MacPro distortion for Firewire Audio (duet, digi 002r)

Hi -
First off, thanks for reading. I'm at the end of my rope on this one.
For the last 2 years (since I moved from a G4 + digi 001 to an intel mac + 002r) I have been experiencing intermittent distortion issues where the audio distorts periodically, sometimes for just a second at a time, but eventually permanently.
The fix with the 002r was restarting PT. I assumed it was a digi problem, until I replaced the 002r with an Apogee Duet and STILL have the same problem, even after installing 10.5 clean and deleting all Digi drivers.
The fix with the Duet is to change the format in Audio MIDI setup from 44.1 to another setting (doesn't matter which). Apogee has told me this resets the firewire driver. It's better than restarting, but still ***** horribly. Their support has been somewhat helpful (definitely more than Digi's) but not pointed me in the right direction yet.
This happens in Logic, but also happens in the OS, for example if I'm playing a quicktime movie or listening to iTunes. the regular audio port has no issues.
This has been driving me crazy for 2 years. If anyone can help I would be eternally grateful.
Setup details:
MacPro 1,1 (dual xeon 2.66)
3 GB memory
2 fast drives (on serial-ATA, not daisy-chained on FW)
duet (plugged into rear FW port) (and had same problem with 002r)
OS X 10.5.5
Logic Studio (but had same problem with PT)
Native Instruments Guitar Rig + Kontakt (but had problem prior to installing these)
Thanks -
Michael
Message was edited by: mtumi

I think I may have found a solution on my own. posting to help others...
I happened upon this post that said they encountered problems with just the rear port of the mac pro. I switched to the front port and sure enough it seems for now at least to have gone away. hallelujah!
here is the post on the rear port being off
http://lists.apple.com/archives/Firewire/2006/Oct/msg00031.html

Similar Messages

Digital distortion on external firewire audio Edirol FA-101 and 10.4.11

Hi
Not sure if this is the right forum but I have an Edirol FA-101 external firewire audio unit and it seems like prior to installing 10.4.11 update for Tiger the audio was perfect. Now however I get a constant level of what sounds like digital distortion even without any audio sources playing out of my FA-101.. I saw the forum/support notes regarding audio problem with 10.4.10.. just wondered if anyone has similar experiences..the audio device does not have it's own drivers but uses the mac built in firewire audio support.
Thanks

that's what outputs 3 and 4 are there for. You can't control one stereo output to do two different things at the same time... it says in the edirol manual that the headphone jack outputs the same as output 1 and 2 from the back.
Therefore if you want a separate stereo output pair to connect your speakers to, you must use outputs 3 and 4.
Edirol didn't make the unit for the pc - actually the hardware was designed for the mac (hence it's core audio compatibility out of the box).
Edirol's fa-101 and fa-66 (which I own) are mac product which just happen to work on the pc thanks to the driver they had to write after the fact to support windows xp. Plug the unit into a pc without the driver and nothing happens. plug it into a mac running osx and it's automagically configured for low latency, highest performance, midi and audio in and out.
Have fun owning the best interface you can get for the mac for the money!

