[pulseaudio-tickets] [Bug 79280] loading alsa-sinks including ladspa-filters fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79280

--- Comment #2 from Raymond <superquad.vortex2 at gmail.com> ---
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;
    }

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