ppc usb-audio problems

ppc usb-audio problems

[Albert Jongkit Wong]

I'm using gentoo linux ver 1.4rc1 on a G4 cube with gcc3.2 and
alsa-0.9.0rc3 and am having some major problems getting alsa to work
properly.

When trying to use the native alsa interface, most programs either give 
out just static or if they manage to play something coherent, the output 
is noisy and sounds as if it has been clipped.

If I try to use the OSS emulation, I get error messages like:
	No supported rate found
or 
	** WARNING **: SNDCTL_DSP_SETFMT ioctl failed: Invalid argument 
(The first is from mpg123 and the second is from xmms).

After this message, mpg123 just quits.  Xmms however, continues to 
function and actually gives clear, coorect output.  So far, no other 
program works.

Any ideas on what might be happening?  I had a similar effect with 
alsa-0.9.0rc2 on gentoo linux 1.2 using gcc-2.95.3.

Thanks,
Albert





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Re: ppc usb-audio problems

[Takashi Iwai]

At Sat, 5 Oct 2002 18:05:50 -0700 (PDT),
Albert Jongkit Wong wrote:
> 
> I'm using gentoo linux ver 1.4rc1 on a G4 cube with gcc3.2 and
> alsa-0.9.0rc3 and am having some major problems getting alsa to work
> properly.

which device are you using?

> When trying to use the native alsa interface, most programs either give 
> out just static or if they manage to play something coherent, the output 
> is noisy and sounds as if it has been clipped.
 
please try the cvs version if you use a usb driver.
the usb driver has been changed largely since rc3.

also, please send me the output of "lsusb -v" for the device.
this will help debugging very much.


ciao,

Takashi


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Re: ppc usb-audio problems

[Albert Jongkit Wong]

> which device are you using?

The "Apple Speakers" that come with the cube.  (They're just 2 usb 
speakers.  No subwoofers or anything like that).
 
> please try the cvs version if you use a usb driver.
> the usb driver has been changed largely since rc3.

I upgraded my drivers to the latest usb version and now mpg123 works.  
However, the native alsa interface still doesn't seem to work.
 
Running xmms with the native alsa plugin still produces just static.
Trying to start esd produces the following error messages:

Audio device open for 44.1Khz, stereo, 16bit failed
Trying 44.1Khz, 8bit stereo.
Audio device open for 44.1Khz, stereo, 8bit failed
Trying 48Khz, 16bit stereo.
Audio device open for 48Khz, stereo,16bit failed
Trying 22.05Khz, 8bit stereo.
Audio device open for 22.05Khz, stereo, 8bit failed
Trying 44.1Khz, 16bit mono.
Audio device open for 44.1Khz, mono, 8bit failed
Trying 22.05Khz, 8bit mono.
Audio device open for 22.05Khz, mono, 8bit failed
Trying 11.025Khz, 8bit stereo.
Audio device open for 11.025Khz, stereo, 8bit failed
Trying 11.025Khz, 8bit mono.
Audio device open for 11.025Khz, mono, 8bit failed
Trying 8.192Khz, 8bit mono.
Audio device open for 8.192Khz, mono, 8bit failed
Trying 8Khz, 8bit mono.
Sound device inadequate for Esound. Fatal.


The resulting entry for my speakers from running "lsusb -v" is attached 
at the end.

Let me know if I can provide any more info or any help.

