MIDI Choke

[ibanman555]

What does MegaDrum want to see in order to enable a cymbal choke? Resistance, voltage or both?

[dmitri]

On a 2/3 zone cymbal MegaDrum uses the edge switch for choking.

[ibanman555]

Right, I'm just curious what type of signal is sent to MD when a 'switch' is closed on a manufactures cymbal, I don't have one to test. My Kit Toys cymbals register a resistance of 'infinity' when open, and about 1200k when closed. Since it's not a real switch, and the circuit closes when my finger touches the two plates... this leads me to believe MD sees the change in resistance and acts accordingly. I am trying to recreate this with a capacitive touch sensor, but unfortunately it requires voltage to operate correctly.

[dmitri]

Yes, MegaDrum sees the difference in resistance (voltage in fact). On 3 zone Yamaha style cymbal MegaDrum can differentiate between the edge and the bell switches on the same edge input because the edge switch makes it via 10k resistor and the bell switch makes it with just a short.

[ibanman555]

Ok great. Since my experiments are sending voltage to the input (I didn't want to cook anything) I may get this to work based on your claims... here is to hoping...

[ibanman555]

Yes, MegaDrum sees the difference in resistance (voltage in fact). On 3 zone Yamaha style cymbal MegaDrum can differentiate between the edge and the bell switches on the same edge input because the edge switch makes it via 10k resistor and the bell switch makes it with just a short.

This is good to know also, because MD has two options I guess. I didn't know 3 way Yamaha's would work. And the 3 way Roland, however that would require two cables from the cymbal and two inputs used on MD.

My main goal is to have a 3 way (bell, bow and edge) cymbal with a touch sensor choke (a consistent circuit), only using one input on MD.

[ChrisHelvey]

What's the purpose of having both a bell switch AND an edge switch. I feel silly asking this question, but when playing, I just want all sounds from the cymbal muted. No?

[ibanman555]

Well, I think I'm confused by your statement about cymbals muting while playing, I would imagine you would want the opposite. If wired a certain way, you could use one piezo to two switches, they wouldn't trigger unless the actual switch for the bell or edge makes a connection while the piezo sends a signal at the same time.