Hi casper, i'm actually thinking about making an 8 step sequencer for my toys, because playing three toys or more alone is impossible. But when i saw your schematic (the one with the 74HC08 IC), i had a reflexion : is it possible to add more channels (mmh 6 or 8 instead of four) following the same schem ? Did you ever try ?
Sorry for bad english, i try to be at my best, lost in my french country...
Thanks for answering.