Thanks,
Albert

*** Result from "lsusb -v" ***

Bus 001 Device 002: ID ac05:0111  
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB              10.01
  bDeviceClass            0 Interface
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0xac05 
  idProduct          0x0111 
  bcdDevice            1.00
  iManufacturer           3 Apple Computer, Inc.
  iProduct                1 Speakers
  iSerial                 2 p4000
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          239
    bNumInterfaces          3
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x80
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength           43
        bInCollection           1
        baInterfaceNr( 0)       1
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bNrChannels             2
        wChannelConfig     0x0003
          Left Front (L)
          Right Front (R)
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 2
        bSourceID               1
        bControlSize            2
        bmaControls( 0)      0x55
        bmaControls( 1)      0x01
          Mute
          Bass
          Treble
          Automatic Gain
          Bass Boost
        bmaControls( 0)      0x02
        bmaControls( 1)      0x00
          Volume
        bmaControls( 0)      0x02
        bmaControls( 1)      0x00
          Volume
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0301 Speaker
        bAssocTerminal          0
        bSourceID               2
        iTerminal               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                11
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      junk at descriptor end: 01 00
      AudioControl Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           1
        bDelay                  0 frames
        wFormatTag              1 PCM
      AudioControl Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            0 Continuous
        tLowerSamFreq        5000
        tUpperSamFreq       50000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
        wMaxPacketSize        112
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x00
          bLockDelayUnits         2 Decoded PCM samples
          wLockDelay              1 Decoded PCM samples
    Interface Descriptor:
      bLength                11
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      junk at descriptor end: 01 00
      AudioControl Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           1
        bDelay                  0 frames
        wFormatTag              1 PCM
      AudioControl Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             2
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            0 Continuous
        tLowerSamFreq        5000
        tUpperSamFreq       50000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
        wMaxPacketSize        224
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x00
          bLockDelayUnits         2 Decoded PCM samples
          wLockDelay              1 Decoded PCM samples
    Interface Descriptor:
      bLength                11
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      junk at descriptor end: 01 00
      AudioControl Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           1
        bDelay                  0 frames
        wFormatTag              1 PCM
      AudioControl Interface Descriptor:
        bLength                14
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             2
        bSubframeSize           3
        bBitResolution         24
        bSamFreqType            0 Continuous
        tLowerSamFreq        5000
        tUpperSamFreq       50000
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
        wMaxPacketSize        336
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioControl Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x00
          bLockDelayUnits         2 Decoded PCM samples
          wLockDelay              1 Decoded PCM samples
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      49
cannot get report descriptor
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          2
        bInterval               8
  Language IDs: (length=6)
     0009 English(English)
     0004 Chinese(Chinese)



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Re: ppc usb-audio problems

[Takashi Iwai]

At Tue, 8 Oct 2002 18:09:18 -0700 (PDT),
Albert Jongkit Wong wrote:
> 
> > which device are you using?
> 
> The "Apple Speakers" that come with the cube.  (They're just 2 usb 
> speakers.  No subwoofers or anything like that).
>  
> > please try the cvs version if you use a usb driver.
> > the usb driver has been changed largely since rc3.
> 
> I upgraded my drivers to the latest usb version and now mpg123 works.  
> However, the native alsa interface still doesn't seem to work.
> 
> Running xmms with the native alsa plugin still produces just static.

do you mean that the playback position moves but no sounds come out?
and does oss plugin work?

> Trying to start esd produces the following error messages:

please check /proc/asound/card0/stream0 which format is supported
actually.


Takashi


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Re: ppc usb-audio problems

[Albert Jongkit Wong]

> do you mean that the playback position moves but no sounds come out?
> and does oss plugin work?

With the alsa plugin, the playback position moves and I get stuff that 
just sounds like static instead of music (the volume controls still work).  
The oss plugin works fine.  

I just tried another test by doing:

mpg321 -s /mnt/mp3/Mpegs/Anime/Arc\ en\ Ciel,\ Le/DIVE_T~1.MP3 | aplay -c 
2 -t raw -r 44100 -f S16_LE -

Which worked properly.  Is it possible that xmms, esd, mplayer, etc are
the broken ones?
 


> please check /proc/asound/card0/stream0 which format is supported
> actually.

