Got my sample hack for Seibu SPI running again from scratch after leaving it for some time, and have run into one last annoying hurdle - when writing to flash on first run (the infamous 999 countdown timer) *something* is triggering a small jingle to play. Any interruptions to what's being passed through the fifo/z80 system leads to errors. I attempted using what I knew the game passed as stop commands for music but that didn't work.
Is there a way to call a device directly to switch off volume in MAME like perhaps a machine().device("ymf271").mute()? I'm thinking there must be a simpler way to intercept or otherwise render the annoying poorly-emulated jingle unaudible, but I'm having trouble finding any kind of example for it. Someone suggested some esq device in MESS ages ago but I couldn't make any sense of it at the time.
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Setting sound chip volume off within the driver?
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