[Bug 796354] wasapi: playback noise

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796354

--- Comment #7 from Nirbheek Chauhan <nirbheek.chauhan at gmail.com> ---
(In reply to Christoph Reiter (lazka) from comment #3)
> 0:00:00.680947332  4796    5d758d0 INFO     wasapi
> gstwasapiutil.c:854:gst_wasapi_util_initialize_audioclient:<wasapisink0>
> wasapi default period: 101587, min period: 30000
> 0:00:00.702882230  4796    5d758d0 INFO wasapisink
> gstwasapisink.c:501:gst_wasapi_sink_prepare:<wasapisink0> buffer size is
> 8820 frames, device period is 447 frames, bpf is 8 bytes, rate is 44100 Hz
> 0:00:00.702945133  4796    5d758d0 INFO wasapisink
> gstwasapisink.c:510:gst_wasapi_sink_prepare:<wasapisink0> segsize is 3576,
> segtotal is 19

Okay, so the configured buffer size is quite large, and there should be more
than enough time for the plugin to deliver buffers to the OS and for the OS to
pass it on to the sound card.

Can you try playing something with Audacity with the WASAPI backend and see if
that works fine or also crackles?


(In reply to Christoph Reiter (lazka) from comment #6)
> Maybe my gst-launch-1.0 example from above is reproducible on other machines
> if someone else wants to :)

I tested that gst-launch example (with and without low-latency=true) on Windows
7 (VM), 8.1, and 10 (VM and real). It worked perfectly.

I was able to get crackling/noise on Windows 7 with low-latency=true if I
reduced the number of CPUs available to just 1, but I figured that was because
of insufficient CPU availability.

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