Function libpd_sys::libpd_aftertouch

pub unsafe extern "C" fn libpd_aftertouch(
    channel: c_int, 
    value: c_int
) -> c_int

send a MIDI after touch message to [touchin] objects channel is 0-indexed and value is 0-127 channels encode MIDI ports via: libpd_channel = pd_channel + 16 * pd_port returns 0 on success or -1 if an argument is out of range