Python CLI has lots of underrun issues

[andrewfer000]

Hi, so I decided to mess with the python cli and there is a problem. A pretty nasty one too.

This message will pop up
ALSA lib pcm.c:8526:(snd_pcm_recover) underrun occurred

The audio will become clickly and bad even when the signal is strong and the C program works fine. Can a python pro that is a part of this project help figure this out? It is also what is causing this issue on nrsc5-gui so if the cli code could be fixed I can likely just use that in this program and boom! problem solved! So let's fix this!

[argilo]

This stems from the fact that nrsc5 outputs audio as soon as it is able, rather than buffering & delaying it as real receivers do (to synchronize the analog & digital signals, among other purposes). The C version of the code works around this by inserting silence at the start of the audio, but this is not ideal. I think nrsc5 should implement delay as specified in the NRSC-5 standard.