On Saturday 11 November 2006 23:14, Chris Abbott was like: > Chris Abbott wrote: > > Just recently I recorded a live piano concerto. All of this was done > > using an ART Pre-amp, a Soundphone(I believe is the brand) CD burner, > > M-audio Omnistudio USB, and an iBook G4. Now, the pre-amp had a digital > > out that went to the CD burner. The 1/4" outputs of the pre-amp went to > > the M-audio which was connected to the ibook. Well, the burned CDs > > turned at great(note-I had the digital sample rate set to 48Khz). I had > > my Omnistudio set at 96Khz. Every so often in the recoding, you hear a > > bit of pop, which to me seems like some other system resource got > > priority. The only thing that occurred while recording was the display > > going to sleep. The airport was off, and Ardour, X11, and JackPilot were > > the only programs running. I'm curious as to what could have caused > > this, how to fix it. The next time I do a recording with it, I will > > probably have to drop the sample rate to 48Khz.
Darwin generally has good support for realtime scheduling. Do ardour or jackd report any xruns? How large a period size are you using? (That can be a problem with many USB devices.) For recording, large -p settings are generally safer.
> I forget to mention that I was in OSX at the time all of this occurred. > Unfortunately, Linux doesn't support the M-Audio Omnistudio USB that well.
Many Linux users have reported problems with various M-Audio USB devices. A pity, because their PCI devices work great. This could very well be a device problem, but people here are unlikely to know much about that. I certainly don't. On 11/12/06, tim hall <tech@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
Try asking on an OSX / Darwin Audio mailing list. Unfortunately for you, the Linux Audio Users list doesn't provide support for Darwin based systems at all. Maybe worth asking at the GNU/Darwin project?
This is not entirely true. Many "Linux" audio developers actively support OSX as well. This list is a good way to reach quite a few of them. However, as Tim suggests, answers to questions about Darwin hardware support for a specific USB device are unlikely to receive good answers here. -- joq
