Re: [Discuss-gnuradio] unable to get sound from alsa sink

[Michael Dickens]

Just FYI that ALSA is Linux-specific.

Chris: Did you verify that audio output is working at all on your system? If 
so, then have you worked out why it's not working in your flowgraph? If not, 
let us know of any changes to it since you posted last & we'll see what we can 
do. - MLD

On Mon, Aug 26, 2019, at 9:38 AM, Barry Duggan wrote:
> Hi Chris,
> 
> You didn't mention your OS or your platform, but this works for a Linux 
> system:
> 
> Using a terminal screen, enter 'aplay -L'
> 
> Here is an excerpt from my Raspberry Pi:
> 
> """
> default:CARD=ALSA
>      bcm2835 ALSA, bcm2835 ALSA
>      Default Audio Device
> hw:CARD=ALSA,DEV=1
>      bcm2835 ALSA, bcm2835 IEC958/HDMI
>      Direct hardware device without any conversions
> hw:CARD=Device,DEV=0
>      USB Audio Device, USB Audio
>      Direct hardware device without any conversions
> """
> 
> The Pi has a headphone jack, an HDMI port, and I have a USB audio 
> dongle. What you need to do is pick the appropriate entry for your 
> system, and the enter the Device Name in the Audio Sink properties. For 
> example, I use "hw:CARD=ALSA,DEV=1" to get sound on my monitor.
> 
> On Windows or Mac, you might just enter "default:CARD=ALSA".
> 
> Good luck,
> -- 
> Barry Duggan