Messages in this thread | | | Date | Fri, 21 Mar 2008 00:18:35 +0100 | From | Pavel Machek <> | Subject | Re: USB-audio strange problems |
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Hi! > > > > Problem was not mixer after all... somehow it expects me to play sound > > > > as 8-bit, and then I can play 16-bit mono and actually hear > > > > it. _Strange_. > > > > > > > > So: > > > > > > > > mplayer -ao alsa:device=hw=0 -af format=u8 KDE_Startup.wav > > > > mplayer -ao alsa:device=hw=0 -af format=s16le -af resample=48000 -af channels=1 KDE_Logout_1.ogg > > > > > > > > ...plays both files. > > > > > > > > Forget about the first mplayer, and it will play nothing. > > > > > > Dalls DS4201 has a known bug that it doesn't handle U8 format but only > > > S8 format. The driver changes the supported format flags from U8 to > > > S8 when this USB ID is detected. So you cannot play U8 format > > > natively. (Still strange that it is accepted by mplayer.) > > > > But problem is: I have to. Otherwise the second mplayer will produce > > just silence. > > How about "-ao alsa:device=plughw=0 -af format=u8" ?
mplayer -ao alsa:device=plughw=0 -af format=u8 KDE_Startup.wav
...is silent
mplayer -ao alsa:device=hw=0 -af format=u8 KDE_Startup.wav
...I can hear it. (What's difference between hw and plughw?)
> > Also, even with that treatment, I'm unable to play stereo :-(. > > What shows stream* proc file while playing a 16bit stereo file?
I test by:
mplayer -ao alsa:device=hw=0 -af format=s16le -af resample=48000 KDE_Logout_1.ogg
hobit:/proc/asound# grep . */stream* U0x4fa0x4201/stream0:USB Device 0x4fa:0x4201 at usb-0000:00:1a.0-1, full speed : USB Audio U0x4fa0x4201/stream0:Playback: U0x4fa0x4201/stream0: Status: Running U0x4fa0x4201/stream0: Interface = 1 U0x4fa0x4201/stream0: Altset = 5 U0x4fa0x4201/stream0: URBs = 3 [ 8 8 6 ] U0x4fa0x4201/stream0: Packet Size = 196 U0x4fa0x4201/stream0: Momentary freq = 48000 Hz (0x30.0000) U0x4fa0x4201/stream0: Interface 1 U0x4fa0x4201/stream0: Altset 1 U0x4fa0x4201/stream0: Format: 0x2 U0x4fa0x4201/stream0: Channels: 2 U0x4fa0x4201/stream0: Endpoint: 1 OUT (ASYNC) U0x4fa0x4201/stream0: Rates: 44100, 48000 U0x4fa0x4201/stream0: Interface 1 U0x4fa0x4201/stream0: Altset 2 U0x4fa0x4201/stream0: Format: 0x2 U0x4fa0x4201/stream0: Channels: 1 U0x4fa0x4201/stream0: Endpoint: 1 OUT (ASYNC) U0x4fa0x4201/stream0: Rates: 44100, 48000 U0x4fa0x4201/stream0: Interface 1 U0x4fa0x4201/stream0: Altset 3 U0x4fa0x4201/stream0: Format: 0x0 U0x4fa0x4201/stream0: Channels: 2 U0x4fa0x4201/stream0: Endpoint: 1 OUT (ASYNC) U0x4fa0x4201/stream0: Rates: 44100, 48000 U0x4fa0x4201/stream0: Interface 1 U0x4fa0x4201/stream0: Altset 4 U0x4fa0x4201/stream0: Format: 0x0 U0x4fa0x4201/stream0: Channels: 1 U0x4fa0x4201/stream0: Endpoint: 1 OUT (ASYNC) U0x4fa0x4201/stream0: Rates: 44100, 48000 U0x4fa0x4201/stream0: Interface 1 U0x4fa0x4201/stream0: Altset 5 U0x4fa0x4201/stream0: Format: 0x2 U0x4fa0x4201/stream0: Channels: 2 U0x4fa0x4201/stream0: Endpoint: 1 OUT (ADAPTIVE) U0x4fa0x4201/stream0: Rates: 44100, 48000 card0/stream0:USB Device 0x4fa:0x4201 at usb-0000:00:1a.0-1, full speed : USB Audio card0/stream0:Playback: card0/stream0: Status: Running card0/stream0: Interface = 1 card0/stream0: Altset = 5 card0/stream0: URBs = 3 [ 8 8 6 ] card0/stream0: Packet Size = 196 card0/stream0: Momentary freq = 48000 Hz (0x30.0000) card0/stream0: Interface 1 card0/stream0: Altset 1 card0/stream0: Format: 0x2 card0/stream0: Channels: 2 card0/stream0: Endpoint: 1 OUT (ASYNC) card0/stream0: Rates: 44100, 48000 card0/stream0: Interface 1 card0/stream0: Altset 2 card0/stream0: Format: 0x2 card0/stream0: Channels: 1 card0/stream0: Endpoint: 1 OUT (ASYNC) card0/stream0: Rates: 44100, 48000 card0/stream0: Interface 1 card0/stream0: Altset 3 card0/stream0: Format: 0x0 card0/stream0: Channels: 2 card0/stream0: Endpoint: 1 OUT (ASYNC) card0/stream0: Rates: 44100, 48000 card0/stream0: Interface 1 card0/stream0: Altset 4 card0/stream0: Format: 0x0 card0/stream0: Channels: 1 card0/stream0: Endpoint: 1 OUT (ASYNC) card0/stream0: Rates: 44100, 48000 card0/stream0: Interface 1 card0/stream0: Altset 5 card0/stream0: Format: 0x2 card0/stream0: Channels: 2 card0/stream0: Endpoint: 1 OUT (ADAPTIVE) card0/stream0: Rates: 44100, 48000 hobit:/proc/asound#
Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html pomozte zachranit klanovicky les: http://www.ujezdskystrom.info/
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