I'm not sure how to read this output, so I'm pasting it below.

terran@Mittermeyer asound $ cat card0/stream0 
Apple Computer, Inc. Speakers : USB Audio

Playback:
  Status: Stop
  Interface 1
    Altset 1
    Format: S16_LE
    Channels: 1
    Endpoint: 1 OUT (ADAPTIVE)
    Rates: 5000 - 50000 (continous)
  Interface 1
    Altset 2
    Format: S16_LE
    Channels: 2
    Endpoint: 1 OUT (ADAPTIVE)
    Rates: 5000 - 50000 (continous)
  Interface 1
    Altset 3
    Format: S24_3LE
    Channels: 2
    Endpoint: 1 OUT (ADAPTIVE)
    Rates: 5000 - 50000 (continous)



Thanks,

Albert



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Re: ppc usb-audio problems

[Takashi Iwai]

At Wed, 9 Oct 2002 11:08:43 -0700 (PDT),
Albert Jongkit Wong wrote:
> 
> > do you mean that the playback position moves but no sounds come out?
> > and does oss plugin work?
> 
> With the alsa plugin, the playback position moves and I get stuff that 
> just sounds like static instead of music (the volume controls still work).  
> The oss plugin works fine.  

strange...

> I just tried another test by doing:
> 
> mpg321 -s /mnt/mp3/Mpegs/Anime/Arc\ en\ Ciel,\ Le/DIVE_T~1.MP3 | aplay -c 
> 2 -t raw -r 44100 -f S16_LE -
> 
> Which worked properly.  Is it possible that xmms, esd, mplayer, etc are
> the broken ones?

i don't think all of them are broken.
possibly this behavior might be influenced by the period size, etc.
can you check /proc/asound/card0/pcm0p/sub0/hw_params at each case and
compare them?

> 
> > please check /proc/asound/card0/stream0 which format is supported
> > actually.
> 
> I'm not sure how to read this output, so I'm pasting it below.
> 
> terran@Mittermeyer asound $ cat card0/stream0 
> Apple Computer, Inc. Speakers : USB Audio
> 
> Playback:
>   Status: Stop
>   Interface 1
>     Altset 1
>     Format: S16_LE
>     Channels: 1
>     Endpoint: 1 OUT (ADAPTIVE)
>     Rates: 5000 - 50000 (continous)
>   Interface 1
>     Altset 2
>     Format: S16_LE
>     Channels: 2
>     Endpoint: 1 OUT (ADAPTIVE)
>     Rates: 5000 - 50000 (continous)
>   Interface 1
>     Altset 3
>     Format: S24_3LE
>     Channels: 2
>     Endpoint: 1 OUT (ADAPTIVE)
>     Rates: 5000 - 50000 (continous)

ok, the above means that the pcm supports three different formats,
16bit and 24bit, one or two channels for S16_LE.
it looks ok.

btw, if you look at this file during the pcm is running, the running
status is also shown.


Takashi


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Re: ppc usb-audio problems

[Albert Jongkit Wong]

> i don't think all of them are broken.
> possibly this behavior might be influenced by the period size, etc.
> can you check /proc/asound/card0/pcm0p/sub0/hw_params at each case and
> compare them?


So I tried playing the same mp3 in 3 methods.  The first was using xmms 
through its oss output device. The second was using xmms with its alsa 
plugin.  The third was using the pipe of raw sound data from mpg123 to 
aplay (mpg321 -s /mnt/mp3/Mpegs/Anime/Arc\ en\ Ciel,\ Le/DIVE_T~1.MP3 | 
aplay -c 2 -t raw -r 44100 -f S16_LE -).  Here's the output of hw_params 
for each:

xmms (oss)
terran@Mittermeyer terran $ cat /proc/asound/card0/pcm0p/sub0/hw_params 
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (44100/1)
period_size: 1024
buffer_size: 16384
tick_time: 10000
OSS format: S16_BE
OSS channels: 2
OSS rate: 44100
OSS period bytes: 4096
OSS periods: 16

xmms (alsa)
terran@Mittermeyer terran $ cat /proc/asound/card0/pcm0p/sub0/hw_params 
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (44100/1)
period_size: 2205
buffer_size: 16384
tick_time: 10000


mpg123 piped to aplay
terran@Mittermeyer terran $ cat /proc/asound/card0/pcm0p/sub0/hw_params 
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (44100/1)
period_size: 4096
buffer_size: 16384
tick_time: 10000



You'ore right, the period_size is different for each test.  The xmms alsa 
plugin is not a power of 2 however.  Is that problem?

esd and mplayer still refuse to start.

