Re: GnuRadio 3.10 - Audio sink under Linux does not support stereo

-----BEGIN PGP SIGNATURE-----
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=9j6j
-----END PGP SIGNATURE-----
On 7/4/24 07:11, Gary Schafer wrote:
>
> Perhaps if you shared your flowgraph?
>
> Gary

I've created about the simplest flow graph possible to demonstrate the
issue (attached).

Here's the output.


<<< Welcome to GNU Radio Companion 3.10.9.2 >>>

Block paths:
    ~/.grc_gnuradio
    /usr/share/gnuradio/grc/blocks

Generating: "/tmp/default.py"

Generating: "/tmp/default.py"

Executing: /usr/bin/python3 -u /tmp/default.py


(python3:203156): dbind-WARNING **: 07:40:33.655: Couldn't connect to
accessibility bus: Failed to connect to socket
/root/.cache/at-spi/bus_0.0: Permission denied
audio_alsa_source :error: [pulse]: set_channels failed: Invalid argument
Traceback (most recent call last):
  File "/tmp/default.py", line 121, in <module>
    main()
  File "/tmp/default.py", line 101, in main
    tb.start()
  File "/usr/lib/python3/dist-packages/gnuradio/gr/top_block.py", line
116, in start
    top_block_start_unlocked(self._impl, max_noutput_items)
RuntimeError: check topology failed on audio_alsa_source(1) using
ninputs=0, noutputs=2

>>> Done (return code 1)