Using Firewire on a HP Laptop for multichannel audio recording

While firewire is stil the standard for realtime full duplex multichannel audiorecording (see also current interfaces at Steinberg, Focusrite etc) it seems impossible to buy anything portable besides an Apple laptop. Not because firewire is not available (although less and less!), but mainly because the only thrustworthy firewire-cards seems to have Texas Instruments chipsets. So we search for specs of chipsets on the firewirecard, buy that card to be sure that we will not have crackles, hickups and other distortions during recordingsessions. In fact we are not certain, until we tried the configuration. Because we don't know what to look for. In PC-world, nothing seems to be sure.
Tranferrates are expressed in amount of data within a cetrain period, usualy a second. It does not matter if a chipset is buffering during the transfer or has a tiny hickup. The only thing that matters is the amount of time needed for that amount of data. In realtime audio- and video we need a guaranteed bandwidth for every moment. Always. A stereo-audio-cd is already using 88,200 16bit 'events' a second, without the correctiondata. Recording is about much more. Is there something to read about guaranteed bandwith in specs of interfaces, drives or cards?
Don't underestimate the bandwidth needed here, this is not about some mp3-radiostreams of 64kb. This is about uncompressed audio, daisychaining firewire interfaces to 24 tracks full duplex for a nice amount, using 24 or 32 bits resolution and 192kHz sample rates are today's standards. Oh yes, and of course you play and record while listening to the other routed audio streams, using plugin-effects and plugin-soundsynthesis at the same time. Without any interruption.
Besides those who want to record complete live playing band at once, also smaller 1-8 pre-amp channel interfaces are using firewire or thunderbolt, like the Focusrite's Saffire Pro 14. It seems that USB is nice, but if you want to have the real stuff, like recording more channels with higher samplerates and just the better preamps, you'll have to go firewire or thunderbolt. There are USB-interfaces available, but they go up to 8 mic-channels max. It is still unclear how to get to 24 channels with USB by combining interfaces and using USB3. Also because this realtime data-transfer has to be processed by the CPU while using USB, which is also busy with complex reverb calculations and trying to keep the latency (difference in time between what you play and what your hear) as low as possible.
While the world is getting used to portable computers more and more, every day more (young) musicians are able to buy decent microphones and preamps, step by step building up there own homestudio. And while there are people recording with tablets already (although very limited), the laptopsellers seem not to have any clou that there is a need for something portable that can record with these firewire audiointerfaces.
Because spec-given firewire transfer-rates are no garantee that your realtime streaming transfer will be without problems, it would be very nice if HP could point us something like a laptop (serie) equipped with firewireports that we can trust and is able to transfer audio and video livestreams to our DAWs or DVWs.
Maybe HP laptops are already capable of doing this. We haven't got a clou, because we don't know what it is that we should look for besides the TI-chipset. If somebody at HP give us some info about this, it would be great.
- Are the HP laptops with firewire capable of recording with audiointerface up to a useful .. say 24 channels full duplex ? (you can daisychain firewire audio interfaces).
- If we are not sure, are there HP laptops with TI-chipsets? And that is always doing the job?
Dear HP; if you have a laptop that is capable of doing this, prepare for a run on these. Most people have to buy an Apple now, because they don't know better or there is no knowlegde available.
Firewire is still the standard in audiorecording. Check for example the interfaces on:
http://www.steinberg.net/
http://global.focusrite.com/

The external monitor will only work after windows boots. Before that step, an external monitor won't help. The entire recovery process will only use the dedicated laptop display (which is sadly broken).
I know when I recently reformatted my desktop, I hardly pressed more than a few different buttons (mostly Enter), so I was wondering if there is a set of keystrokes that I could hit to ensure a smooth reformat with the recovery DVDs I had created.

Firewire chain for external audio interface and hard drive

I use Logic Studio 8 on a Macbook Pro with a Presonus Firebox, an external Lacie Firewire hard drive for audio recording, and another Lacie Firewire drive for backups.
Is there a recommended chain order when chaining my Firewire devices together? I read somewhere on a ProTools forum that they recommend putting their Firewire audio interface Mbox2Pro at the end of the chain.
So right now I have Macbook Pro -> Backup Drive -> Audio Drive -> Presonus Firebox. I once had it in a different order with the audio drive first, but I found it was reading more slowly from/to the audio drive when it was in that order. I have no idea technologically why this would be the case.

