From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugtrack@alsa-project.org Subject: [ALSA - utils 0001990]: aplay/arecord cannot play/capture A_LAW Date: Fri, 7 Apr 2006 19:32:24 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from bugtrack.alsa-project.org (gate.perex.cz [85.132.177.35]) by alsa.jcu.cz (ALSA's E-mail Delivery System) with ESMTP id B557115C for ; Fri, 7 Apr 2006 19:32:24 +0200 (MEST) Sender: alsa-devel-admin@lists.sourceforge.net Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org A NOTE has been added to this issue. ====================================================================== ====================================================================== Reported By: Raymond Assigned To: ====================================================================== Project: ALSA - utils Issue ID: 1990 Category: aplay/arecord Reproducibility: always Severity: major Priority: normal Status: new ====================================================================== Date Submitted: 04-01-2006 04:26 CEST Last Modified: 04-07-2006 19:32 CEST ====================================================================== Summary: aplay/arecord cannot play/capture A_LAW Description: aplay/arecord can play MU_LAW and the sound card support MU_LAW and A_LAW arecord -D hw:0,0 -f MU_LAW -t au -c 1 -r 8000 test.au aplay -D hw:0,0 test.au Try to use -t raw but the quality of A_LAW is very bad when compare with MU_LAW arecord -D hw:0,0 -f A_LAW -t raw -c 1 -r 8000 test.raw aplay -D hw:0,0 test.raw ====================================================================== ---------------------------------------------------------------------- Raymond - 04-03-06 07:36 ---------------------------------------------------------------------- pcm.convert { type alaw slave { pcm "hw:0" format A_LAW } } aplay -v -Dconvert test.wav Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono A-Law conversion PCM (A_LAW) Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 1 rate : 8000 exact rate : 8000 (8000/1) msbits : 16 buffer_size : 4096 period_size : 1024 period_time : 128000 tick_time : 10000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 1024 xfer_align : 1024 start_threshold : 4096 stop_threshold : 4096 silence_threshold: 0 silence_size : 0 boundary : 1073741824 Slave: Hardware PCM card 0 'au8830' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : A_LAW subformat : STD channels : 1 rate : 8000 exact rate : 8000 (8000/1) msbits : 8 buffer_size : 4096 period_size : 1024 period_time : 128000 tick_time : 10000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 1024 xfer_align : 1024 start_threshold : 4096 stop_threshold : 4096 silence_threshold: 0 silence_size : 0 boundary : 1073741824 It seem that the plugin alaw work , the sound play at expected quality This mean that aplay/arecord only need to implement read/write the A_LAW audio in a suitable file format ---------------------------------------------------------------------- tiwai - 04-07-06 19:32 ---------------------------------------------------------------------- aplay doesn't support A-law in .au format. Issue History Date Modified Username Field Change ====================================================================== 04-01-06 04:26 Raymond New Issue 04-03-06 07:16 Raymond Note Added: 0009085 04-03-06 07:36 Raymond Note Added: 0009086 04-07-06 19:32 tiwai Note Added: 0009152 ====================================================================== ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642