Hi
I'm new to ALSA and am trying to get my audio interface on a ADS5121
Rev4.0 (MPC5121e based) to work.
I'm using Kernel 2.6.24.6 with ALSA 1.0.15.
Looking at the source, the AC97 driver supports S32_BE format only.
I am now able to record and play raw data in this format like this:
$ arecord -traw -c2 -fS32_BE -Dhw:0,0 testfile
$ aplay -traw -c2 -fS32_BE -Dhw:0,0 testfile
I now expected to be able to play wav files of any format using plughw
but this is getting me this error:
$ aplay -Dplughw:0,0 test.wav
Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Mono
ALSA lib pcm_plug.c:773:(snd_pcm_plug_hw_refine_schange) Unable to find
an usable access for 'plughw:0,0'
aplay: set_params:901: Sample format non available
I'm not sure, but I expect this to be a problem of my ALSA configuration
and this is where I'm stuck.
Does anyone have a working configuration for the ads5121 or any hint on
what I'm doing wrong?
How can I convert LE wav files to S32_BE?
I tried this configuration but without success.
> pcm.mpc5121 {
> type hw
> card 0
> device 0
> }
>
> pcm_slave.sl1 {
> pcm
> format S32_BE
> channels 2
> rate 44100
> }
>
> pcm.convert {
> type plug
> slave sl1
> }
Using above configuration I get this error:
$ aplay -D convert test.wav
ALSA lib conf.c:1588:(snd_config_load1) _toplevel_:14:1:Unexpected char
ALSA lib conf.c:2849:(snd_config_hook_load) /etc/asound.conf may be old
or corrupted: consider to remove or fix it
ALSA lib conf.c:2713:(snd_config_hooks_call) function
snd_config_hook_load returned error: Invalid argument
ALSA lib conf.c:3076:(snd_config_update_r) hooks failed, removing
configuration
aplay: main:546: audio open error: Invalid argument
Many thanks
Stefan.
-----
Here some more information that may be of help:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ADS [MPC5121 ADS], device 0: AC97 AC97 HiFi-<NULL>-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
$ aplay -L
default:CARD=ADS
MPC5121 ADS,
Default Audio Device
null
Discard all samples (playback) or generate zero samples (capture)
$ cat /proc/asound/devices
0: [ 0] : control
1: : sequencer
16: [ 0- 0]: digital audio playback
24: [ 0- 0]: digital audio capture
33: : timer
$ cat /proc/asound/cards
0 [ADS ]: AC97 - MPC5121 ADS
MPC5121 ADS (AC97)
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