* Audiophile USB samplerate workaround @ 2003-07-23 6:59 Ben Saylor 2003-07-23 8:29 ` Takashi Iwai 0 siblings, 1 reply; 8+ messages in thread From: Ben Saylor @ 2003-07-23 6:59 UTC (permalink / raw) To: alsa-devel I did some investigation to find out why the sample rate can't be set to anything but 48khz (or rather, remains 48khz even if it is set to something else) on the Audiophile. In init_usb_sample_rate(), if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) is never true, so the sample rate is not set. If I just make it if(1) the sample rate is settable. Is this a hardware bug or something else? Ben ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Audiophile USB samplerate workaround 2003-07-23 6:59 Audiophile USB samplerate workaround Ben Saylor @ 2003-07-23 8:29 ` Takashi Iwai 2003-07-23 9:02 ` Ben Saylor 0 siblings, 1 reply; 8+ messages in thread From: Takashi Iwai @ 2003-07-23 8:29 UTC (permalink / raw) To: Ben Saylor; +Cc: alsa-devel At Tue, 22 Jul 2003 22:59:25 -0800, Ben Saylor wrote: > > I did some investigation to find out why the sample rate can't be set to > anything but 48khz (or rather, remains 48khz even if it is set to > something else) on the Audiophile. does format descriptor contain other sample rates? > In init_usb_sample_rate(), > if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) > is never true, so the sample rate is not set. If I just make it if(1) > the sample rate is settable. Is this a hardware bug or something else? then the format descriptor might be bogus. Takashi ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Audiophile USB samplerate workaround 2003-07-23 8:29 ` Takashi Iwai @ 2003-07-23 9:02 ` Ben Saylor 2003-07-23 9:33 ` Takashi Iwai 0 siblings, 1 reply; 8+ messages in thread From: Ben Saylor @ 2003-07-23 9:02 UTC (permalink / raw) To: alsa-devel On Wednesday 23 July 2003 12:29 am, you wrote: > At Tue, 22 Jul 2003 22:59:25 -0800, > > Ben Saylor wrote: > > I did some investigation to find out why the sample rate can't be > > set to anything but 48khz (or rather, remains 48khz even if it is > > set to something else) on the Audiophile. > > does format descriptor contain other sample rates? In parse_audio_format_rates(), nr_rates is always 0 (continuous). /proc/asound/card0/stream{0,1} reflect the same. Most of the altsets are 8000-48000 continuous. I hope that's a meaningful answer. :) > > In init_usb_sample_rate(), > > if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) > > is never true, so the sample rate is not set. If I just make it > > if(1) the sample rate is settable. Is this a hardware bug or > > something else? > > then the format descriptor might be bogus. > > > Takashi ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Audiophile USB samplerate workaround 2003-07-23 9:02 ` Ben Saylor @ 2003-07-23 9:33 ` Takashi Iwai 2003-07-23 10:05 ` Ben Saylor 0 siblings, 1 reply; 8+ messages in thread From: Takashi Iwai @ 2003-07-23 9:33 UTC (permalink / raw) To: Ben Saylor; +Cc: alsa-devel At Wed, 23 Jul 2003 01:02:19 -0800, Ben Saylor wrote: > > On Wednesday 23 July 2003 12:29 am, you wrote: > > At Tue, 22 Jul 2003 22:59:25 -0800, > > > > Ben Saylor wrote: > > > I did some investigation to find out why the sample rate can't be > > > set to anything but 48khz (or rather, remains 48khz even if it is > > > set to something else) on the Audiophile. > > > > does format descriptor contain other sample rates? > > In parse_audio_format_rates(), nr_rates is always 0 (continuous). > /proc/asound/card0/stream{0,1} reflect the same. Most of the altsets > are 8000-48000 continuous. I hope that's a meaningful answer. :) ok, then it supports other sample rates :) about the symptom: do you mean that the playback gets too fast with the lower sample rate, or the driver doesn't accept anything else 48k? Takashi ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Audiophile USB samplerate workaround 2003-07-23 9:33 ` Takashi Iwai @ 2003-07-23 10:05 ` Ben Saylor 2003-07-23 10:17 ` Takashi Iwai 0 siblings, 1 reply; 8+ messages in thread From: Ben Saylor @ 2003-07-23 10:05 UTC (permalink / raw) To: alsa-devel > ok, then it supports other sample rates :) > > about the symptom: do you mean that the playback gets too fast with > the lower sample rate, Yes. i.e. it will play a 44100 hz or whatever stream, but playback is too fast. > or the driver doesn't accept anything else > 48k? > > > Takashi ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Audiophile USB samplerate workaround 2003-07-23 10:05 ` Ben Saylor @ 2003-07-23 10:17 ` Takashi Iwai 2003-07-23 21:14 ` Ben Saylor 0 siblings, 1 reply; 8+ messages in thread From: Takashi Iwai @ 2003-07-23 10:17 UTC (permalink / raw) To: Ben Saylor; +Cc: alsa-devel At Wed, 23 Jul 2003 02:05:50 -0800, Ben Saylor wrote: > > > ok, then it supports other sample rates :) > > > > about the symptom: do you mean that the playback gets too fast with > > the lower