Re: Tips on debugging ALSA driver snd_es18xx

[Paulo Marcel Coelho Aragao <pmcaragao-ag@yahoo.com>]

Clemens Ladisch wrote on Dec, 15:
> > I recently switched from OSS to ALSA and I'm baffled by this: aplay 
> > produces
> > sound when playing wav files, but gxine and xmms produce no sound when
> > playing streaming audio.
> 
> What are the contents of /proc/asound/card0/pcm0p/sub0/hw_params and sw_params
> in either case?

Hey, this is interesting. Thanks for answering. I'm not clear about what this 
means but it feels pointing to a promising direction.

This was curious: the wav files I tried with aplay ended too quickly, so I 
looked for longer ones. My surprise: no sound from the longer ones. It gave me 
the impression to be related to the sound source being coded for 16 or 8-bits, 
if I'm not speaking just plain nonsense. I ran aplay -v which seemed to 
display the same info you asked.

Thanks, Clemens, for taking the time with my predicament
Paulo

PS: Would have at hand a reference to some document that describes 
/proc/asound ?

[SOUND]

aplay -v /usr/share/sounds/KDE_Beep_Honk.wav
--------------------------------------------
Playing WAVE '/usr/share/sounds/KDE_Beep_Honk.wav' : Unsigned 8 bit, Rate 
11127 Hz, Mono
Plug PCM: Rate conversion PCM (11130, sformat=U8)
Its setup is:
stream       : PLAYBACK
access       : RW_INTERLEAVED
format       : U8
subformat    : STD
channels     : 1
rate         : 11127
exact rate   : 11127 (11127/1)
msbits       : 8
buffer_size  : 5564
period_size  : 1391
period_time  : 124977
tick_time    : 1000
tstamp_mode  : NONE
period_step  : 1
sleep_min    : 0
avail_min    : 1391
xfer_align   : 1391
start_threshold  : 5564
stop_threshold   : 5564
silence_threshold: 0
silence_size : 0
boundary     : 1458569216
Slave: Hardware PCM card 0 'ESS AudioDrive ES1879' device 0 subdevice 0

Its setup is:
stream       : PLAYBACK
access       : MMAP_INTERLEAVED
format       : U8
subformat    : STD
channels     : 1
rate         : 11130
exact rate   : 11130.4 (768000/69)
msbits       : 8
buffer_size  : 5567
period_size  : 1391
period_time  : 124977
tick_time    : 1000
tstamp_mode  : NONE
period_step  : 1
sleep_min    : 0
avail_min    : 1391
xfer_align   : 1391
start_threshold  : 5564
stop_threshold   : 5567
silence_threshold: 0
silence_size : 0
boundary     : 1459355648

[NO SOUND]

gxine rtsp://128.59.222.11:554/broadcast/wkcr.rm?cloakport=80,554,7070
----------------------------------------------------------------------
/proc/asound/card0/pcm0p/sub0/hw_params
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (793800/18)
period_size: 2048
buffer_size: 16384
tick_time: 1000

/proc/asound/card0/pcm0p/sub0/sw_params
tstamp_mode: NONE
period_step: 1
sleep_min: 0
avail_min: 2048
xfer_align: 1
start_threshold: 2048
stop_threshold: 16384
silence_threshold: 0
silence_size: 0
boundary: 1073741824

xmms http://64.236.34.67:80/stream/1018
---------------------------------------
/proc/asound/card0/pcm0p/sub0/hw_params
access: RW_INTERLEAVED
format: S16_LE
subformat: STD
channels: 2
rate: 44100 (793800/18)
period_size: 2205
buffer_size: 16384
tick_time: 1000

/proc/asound/card0/pcm0p/sub0/sw_params
tstamp_mode: NONE
period_step: 1
sleep_min: 0
avail_min: 2205
xfer_align: 2205
start_threshold: 14179
stop_threshold: 16384
silence_threshold: 0
silence_size: 0
boundary: 1073741824

aplay -v /usr/share/sounds/alsa/Front_Right.wav
-----------------------------------------------
Playing WAVE '/usr/share/sounds/alsa/Front_Right.wav' : Signed 16 bit Little 
Endian, Rate 48000 Hz, Mono
Plug PCM: Hardware PCM card 0 'ESS AudioDrive ES1879' device 0 subdevice 0

Its setup is:
stream       : PLAYBACK
access       : RW_INTERLEAVED
format       : S16_LE
subformat    : STD
channels     : 1
rate         : 48000
exact rate   : 48000 (768000/16)
msbits       : 16
buffer_size  : 24000
period_size  : 6000
period_time  : 125000
tick_time    : 1000
tstamp_mode  : NONE
period_step  : 1
sleep_min    : 0
avail_min    : 6000
xfer_align   : 6000
start_threshold  : 24000
stop_threshold   : 24000
silence_threshold: 0
silence_size : 0
boundary     : 1572864000


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