Everything is great but there is no audio output from the SOX process

[Sap333]

All sound device appear and seem to work properly once Lirebird is enabled. SOX process also starts.
But there is no output on Lirebird's monitor device.
In the system mixer I see input on "SOX input" input device and nothing on the output device.

Ubuntu 23.04
Python 3 => Python 3.11.4 (the default version for this release).
Lyrebird 1.2.0 was installed from a DEB-file.

[ddan39]

this is because of a bug currently where sox is run with "-vol 0" argument, that does just that, sets the volume to 0. see my pull request #138 for that bug fix, and another.

[Sap333]

Yeap. Seems like you are right. I am just suprised that no one even tested the release with such a silly bug.

[develroo]

I am not sure it is related to that in my case as I am on Debian testing.

Python 3.11.6
libpipewire 0.3.85
libpulse 16.1.0

Try as I might I cannot get any sound out of lyrebird. I see the input go in but nothing seems to come out of sox to be passed down the chain.

This is how it looks in qpwgraph. I think I am doing it all correctly?

Tell a lie. It might be related though, as I am on Debian not sure why this is the default. I did an strace and captured this.

lyrebird-debug.txt.885199:execve("/usr/bin/sox", ["sox", "--buffer", "17", "-q", "-t", "pulseaudio", "default", "-t", "pulseaudio", "Lyrebird-Output", "pitch", "250.0", "vol", "0", "downsample", "1"], 0x7ffc6c78d498 /* 55 vars */) = 0

[Sap333]

The whole thing looks pretty much broken. It creates loops.

[ddan39]

@develroo Look at my reply above. As you can see in the strace exec you found, sox is being run with "vol 0" which sets the volume to absolute 0.

[Sap333]

ddan39 I tryied you patch and it helped a lot but didn't solve the problem. Lyrebird creates loops everytime it enables or changes configuiration.

[ddan39]

@Sap333 I'm not sure what you mean. I believe lyrebird is supposed to create loops, that's how it redirects the audio around. I don't run ubuntu though, so I won't be much help getting it to work on your system. I made my own PKGBUILD for archlinux, with my patches, and it works for me.