Yes, they are not installed. which one you prefer, or could be more stable?

On Wed, Dec 11, 2019 at 3:03 PM IOhannes m zmoelnig <zmoelnig@iem.at> wrote:

On 11.12.19 13:18, Csaba Láng wrote:
> Dear list,
>
> I am trying to play video with synced audio on HDMI output, but after 10-15
> seconds Pd dies with an error:
>
> pd: pcm.c:1168: snd_pcm_prepare: Assertion `pcm' failed.
> Pd: signal 6
> Can you help me to fix this issue?
>
> Ubuntu 18.04 with ALSA

have you tried JACK?
and PulseAudio via portaudio?

fvamsdr
IOhannes

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