I just found and joined this great forum. Following up on Ray's comments about his MacBook set-up, I have a similar MacBook 2ghz, 4mb ram, 9400 chipset, and am exploring getting into Logic Pro 8 and was wondering if my MacBook was underpowered, and whether I needed to step up right away to a MacBook Pro because of my lack of PCI slots for recording audio to an external eSATA drive.
I was encouraged to hear that the USB 2.0 connection for Ray's external WD 7200 hard drive has worked and improved things and his audio isn't getting choked and he is not getting the clicks and other problems.
I'm wondering if Ray or anyone else has any other tips on using a MacBook for Logic and for optimizing one's setup. And Ray, did you notice a point at which the clicks started? .. in terms of number of tracks? Or were they present from the outset? I'm wondering how many tracks you are running now on your system.
I might mention that I don't have an audio interface yet but was impressed with what I've read about the Apogee Duet. Any comments on interfaces and the Duet?
By the way, I'm just recording one instrument/one track at a time and perhaps occasionally two instruments at a time. And right now, my main purpose for getting into Logic is for editing and mixdown of pre-existing tracks that have already been created on a standalone hard-disc based DAW. If all goes well and if I like the whole Logic experience I'd expect to get a more powerful MacBook Pro or even a Mac Pro or whatever higher end iMac exists in the future.
To summarize, all I'm intending to do initially with the MacBook is:
1) transfer individual digital tracks from a standalone hard disc-based DAW into Logic for mixdown and mastering.
2) Record a few extra new tracks one at a time - probably not using any instrument plug-ins but relying on external synth/sampler/guitar sound sources ..in each song (maybe 3-4 tracks at most), and
3) apply standard effects like reverb and EQ and panning to the mix down and master songs, each song containing a of approx 25-40 tracks.
My basic question is, can a MacBook 2Ghz with firewire 400, 4gb memory and USB2.0 to external hard drive handle this or is it underpowered? Thanks.
Derek

Firewire Audio Static/Distorted

In the middle of a project today, during playback, audio through Firewire deck became static, distorted, too loud. Audio meters in FCP are fine, but meters on firewire deck are pegged. Tried other projects and they have same problem. Swapped firewire cable to no avail. Switched over to my MacbookPro but rest of my regular peripherals and played the same project without the problem... so it must be something in my MacPro Tower. If I set FCP to playback audio through computer, not firewire, it plays fine.
Ideas?

I've seen this issue on several IntelMac edit stations when FCP 6 was first released on through v6.0.2. Just to compare, the problem I've witnessed is that the Firewire audio out will suddenly be nothing but digital garbage; distorted, garbled, scratchy noise. Changing the audio routing to the internal speakers results in normal audio, but as soon as you change it back to Firewire (or Audio Follows Video), nothing but garbage again.
AFAIK, trashing preferences has always worked ... keep us informed on what you find out.
-DH

Playing DVDs in 5.1 With Firewire Audio Interface Connected for Logic Pro

This is exactly the same q as asked by plantwebguy in July 06, link
http://discussions.apple.com/message.jspa?messageID=2696970#2696970...
I'm struggling to get an answer on this anywhere... I have Logic Pro running 5.1 Surround Mixes on a g5, using a Metric Halo Mobile IO Firewire audio interface - its 6 analog outs are connected to a M Audio LX4 powered surround system. It all works great - until... the problem is when I need to listen to DVDs with 5.1 soundtracks (for reference), or even HD trailers (with 5.1 soundtracks). With the Mobile IO selected as audio interface, DVDs only play in stereo. I think this is because the 5.1 soundtrack is only output thru the optical out - but connecting the optical out to the Mobile IO and selecting 'Digital out' on the g5 brings silence.. Im told this is because the MIO's optical in wont decode 5.1. I'm interested to hear from anyone with a Pro Audio interface - like a MOTU etc - who needs to switch between mixing their own music in 5.1 and then listening to DVDs in 5.1.. I cant be the first, surely?
Plantwebguy said he solved his issue with VLC. Do we know if VLC willl decode 5.1 and then output it to the Interface via Firewire? I've searched the net for a Pro Audio interface with (1) 6 analog outs & mic inputs etc (2) firewire connection and (3) optical in that reads AC3/5.1 etc (rather than just ADAT).... nada. Sorry to be long-winded but I cant get a solution anywhere..
Thanks in advance
g5 dual 2.5 Mac OS X (10.3.9) Logic Pro/Mobile IO 2882 FW Interface/M Audio LX4

