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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - loading alsa-sinks including ladspa-filters fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79280#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - loading alsa-sinks including ladspa-filters fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79280">bug 79280</a>
from <span class="vcard"><a class="email" href="mailto:superquad.vortex2@gmail.com" title="Raymond <superquad.vortex2@gmail.com>"> <span class="fn">Raymond</span></a>
</span></b>
<pre>how about
aplay -v --disable-format -D upmixplug foo.wav
I: [pulseaudio] (alsa-lib)pcm_params.c: Slave PCM not usable
for error message you need to complie alsa-lib with
#if 1
#define RULES_DEBUG
#endif
in alsa-lib/src/pcm/pcm_params.c
seem err in sprepare
err = sprepare(pcm, &sparams);
if (err < 0) {
SNDERR("Slave PCM not usable");
return err;
}</pre>
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