[alsa-devel] Recording support for Roland SD-50 USB Audio device

[François Isabelle]

Le 04/06/2014 09:26, Daniel Mack a écrit :
> Then some other application has control over the device, most probably 
> pulseaudio or JACK. 
> Check if prepending arecord with "pasuspender --" helps. 

You were right, but now the read seems to block..

isabellf at brahms:~/alsa-driver$ LC_ALL=C  pasuspender --  arecord 
-Dplughw:3 file.wav
Recording WAVE 'file.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
^CAborted by signal Interrupt...
arecord: pcm_read:2031: Got SIGINT, exiting.
read error: Interrupted system call

And the resulting file has no data.

isabellf at brahms:~/alsa-driver$ hexdump file.wav  -C
00000000  52 49 46 46 24 00 00 80  57 41 56 45 66 6d 74 20 
|RIFF$...WAVEfmt |
00000010  10 00 00 00 01 00 01 00  40 1f 00 00 40 1f 00 00 
|........ at ...@...|
00000020  01 00 08 00 64 61 74 61  00 00 00 80 |....data....|
0000002c
isabellf at brahms:~/alsa-driver$ ^C


François.