Gryzor - How to select sound?

[n00b]

Referring to Contrapedia in Gryzor one can switch between audio or FX output. But how can this be done? Is there a key combination or something similar?

Thanks

[TotO]

Not sure to remember well...
Should be the ESC key from the main screen.

[n00b]

Yes, here we go! THX! 

[Gryzor]

Apart from the fact that right now for some reason I got the Commando tune stuck in my head, I remember discovering it by accident back then... quite surprised. Pity there's no combo mode!

[TotO]

I suppose that was printed into the user manual... Provided when you bought a game. 

I have put two fast AY compatible ICs on the PlayCity to allow to play sound and sfx at the same time.
It just require that some peoples provide games patch... 

[Gryzor]

That must sound nice... looking forward to a video if this gets done