start1 method
Implementation
void start1(InstrumentRegion region, int key, int velocity) {
var regionPair = RegionPair(preset: PresetRegion.defaultPresetRegion(), instrument: region);
start2(regionPair, key, velocity);
}
void start1(InstrumentRegion region, int key, int velocity) {
var regionPair = RegionPair(preset: PresetRegion.defaultPresetRegion(), instrument: region);
start2(regionPair, key, velocity);
}