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Re: ALSAPulseAudio procedure

From: Ryan Volz
Subject: Re: ALSAPulseAudio procedure
Date: Wed, 1 Jul 2020 13:31:15 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0

Hi Barry,

I don't know too much about ALSA or PulseAudio, but I do know that the part of 
the wiki that you cited is for setting up an ALSA source that grabs whatever is 
playing through PulseAudio. It is *not* something that you can use for an audio 
sink, only an audio source, which I think is why that didn't work for you.

If anything, then, I'd say that the wiki entry is a bit misleading to frame 
that discussion as a "problem" and "solution". It's really just a how-to for 
creating an audio source for the sounds that the system is producing elsewhere.

The problem you're having with audio underruns is probably pretty common and 
likely would merit a wiki entry in the "problem" and "solution" style. 
Unfortunately, I don't have much help for you there since you're already 
avoiding PulseAudio and having ALSA talk to the sound card directly.


On 7/1/20 8:43 AM, Barry Duggan wrote:
> Hi Cinaed,
> Thank you for your response. Yes, I have tried those and the 
> "hw:CARD=Generic,DEV=0" works well for most flowgraphs. I obtained that from 
> the 'aplay -L' command.
> Let me reiterate my request: In exploring the audio problems, I followed the 
> instructions in 
> https://wiki.gnuradio.org/index.php/ALSAPulseAudio#Monitoring_the_output_of_your_system
>  and it gave the error I cited. So what I want to know is: Did I do something 
> wrong, or is the procedure not correct?
> I need someone who is familiar with the ALSA and PulseAudio software to look 
> at this.
> Thanks.

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