This is exactly the same q as asked by plantwebguy in July 06, link
http://discussions.apple.com/message.jspa?messageID=2696970#2696970...
I'm struggling to get an answer on this anywhere... I have Logic Pro running 5.1 Surround Mixes on a g5, using a Metric Halo Mobile IO Firewire audio interface - its 6 analog outs are connected to a M Audio LX4 powered surround system. It all works great - until... the problem is when I need to listen to DVDs with 5.1 soundtracks (for reference), or even HD trailers (with 5.1 soundtracks). With the Mobile IO selected as audio interface, DVDs only play in stereo. I think this is because the 5.1 soundtrack is only output thru the optical out - but connecting the optical out to the Mobile IO and selecting 'Digital out' on the g5 brings silence.. Im told this is because the MIO's optical in wont decode 5.1. I'm interested to hear from anyone with a Pro Audio interface - like a MOTU etc - who needs to switch between mixing their own music in 5.1 and then listening to DVDs in 5.1.. I cant be the first, surely?
Plantwebguy said he solved his issue with VLC. Do we know if VLC willl decode 5.1 and then output it to the Interface via Firewire? I've searched the net for a Pro Audio interface with (1) 6 analog outs & mic inputs etc (2) firewire connection and (3) optical in that reads AC3/5.1 etc (rather than just ADAT).... nada. Sorry to be long-winded but I cant get a solution anywhere..
Thanks in advance
g5 dual 2.5 Mac OS X (10.3.9) Logic Pro/Mobile IO 2882 FW Interface/M Audio LX4

I'm looking for a great sounding FireWire Audio/midi interface.....

Does anyone have experience with the
Mackie Onyx 400F FireWire Audio Interface and Logic 7 ?
I'm hoping to get the very best i can for around $700.
Some reviews i've read say that the sound is some of the best
around. (for the price) Namely, the mic pre.
I need simple but great/reliable midi... i simply need to send my midi controller into Logic, so the simple in/out seems fine for me.
Is it reliable and good with Logic ?

Hey man.
I've tested many of the mid range interfaces including the Onyx 400f. In terms of sound quality I would say the Onyx is the best and reprasents new standards in terms of audio quality at that price point. The pres smoke everything else i've tried (except outboard pres of course). The converters sound highly musical. I prefer them to the sound of higher specced units. BUT! Stability has been a major problem for this unit. Check the Mackie forums under Support on the Mackie website. Its full of horror stories. From high pitched whines, to clicks and pops to phantom power issues latency. Apparently some defective units were released.
I'm currently trying to get hold of one that works, cause I need that sound! But, it's not easy. I've hired two and both had issues, but sounded killer- dow! Anyway another problem is I don't think they have intel drivers yet.
Here are the ones I tested in my preffered order.
1. Onyx 400f
2. Metric Halo ULN-2
3. RME FF 400/800
4. Presonus firepod/ firebox
5. MOTU Traveler
Hope this helps. Cheers.

Lowest latency Firewire audio interface for Logic... which should I choose?

Hi Guys,
I'm about to replace my trusty Yamaha n12 with a dedicated firewire audio interface.
My main requirement is super-low latency for running BFD and other virtual instruments, along with monitoring through Logic directly sometimes (to add effects to vocals in real-time, etc).
I've narrowed down my choice (I think!!) to:
- RME Fireface 800
- Apogee Ensemble
- MOTU 896 Mk3
I have been told that the RME drivers are incredible, and hence it has the lowest latency.
I'd love to hear from other Logic users who own any of the above! What kind of latency do you get (round trip in ms)? What is the lowest buffer setting you can use?
Any downfalls or problems you've had with any of these interfaces?
Thanks heaps guys, can't wait to hear some opinions!
Cheers and thanks,
Mike

