Re: [Discuss-gnuradio] First time user - fm radio tutorial has choppy audio

[Marcus D. Leech]

On 01/14/2015 11:28 PM, Ralph A. Schmid, dk5ras wrote:
> Hi,
>
> How would I change this, skipping PulseAudio and using Alsa? The only audio 
> application I try with gnuradio at the moment behaves similar here. I try to 
> decode DMR, and I get choppy audio although everything should be OK. I blamed 
> gr-dsd, but maybe it is a common issue. Will have to try a simple FM RX to 
> verify :)
>
> Ralph.
>
> > You almost certainly have a sample-rate mismatch somewhere in the flow--likely, 
> > your audio sink is configured for a sample-rate other than what
> > the hardware (or PulseAudio) can support.  Sometimes also, PulseAudio gets into 
> > trouble and gets all under-runny.   I'd go with Alsa direct if it
> > were my problem, and skip Pulse entirely.
One could just try dial_tone.py example.  That will exercise the audio 
subsystem.

For alsa, in the device field in the audio sink, try something like 
hw:0,0  or plughw:0,0