To: Brendon and Wendy <wendy.humphrey@comcast.net>
Date: Tue, 30 Dec 2003 11:58:17 +0000
On Sun, 2003-12-28 at 23:26, Brendon and Wendy wrote:
> All,
>
> I'm interested in getting my USB web camera working under -current. I
> see that the uaudio.c (and associated files) are really old relative to
> the netbsd ones, and that record capability is missing from the FreeBSD
> equivalent files.
>
> So, my question is would anyone object to me having a go at freshening
> the uaudio driver up? Could the audio guys please let me know if this is
> totally infeasable?
You will have problems getting usb audio working reliably in current.
Last time I looked at it, there were lots of problems because audio has
been locked up for SMP but USB hasn't. As a result, the audio backend
calls USB code without Giant being held. Things might have changed since
then, I guess.
Re: Sci Fi in 6 worms ... I'd been assuming that a USB sound-thing would ... But it needs low-latency, which is why version 2 uses its own harware input box, whereas version 1 used a simple pre-amp footpedal box plugged into a normal audio input on whatever your soundcard was - and was therefore susceptible to poor latency. ... To try and get a bit more technical, it takes most of a full wave-cycle for the audio processing software to have any chance of recognising the pitch and harmonics of an input, before it can begin to start processing it. ... Therefore, you need very efficient audio drivers to get usable sound, and ASIO are some of the best. ... (uk.rec.sheds)
Re: Auswahl der Aufnahmequelle bei Terratec Aureon 5.1 USB ... An meinen neuen PC habe ich eine Terratec Aureon 5.1 USB angeschlossen. ... Line und Mikrofon als Aufnahmequellen vorgesehen...."Virtual Audio Cable" oder vergleichbare Software. ... Das packt der USB-Soundcontroller offenbar nicht, deshalb gibt's im Aufnahmepanel nur die Quellen, die im reinen "digital recording mode" oder "analog recording mode" zur Verfügung steht. ... (de.comp.audio)
Re: Tascam US-122 vs. MBox Interfaces ... Your steps 4 through 9, which is where the real-time processing occurs, ... happen in the computer without routing through USB.... there was 16-bit code in the audio app or plug-in. ... (rec.music.makers.guitar.jazz)
Re: Old laptop as audio "analyzer" ... > with the very cool and free "Rightmark Audio Analyzer"... > the internal sound on this laptop is absolute garbage. ... Laptops are one reason why USB and Firewire interfaces are so popular. ... (rec.audio.pro)
Re: [patch] voluntary-preempt-2.6.9-rc3-mm3-T3 ... This fixes the USB boot time problem / USB mouse does not work. ... I do not have the problem others have reported with audio - audio works ... Both tests run with both hard IRQ and soft IRQ threads ... I will send the detailed traces separately.... (Linux-Kernel)
