help some to get things a bit better without blowing up your windows installation with complicated tweaks (All these were for me quick and easy to try, and easily reversible)
Have a nice day (or night)
Aleen