sample rate, > > Yes. i.e. it will play a 44100 hz or whatever stream, but playback is > too fast. so apparently we need some workaround (as found below line 2291 of usbaudio.c). please try to check the product and vendor id and set fp->attribtes |= EP_CS_ATTR_SAMPLERATE with that condition. if it works, please give me the patch. thanks, Takashi ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Audiophile USB samplerate workaround 2003-07-23 10:17 ` Takashi Iwai @ 2003-07-23 21:14 ` Ben Saylor 2003-07-24 13:04 ` Takashi Iwai 0 siblings, 1 reply; 8+ messages in thread From: Ben Saylor @ 2003-07-23 21:14 UTC (permalink / raw) To: Takashi Iwai; +Cc: alsa-devel [-- Attachment #1: Type: text/plain, Size: 988 bytes --] That does the trick. Here's a patch against 0.9.5. I don't know if this is related, but one thing I've been puzzling over is that half the time after I plug in the audiophile I get static instead of sound. I have to unload alsa and plug it in again. (As I mentioned before, I always get static if I load the alsa modules explicitly). Ben On Wednesday 23 July 2003 2:17 am, Takashi Iwai wrote: > At Wed, 23 Jul 2003 02:05:50 -0800, > > Ben Saylor wrote: > > > ok, then it supports other sample rates :) > > > > > > about the symptom: do you mean that the playback gets too fast > > > with the lower sample rate, > > > > Yes. i.e. it will play a 44100 hz or whatever stream, but playback > > is too fast. > > so apparently we need some workaround (as found below line 2291 of > usbaudio.c). > please try to check the product and vendor id and set > fp->attribtes |= EP_CS_ATTR_SAMPLERATE > with that condition. > if it works, please give me the patch. > > > thanks, > > Takashi [-- Attachment #2: audiophile1.diff --] [-- Type: text/x-diff, Size: 1630 bytes --] --- alsa-driver-0.9.5/alsa-kernel/usb/usbaudio.c 2003-06-23 04:41:36.000000000 -0800 +++ alsa-driver-0.9.5-brs/alsa-kernel/usb/usbaudio.c 2003-07-23 12:53:19.000000000 -0800 @@ -2295,6 +2295,14 @@ */ fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE; } + + /* workaround for M-Audio Audiophile USB */ + if (dev->descriptor.idVendor == 0x0763 && + dev->descriptor.idProduct == 0x2003) { + /* doesn't set the sample rate attribute, but supports it */ + fp->attributes |= EP_CS_ATTR_SAMPLE_RATE; + } + /* * plantronics headset and Griffin iMic have set adaptive-in * although it's really not... @@ -2695,11 +2703,6 @@ if (quirk && quirk->ifnum != QUIRK_ANY_INTERFACE && ifnum != quirk->ifnum) goto __err_val; - if (usb_set_configuration(dev, get_cfg_desc(config)->bConfigurationValue) < 0) { - snd_printk(KERN_ERR "cannot set configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue); - goto __err_val; - } - /* SB Extigy needs special boot-up sequence */ /* if more models come, this will go to the quirk list. */ if (dev->descriptor.idVendor == 0x041e && dev->descriptor.idProduct == 0x3000) { @@ -2729,6 +2732,11 @@ /* it's a fresh one. * now look for an empty slot and create a new card instance */ + if (usb_set_configuration(dev, get_cfg_desc(config)->bConfigurationValue) < 0) { + snd_printk(KERN_ERR "cannot set configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue); + goto __err_val; + } + for (i = 0; i < SNDRV_CARDS; i++) if (enable[i] && ! usb_chip[i] && (vid[i] == -1 || vid[i] == dev->descriptor.idVendor) && ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: Audiophile USB samplerate workaround 2003-07-23 21:14 ` Ben Saylor @ 2003-07-24 13:04 ` Takashi Iwai 0 siblings, 0 replies; 8+ messages in thread From: Takashi Iwai @ 2003-07-24 13:04 UTC (permalink / raw) To: Ben Saylor; +Cc: alsa-devel At Wed, 23 Jul 2003 13:14:03 -0800, Ben Saylor wrote: > > [1 <text/plain; iso-8859-1 (7bit)>] > That does the trick. Here's a patch against 0.9.5. thanks for the patch. i applied to cvs. > I don't know if this is related, but one thing I've been puzzling over > is that half the time after I plug in the audiophile I get static > instead of sound. I have to unload alsa and plug it in again. (As I > mentioned before, I always get static if I load the alsa modules > explicitly). i don't know exactly what is the cause here, too... Takashi ------------------------------------------------------- This SF.Net email sponsored by: Free pre-built ASP.NET sites including Data Reports, E-commerce, Portals, and Forums are available now. Download today and enter to win an XBOX or Visual Studio .NET. http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01 ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2003-07-24 13:04 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2003-07-23 6:59 Audiophile USB samplerate workaround Ben Saylor 2003-07-23 8:29 ` Takashi Iwai 2003-07-23 9:02 ` Ben Saylor 2003-07-23 9:33 ` Takashi Iwai 2003-07-23 10:05 ` Ben Saylor 2003-07-23 10:17 ` Takashi Iwai 2003-07-23 21:14 ` Ben Saylor 2003-07-24 13:04 ` Takashi Iwai
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