I am tracing aloop execution and the choppy audio happens when an application (capture or playback) opens the device while another one is capturing or playing. It seems to me, I may be completely wrong, that the problem could be a synchronization issue (a critical region with no mutexes, for instance). I analysed the sound wave with Audacity while in choppy audio condition and I realized that there are silent gaps, miliseconds with no sound at all (as if some buffer pointer was lost, for example). I haven't received any answer from you =(What do you think that is happening? Thanks in advance. Gustavo da Silva Serra escreveu:> I have been trying for many weeks to solve this problem, but with no > success. After updating to Alsa 1.0.17, which include changes to aloop, > I still have choppy audio. I will try to summarize what happens:>> - I need to use aloop, if I change to a sound card all the problems are > gone;> - After some time of continuous play, applications start to reproduce > choppy audio. Choppy audio doesn't happens all the time;> - If I repeatedly start and stop my sound capture application choppy > audio occur sooner;> - Start/stop my application restores the sound quality (after some tryies);> - This happens with ALSA applications (xine, vlc) and OSS emulated;> - I have tryied many period_size and buffer_size in asound.conf, now I > am using 960 for period and 3840 for buffer. As I decrease period size, > the audio quality improves, but choppy audio still happens;> - I test for overrun but no errors occur.> - I am using block mode, interleaved, 44100, 16 bit, 2 channels> - I am using dmix, dsnoop, removing them does not correct the audio>> These are some of the information I have, I don't know if is is enough. > If necessary I can provide any other information.> What do you suggest that I do? Are there any known issues or > configuration requirements?>> Thanks in advance.> _______________________________________________> Alsa-devel mailing list> Alsa-devel@xxxxxxxxxxxxxxxx> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel>> __________ NOD32 3191 (20080616) Information __________>> This message was checked by NOD32 antivirus system.> http://www.eset.com>>>> -- Gustavo da Silva Serra gustavo.serra@xxxxxxxxxx———————————————————————————Tools & Technologies - T&T Engenheiros Associados Ltda.Projetos de SW & HW - Desenvolvendo soluções.Rua Riachuelo, 1098 Conj. 1204Centro - Porto Alegre - CEP 90010-272Fone DDR: (51)3220-3290Fone/Fax: (51)3220-3220 / 3220-3206http://www.tet.com.br/ tet@xxxxxxxxxx _______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel
