On Mon, 21 Jan 2019 19:07:09 +0100, Pavel Hofman wrote: > > > Dne 21. 01. 19 v 18:46 Chakravarthi Pradeep napsal(a): > > On Wed, Jan 16, 2019 at 5:07 PM Chakravarthi Pradeep <doubleq7@xxxxxxxxx> wrote: > >> > >> I have ALSA driver for capture device which works fine with VLC. when > >> I try to capture and render using own application having some issues. > >> When I start play, it has some noise in beginning and audio is > >> discontinuous in between. Discontinuous means, some audio frame are > >> getting dropped in between. cut cut sound for sine wave. I have tried > >> snd_pcm_drop and snd_pcm_drain but no use. Kindly suggest how to > >> remove the starting noise in ALSA. > > I have experienced the same issue, with ice172 driver. IMO part of the > first period when opening the stream contains samples from the > previous run. In one of my my projects I have to drop initial samples > in order to get correct and stable results from FFT analysis. > > I do not know if the problem is in the driver, alsa-lib or if the > application (in my case the SDL library) uses alsa-lib API > incorrectly. To tell the truth I did not investigate details and > "fixed" it by dropping the initial samples. It's likely a driver-specific problem, but still wondering how it happens. Does the whole first period contain the previous samples, or just a few beginning samples? Also is it on the x86 PC, or on other architecture? thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