Thomjinx wrote:
If yeloop is using BFD, then direct monitoring isn't going to help him. That is for audio in.
Exactly.
FWIW, on MOTU Ultralites, I get a little (less than 1 ms) less latency with the Mk 1 rather than the Mk 3.
Perhaps the built-in DSP slows the Mk 3 down?
Interesting--thanks for the info (one more reason not to upgrade MOTU, frankly...)!
It is still 4.3 ms at 32 samples with the Mk 3. For MIDI controlled VIs, it would be less than that.
I think I measured 3.9ms with my Traveler mk2 at 44.1k with a 32 sample buffer. So, it's a bit faster than the mk3. At 96k I can use a 32 sample buffer to get 2.5ms latency, but I can't run BFD2 with a 32 sample buffer. Best I can do with BFD2 is a 64 sample buffer at 96k... 3.16ms.
But, you're exactly right, Thomjinx: with a VI, you won't hear that full amount of latency. Assuming the MIDI latency is negligible, the VI response time will be roughly 1/2 the full analog audio latency. (Logic reports both of the these figures--output latency and full roundtrip latency--if you click on the latency info in the Audio preferences. Be aware, though, that some devices report this information correctly, while others do not. For instance, with the Apogee and Metric Halo products I've used, the numbers reported by Logic are exactly correct, while with MOTU, the numbers shown in Logic are lower than reality: with a 64 buffer at 44.1k the Traveler mk2 indicates 4.3ms roundtrip latency with Logic, but I measured it as 5.6ms... so you may be misled if you try to use the latency values reported by Logic to compare products... in that regard, MOTU seems to cheat, while Apogee and Metric Halo follow the rules
-James

10.4.11 external firewire audio device noise/distortion

Hi
Subsequent to upgrading to 10.4.11 I now have persistent noise from my external firewire audio device. It's an Edirol FA-101 and worked perfectly in 10.4.10 and earlier. I tried replacing the firewire cable with no effect.
The FA-101 is a class compliane device so uses Apples built in firewire audio drivers.. has anyone else had firewire audio problems with 10.4.11?
Thanks
Mark

No I doubt it... FW can be strange sometimes.
Look in Sytem Profiler, if it says you don't have FW at all, then remove all power from the iMac, let it set a few hours to Drain down, plug back in everthing.
Or...
http://docs.info.apple.com/article.html?artnum=301733

FireWire Audio Heat Problem (Macbook Pro, Late 2008) VIDEO proof

http://www.youtube.com/watch?v=JYHnX3CGUoo
After a lot of hours of trying to figure out WHY my macbook pro heats up (a lot) when i connect my newly bought Apogee Duet firewire audio interface, i found out that actually what was happening is that there are CPU spikes of extremely short period (so short that Activity Monitor and iStat could not catch) constantly spiking the CPU frequency from 1596Mhz (Idle) to 2572Mhz (Maximum). Apart from the frequency spike there is also a VOLTAGE spike from 1.0v to 1.15.
I know that this is normal due to speedstep technologies and such BUT the rapid spiking and alterations of frequency and voltage ALWAYS happening when i have my Firewire audio plugged is not normal to me. There is nothing else running, everything's idle and i only plug the firewire interface.
Also this is not happening when i restrict OSX from loading AppleFWAudio.kext (either by deleting, moving, renaming it). I connect the firewire audio interface, the leds are illuminating but no heat problem (thats to show you that is not because the interface is self-powered)
Whats going on seems to be similar with the problems occurred after Mac Pro Audio Update to users that was using FW audio devices. They were hearing a sine noise coming from their macpro and propably that was because the same thing was happening. Constant spikes of voltage to the CPU. I dont have a macpro thought so i cant apply the update Apple released for that issue.
Also, my macbook is using Lucent / Agere (LSI) firewire chipset (the particular and known revision 6) but i dont think that this is the cause since Apogee didnt have any problems with the chipset
Info: The app im using to monitor the Frequency and Voltage is CoolBook, can be found here: http://www.coolbook.se/CoolBook.html

Firewire Audio disconnected / or AppleFWAudio.kext unloaded = Idle temp arround 50 celcius (iStat)
Firewire Audio Connected with AppleFWAudio.kext loaded = Idle temp arround 60 celcius (iStat)
If theres a possibility that this is due to bus powered firewire device (cause i have an external FW hard drive that is self-powered and temps are not rising when i connect it) then AppleFWAudio.kext maybe manages something with bus powered firewire.
Maybe when i have the interface connected but the kext not loaded the mA sucked by the interface are too little for causing a temp rise but by the time the kext is loaded and the interface is converting audio the mA required tops up so the temp rise comes from the mA load on the firewire bus and not the cpu itself.
*Even if that's the case, the rapid spikes of throttling on the cpu by the time the Firewire Audio interface is connected bothers me. This isn't something that should normaly happen on an idling machine.*

FireWire Audio static

This is kind of a reverse post, in which I've found the solution and wanted to share my findings.
I have an Edirol FA-101, and (after not using it for a while) tried to use it and consistantly got static over the output. (not sure if the behaviour is new to 10.5.7)
(using firewire 400 to the interface, and optical channels 9-10 to a receiver)
the only way i could find to get rid of the static was to open the audio midi setup, under Audio Output click the drop down of the channel/bitrate (to the right of Format:) and click the option... it then magically plays clean.
not sure where fault lies in this one, but it drove me nuts.
Message was edited by: ianwilder

I've seen this issue on several IntelMac edit stations when FCP 6 was first released on through v6.0.2. Just to compare, the problem I've witnessed is that the Firewire audio out will suddenly be nothing but digital garbage; distorted, garbled, scratchy noise. Changing the audio routing to the internal speakers results in normal audio, but as soon as you change it back to Firewire (or Audio Follows Video), nothing but garbage again.
AFAIK, trashing preferences has always worked ... keep us informed on what you find out.
-DH

EMU 1212m Issues (As well as Digi 002R)

Hello everyone. Last year i purchased an EMU 1212m which i installed and ran according to the directions. However recently, when i installed a USB Mixer into my computer it hasn't been responsive. Even when i uninstalled the USB mixer and went back to the EMU, although sound waves could be seen in the patchmix, nothing would come out of my speakers. Any idea as to what the problem might be?
Now, I have recently purchased a Command|8 and I have a Digi 002R on the way. To connect the 002R i require a firewire connection. For the moment i have reinstalled the USB mixer so that i can have sound. Although the Emu is not being used, can i still use the Firewire port on the 1212m daughter card to connect my Digi 002 when it arrives? (The Patchmix software is installed but the Emu is not being used as the soundcard)
Also, if the daughter card will work without the actual 002 card working, can i use, and will i need to use the USB mixer? Thanks alot

Hey,
There are a few things you need to check:
1 - The PatchMix Session you have loaded MUST match the Sample Rate of the file you are playing back
2 - In the Output Assignment Window, you need to have a tick mark against either Mix or Mon for the output that your speakers/monitors are connected to
If you have done this then;
3 - Restore Defaults in PatchMix and restart.
Once the 1212M card is correctly installed and Enabled in Device Manager then you will be able to use the IEEE 1394 connector on the backplate of the 1010 PCI card.
The daughter card is actually the 0202M (Model: 8820)...and the 1010PCI card will function without the daughter card connected. The 0202M has the Analog In/Out and also the MIDI In/Out so if you do not need these connections you do not have to have the 0202M connected to the 1010 PCI card, but as it doesn't take up a PCI slot or additonal resources I don't see why you wouldn't have it connected?
The PatchMix software is fully routable so it is not necessary to have an addtional USB Mixer.
ATB,
~Jen~

