Re: AW: [Alsa-devel] usb quattro

2002-09-24 Thread Patrick Shirkey
Patrick Shirkey wrote: > Takashi Iwai wrote: > >> the resolution of usb-audio device is 1ms. this value is fixed. >> thus you need to adjust the period size according to the sample rate >> if you want to achieve the real-time response with a small period >> size. >> >> that means: >> - the sampl

Re: AW: [Alsa-devel] usb quattro

2002-09-21 Thread Patrick Shirkey
Takashi Iwai wrote: > the resolution of usb-audio device is 1ms. this value is fixed. > thus you need to adjust the period size according to the sample rate > if you want to achieve the real-time response with a small period > size. > > that means: > - the sample rate should be 48kHz (or 32kHz)

Re: AW: [Alsa-devel] usb quattro

2002-09-09 Thread Patrick Shirkey
Patrick Shirkey wrote: > Currently the hw layer produces white > noise. > What is odd about this is that the noise only comes from the internal i/o. If I play through an external and use the direct monitor switch the sound is perfect. I get the most stable jack with these settings: - usi

Re: AW: [Alsa-devel] usb quattro

2002-09-09 Thread Patrick Shirkey
Patrick Shirkey wrote: >> >> the resolution of usb-audio device is 1ms. this value is fixed. >> thus you need to adjust the period size according to the sample rate >> if you want to achieve the real-time response with a small period >> size. >> >> that means: >> - the sample rate should be 48kH

Re: AW: [Alsa-devel] usb quattro

2002-09-09 Thread Patrick Shirkey
Takashi Iwai wrote: > At Sat, 07 Sep 2002 05:40:02 +0900, > Patrick Shirkey wrote: > >>Takashi Iwai wrote: >> >> the Tascam US-428 driver (copied / changed from snd-usb-audio ) showed a similar problem. I worked around it by not using ASYNC_UNLINKing of the urbs. >>> >>> >>>yes, this

Re: AW: [Alsa-devel] usb quattro

2002-09-09 Thread Takashi Iwai
At Sat, 07 Sep 2002 05:40:02 +0900, Patrick Shirkey wrote: > > Takashi Iwai wrote: > > >>the Tascam US-428 driver (copied / changed from snd-usb-audio ) showed a > >>similar problem. > >>I worked around it by not using ASYNC_UNLINKing of the urbs. > > > > > > yes, this could be the problem. >

Re: AW: [Alsa-devel] usb quattro

2002-09-06 Thread Patrick Shirkey
Patrick Shirkey wrote: > > I have actually managed to get a stream from alsaplayer through without > a hang but the sound is choppy. > > I will make a test signal so you can hear what I am getting. It's > similar to what was happening before the driver was fixed last time. > Well I just no

Re: AW: [Alsa-devel] usb quattro

2002-09-06 Thread Patrick Shirkey
Takashi Iwai wrote: >>the Tascam US-428 driver (copied / changed from snd-usb-audio ) showed a >>similar problem. >>I worked around it by not using ASYNC_UNLINKing of the urbs. > > > yes, this could be the problem. > this happend once and i thought it fixed on the alsa side, but it > seems tha

Re: AW: [Alsa-devel] usb quattro

2002-09-06 Thread Takashi Iwai
At Thu, 5 Sep 2002 21:02:00 +0200, Karsten Wiese wrote: > > > Here's what I get from ksymoops > > > > > > Warning (compare_maps): ksyms_base symbol > > vmalloc_to_page_R__ver_vmalloc_to_page not found in System.map. > > Ignoring ksyms_base entry > > Unable to handle kernel NULL pointer deref

Re: AW: [Alsa-devel] usb quattro

2002-09-05 Thread Patrick Shirkey
Karsten Wiese wrote: >> >>EIP; c01e52e4<= >> > > > the Tascam US-428 driver (copied / changed from snd-usb-audio ) showed a > similar problem. > I worked around it by not using ASYNC_UNLINKing of the urbs. > > uhci_remove_pending_qhs is called to unlink urbs in ASYNC mode. > seems as i