I’m trying to build a patch that simulates a trumpet valve system or an EVI (Electronic Valve Instrument), where I can access all seven possible combinations of three valves (v1, v1+v2, v1+v3, etc.).

I can’t use the expr object because I’ll be flashing the patch to a Daisy Seed. I’ve been experimenting with spigot, but I’m stuck and having trouble handling all the condition logic (for example, preventing the v1 output from triggering when v1+v2 are pressed).

Does anyone have ideas on how to work around this?

Thanks!

Hi @ytt
Maybe like midi note pairs
set-valves.pd

We have added expr and expr~ support this month and it should come to the plugdata toolchain shortly!

@ytt +1 to @Balwyn's idea, but I thought you were asking about how to eliminate the race condition whenever 2 or more valves are pressed at the same time.
trumpet valve control.pd

Edit: hmm, I probably overcomplicated things with the list tosymbol test. Maybe I should have converted the valve triplet to a number right away and then tested that instead.

@jameslo A lot of the objects you are using are not supported by the Heavy Compiler -> https://wasted-audio.github.io/hvcc/docs/09.supported_vanilla_objects.html

@dreamer Oh! My bad. My post was probably made irrelevant by your previous post anyway.

Thanks for your replies.
@dreamer It’s good to know that exp and expr~ will soon be available in hvcc.

@Balwyn I think the condition operation is missing in your patch, as jameslo pointed out.

@jameslo Your patch does work, but for this project I was hoping to avoid using MIDI and instead assign the output directly to specific notes, so I can easily use a fourth trigger for quarter-tones. That said, I can’t use this patch for Daisy anyway. I’m still trying to get spigot working, but I haven’t had any success yet.