derZorn wrote:Hi,
after a number of problems with getting my 896hd to work (which actually was a defective FW port in the 896hd) I'm finally running a MOTU/WinXP system.
I'm really happy with it..... Mostly.
From time to time (seemingly random) I get a number of squeals and dropouts and was hoping to find the answer to my problem in the answers found in this thread.
Well, so far I'm out of luck - the SP1 drivers won't stay installed on my sys for example, but one thing that is obvious to me is that it's
not the unit that has problems, but the system.
Be sure to check your steps very carefully. I've updated Post #1, step [1.5] to include a link to the sp1 files. Inside you will find abou 6 files related to fw drivers. Do a search of your whole system for these files remove (DON'T delete) them by placing them on a CD or usb memory stick. Also be sure that all of your SP1.cab, SP2.cab and SP3.cab files are also removed onto a temporary storage device not connected to the system. If the system will immediately replace these files in one shot (even without a reboot it would seem). The SP2/SP3 FW drivers are most definitely a contributing cause to your symptoms. You are running a very similar system to me so it will work out in the end.
When I connect an USB-Stick to my onboard USB ports I can provoke the high pitched squeal every time.
I tried that with a number of different sticks and ports on my ASUS M2N-E with Nvidia 570Ultra chipset.
The squeal is there for like a second while the device gets detected, then stops.
Sometimes audio sounds somewhat distorted after that.
So maybe our problems don't lie with the FW but somewhere in the USB hub ?
(
Funny you mention this because I've recently noticed the same phenomenon. Generally it isn't good practice to connect/disconnect drives while there are any programs running. I do believe that this squeal/momentary interruption is attributed to the system's plug-and-play scanning of the device as it is connected. Naturally as the internal data bussing of the system is re-oriented all other data streams would experience a momentary lag. I don't think this is a bug... however it would obviously be something to improve on the Windows platform in the future.
Mark S wrote:anyone have a link to the SP1 drivers? Both my XP machines came with sp2. And I have not yet been able to find them on the net.
And why is there no fix from MOTU for this. SP2 has only been out since '03?
I've just updated the original post to include a link to the SP1 files that I used. It's in step [1.5]. And yes, this FW bus issue is the same problem that has been around since SP2 was launched. In all fairness there is nothing technically wrong with the MOTU drivers, and there's not much that MOTU could really do to incorporate a fix into their drivers since the fix would require registry and backdating of Windows XP drivers... Windows XP FINALLY needs to fix this FW bus speed issue. There are "hotfixes" available, but they only perform one of the two major steps cited in my first post.... thereby having no affect.
What MOTU SHOULD have done and STILL SHOULD do, is post up a formal fix on motu.com similar to what I have posted here (which happens to be partially based on RME's fix that they posted on their site
4 years ago. I've even sent this fix to them to review, but they got back to me a couple weeks later with a "we think you should contact tech support with your problem."

Before I came up with this fix for my system I was looking to sell off my MOTU's and go for something else, but nothing comes close at the same price-point.
For a long time this issue has been swept under the carpet because:
- the majority of consumers who use firewire use it for short bursts of data transfer (i.e. backup, extra storage) and wouldn't notice the affects (although they would technically be measureable
- the consumers who did notice the SP2 truncation of FW bus speed were those who used digital video cameras. They require a constant higher bandwidth data stream, so people had a few issues, and some of those were fixed with hotfixes.
- there aren't many people who use Windows XP machines with FW devices that require a very high bandwidth for continuous data streams. But we do. The majority of people who use FW devices for pro applications usually run MACs (where FW was born in the first place). You could own a Lamborghini, Ferrari, and Bugatti, but if you only every drive them at highway speeds then you'll never notice problems that occur as they are each respectively pushed hard.