High pitch squeal related to Firewire audio device after 10.6.2 audio patch

So the recent Mac Pro audio update 1.0 (applied on 10.6.2) has reduced my CPU temperature with audio playback (Presonus Firebox Firewire audio interface) and that is great. Also haven't had any machine crashes (grey screens) recently which is also great.
The problem is that when the Firebox is plugged into the firewire port of the Mac Pro there is a constant high pitched whistle of slightly oscillating frequency. If I unplug the Firebox the whistle goes away in a few seconds.
After prolonged use in a quiet room (the kind of room you need for audio recording / mixing work!) the noise is enough to drive me crazy.
I read a post on another forum with other people having the same problem. Can anyone comment here on seeing the same thing? Is there any known work around or fix for this?
When the CPU is under heavy load (e.g. H.264 compression etc.) the noise subsides only to return when there is normal load (i.e. half a dozen apps running).
Help!
Thanks

So I was able to back out the update using "Kext Helper b7" and the original IOPlatformPluginFamily.kext and AppleHDA.kext files from a backup before applying the update. It's pretty easy - just drop the two files onto Kext Helper, hit "go" and then reboot.
My ears are no longer in constant pain and I can actually use the Mac Pro again albeit running quite hotter than before.
This is not a fix Apple. The problem looks unrelated to a specific device based on the posts in this thread. Please issue a usable fix for the Mac Pro Audio performance issue.

No sound effects with firewire audio device

I use an external (firewire) sound device for better sound. When I'm in a call, the audio output is routed correctly to that device. But, sound fx, such as when someone sends me an IM or when someone is calling are NOT routed to that device. If I unplug the firewire device, I do hear the sound fx through my macbook speakers. So, if skype is on my side monitor it's very easy for me to miss IMs and calls because I don't hear the sounds. This makes me look very unprofessional to my colleagues. Basically anyone who uses a mac for professional audio/video is going to have an external audio device. Please fix this bug!

I use an external (firewire) sound device for better sound. When I'm in a call, the audio output is routed correctly to that device. But, sound fx, such as when someone sends me an IM or when someone is calling are NOT routed to that device. If I unplug the firewire device, I do hear the sound fx through my macbook speakers. So, if skype is on my side monitor it's very easy for me to miss IMs and calls because I don't hear the sounds. This makes me look very unprofessional to my colleagues. Basically anyone who uses a mac for professional audio/video is going to have an external audio device. Please fix this bug!

Does 2 firewire audio and video interface can work together on FCP ?

hello,
My audio interface is a TC Electronic Konnekt 24D
my video interface is a Canopus ADVC 110
my hard drives are plugged in firewire too
and I use Final Cut Pro 5.0.4
So, the konnekt is recognized by FCP only when the Canopus is not plugged. And even then, the audio sometimes drop out and sometimes causes the app to crash, so that I have to trash the preferences
When I plug the Canopus, the Konnekt 24D is recognised by OS X but not FCP
I want to use the voice over tool with the konnekt 24D, so what should I do ?
Does 2 firewire audio and video interface can work together ?
If so, maybe I only have a driver problem from TC Electronic.
But if not, I have to change this interface. Let me know if only RME, MOTU, Presonus and Edirol work, as it is said on apple's webpage for hardware compatibility
thanks
eMac G4 1,25 Ghz Mac OS X (10.3.9)
eMac G4 1,25 Ghz 1 Go RAM DDR Mac OS X (10.3.9)

The 1082 does show up as a possible input when I open
the VO tool.
Ok. So an audio interface can be plugged to FCP without crashing the app. Because of the Konnekt driver problem, I wasn't shure of this.
I use my Aja box for export & external monitoring.
All my audio sources run back into the Tascam and I
use the analog mixer in the 1082 to monitor different
sources.
When I view external video, the audio follows it to
keep sync.
that's exactly what I want with other I/O interfaces. I'd like to monitor video with the canopus ADVC 110, and monitor audio with the Konnekt 24D (or another interface if this one is not compatible)
I also imput dailies with a deck or a camera (DV or HDV) but that's not the point here.
I want to imput audio with the Konnekt 24D because of its audio quality. Not audio sync to video dailies. But voice over, in sync with FCP video playback (for me, tha ADVC 110)

MacPro distortion for Firewire Audio (duet, digi 002r)

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