Roland electronic drums have this choke thing, that when you squeeze/hold de edge of the cymbal pad it mutes the cymbal sound. While it works great on their modules, I can´t seen to make it work with equipment connected via it´s MIDI out (for example, Battery 3). Any ideas? On Roland site it says that the cymbal choke is a MIDI message, but it doesn´t seens to be a midi note message.
Choke operations are transmitted from the TD-series modules MIDI OUT jack as Polyphonic Key Pressure messages on the MIDI channel assigned to the drum kit part. When you press the rim of a cymbal pad, a message with the value of 7FH is transmitted. When you release the rim, a message with the value of 00H is transmitted.
These messages are sent along with the MIDI Note Number that is assigned to the head and rim of the cymbal pad.