Esd failing to set any format giving this output:

terran@Mittermeyer terran $ esd
Audio device open for 44.1Khz, stereo, 16bit failed
Trying 44.1Khz, 8bit stereo.
Audio device open for 44.1Khz, stereo, 8bit failed
Trying 48Khz, 16bit stereo.
Audio device open for 48Khz, stereo,16bit failed
Trying 22.05Khz, 8bit stereo.
Audio device open for 22.05Khz, stereo, 8bit failed
Trying 44.1Khz, 16bit mono.
Audio device open for 44.1Khz, mono, 8bit failed
Trying 22.05Khz, 8bit mono.
Audio device open for 22.05Khz, mono, 8bit failed
Trying 11.025Khz, 8bit stereo.
Audio device open for 11.025Khz, stereo, 8bit failed
Trying 11.025Khz, 8bit mono.
Audio device open for 11.025Khz, mono, 8bit failed
Trying 8.192Khz, 8bit mono.
Audio device open for 8.192Khz, mono, 8bit failed
Trying 8Khz, 8bit mono.
Sound device inadequate for Esound. Fatal.


And mplayer apparently couldn't initialize its alsa9 codec:
 
==========================================================================
AO: [alsa9] 24000Hz 2ch Signed 16-bit (Big-Endian)
alsa-init: testing and bugreports are welcome.
alsa-init: requested format: 24000 Hz, 2 channels, Signed 16-bit 
(Big-Endian)
alsa-init: 1 soundcard found, using: hw:0,0
alsa-init: unable to set format: Invalid argument
couldn't open/init audio device -> no sound
Audio: no sound!!!


Is there any more information I can provide?


Thanks for being so patient with this.  It is very much appreciated.


-Albert





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Re: ppc usb-audio problems

[Takashi Iwai]

Hi,

At Thu, 10 Oct 2002 22:31:33 -0700 (PDT),
Albert Jongkit Wong wrote:
> 
> > i don't think all of them are broken.
> > possibly this behavior might be influenced by the period size, etc.
> > can you check /proc/asound/card0/pcm0p/sub0/hw_params at each case and
> > compare them?
> 
> 
> xmms (oss)
...
> OSS format: S16_BE
              ^^^^^^

> xmms (alsa)
...
> format: S16_LE
          ^^^^^^

ah, perhaps xmms alsa plugin doesn't care the endianess.
if so, it's a bug of alsa output plugin.

> 
> You'ore right, the period_size is different for each test.  The xmms alsa 
> plugin is not a power of 2 however.  Is that problem?
> 
> esd and mplayer still refuse to start.
> 
> Esd failing to set any format giving this output:
> 
> terran@Mittermeyer terran $ esd
> Audio device open for 44.1Khz, stereo, 16bit failed
> Trying 44.1Khz, 8bit stereo.
> Audio device open for 44.1Khz, stereo, 8bit failed
> Trying 48Khz, 16bit stereo.
> Audio device open for 48Khz, stereo,16bit failed
> Trying 22.05Khz, 8bit stereo.
> Audio device open for 22.05Khz, stereo, 8bit failed
> Trying 44.1Khz, 16bit mono.
> Audio device open for 44.1Khz, mono, 8bit failed
> Trying 22.05Khz, 8bit mono.
> Audio device open for 22.05Khz, mono, 8bit failed
> Trying 11.025Khz, 8bit stereo.
> Audio device open for 11.025Khz, stereo, 8bit failed
> Trying 11.025Khz, 8bit mono.
> Audio device open for 11.025Khz, mono, 8bit failed
> Trying 8.192Khz, 8bit mono.
> Audio device open for 8.192Khz, mono, 8bit failed
> Trying 8Khz, 8bit mono.
> Sound device inadequate for Esound. Fatal.

hmm, most likely the same reason.
esd requests big-endian formats (as native machine format), which are
not supported on usb devices.
try to use the pcm 'plughw:0,0' instead of 'hw:0,0'.
(well, iirc, there is a bug in esound alsa output.  the command-line
 option is never passed as the device...)

