@mitu

Great thanks. It is ok. As I said forgot the '&' at the end. Still do not know why 'DMIX' option gives no sound and the 'Sysdefault' option does.

Took some time and feels that it was a lot easier in the end. That's always when you find out how it works properly.

Finally have some results...

Working on trying to get Munt working on a Pi5.

I was able to compile switching the flags around a little. I used "-mtune=cortex-a76" and "-march=armv8.2-a+crc", and I had to remove the "-mfpu=neon-fp-armv8 -mfloat-abi=hard" instructions.

I installed it and got everything setup, but on boot, the Pi complains that "rc.local[1023]: Could not open pcm device: default" and "rc.local[1023]: mt32d: pcm.c:1226: snd_pcm_prepare: Assertion 'pcm' failed."

Any ideas?

The post [Tutorial] Installing Munt (MT-32 emulation) on RPi 3 might be interesting regarding this topic.