> 
> And mplayer apparently couldn't initialize its alsa9 codec:
>  
> ==========================================================================
> AO: [alsa9] 24000Hz 2ch Signed 16-bit (Big-Endian)
> alsa-init: testing and bugreports are welcome.
> alsa-init: requested format: 24000 Hz, 2 channels, Signed 16-bit 
> (Big-Endian)
  ^^^^^^^^^^^^
> alsa-init: 1 soundcard found, using: hw:0,0
> alsa-init: unable to set format: Invalid argument
> couldn't open/init audio device -> no sound
> Audio: no sound!!!

ditto.  you need to convert endianess.  plughw:0,0 will do that.


ciao,

Takashi


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Re: ppc usb-audio problems

[Albert Jongkit Wong]

Hello,

> ah, perhaps xmms alsa plugin doesn't care the endianess.
> if so, it's a bug of alsa output plugin.

I started hacking at the code.  It looks like the xmms alsa plugin is fine 
(if a bit messy).  However, it looks like their mpg123 input plugin is 
always output big-endian data even when it says it is outputing the native 
format data...hrm...  I'm not sure if that was intentional or not.  In 
either case, it's their bug so I'm bugging them about it now.
 
> hmm, most likely the same reason.
> esd requests big-endian formats (as native machine format), which are
> not supported on usb devices.
> try to use the pcm 'plughw:0,0' instead of 'hw:0,0'.
> (well, iirc, there is a bug in esound alsa output.  the command-line
>  option is never passed as the device...)

I tried esd -d plughw:0,0 and it worked over here.  Is it more proper to
communicate to alsa through plughw rather than hw?  It sounds like this
interface is the smarter way to go...  I'm hesitating before suggesting 
this to esound or mplayer since I'd rather not suggest something wrong.

Thanks for helping me with this problem.  My system's working great now. 
:)

-Albert



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Re: ppc usb-audio problems

[Tom Prado]

I had shot some emails around with the esound maintainers regarding using 
plughw:# instead of hw:# as the default device and it was decided to leave 
it at hw:#.  I'd prefer it to be plughw as well. 

In the meantime, if you need plughw:# to make you card work, just 
put it in the spawn options in /etc/esd.conf (or /etc/esd/esd.conf depending on 
dist)

Tom Prado




On Sat, 12 Oct 2002, Albert Jongkit Wong wrote:

> Hello,
> 
> > ah, perhaps xmms alsa plugin doesn't care the endianess.
> > if so, it's a bug of alsa output plugin.
> 
> I started hacking at the code.  It looks like the xmms alsa plugin is fine 
> (if a bit messy).  However, it looks like their mpg123 input plugin is 
> always output big-endian data even when it says it is outputing the native 
> format data...hrm...  I'm not sure if that was intentional or not.  In 
> either case, it's their bug so I'm bugging them about it now.
>  
> > hmm, most likely the same reason.
> > esd requests big-endian formats (as native machine format), which are
> > not supported on usb devices.
> > try to use the pcm 'plughw:0,0' instead of 'hw:0,0'.
> > (well, iirc, there is a bug in esound alsa output.  the command-line
> >  option is never passed as the device...)
> 
> I tried esd -d plughw:0,0 and it worked over here.  Is it more proper to
> communicate to alsa through plughw rather than hw?  It sounds like this
> interface is the smarter way to go...  I'm hesitating before suggesting 
> this to esound or mplayer since I'd rather not suggest something wrong.
> 
> Thanks for helping me with this problem.  My system's working great now. 
> :)
> 
> -Albert
> 
> 
> 
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> Alsa-devel mailing list
> Alsa-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/alsa-devel
> 




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