A4 Kill FX (using the elektron-ctl framework)

killFX

// grab the current kit:
	
	[A4Request requestWithKeys:@[@"kit.x"]
			 completionHandler:^(NSDictionary *dict) {
				 
				 // make a copy of the kit:
				 
				 A4Kit *kitOriginal = dict[@"kit.x"];
				 A4Kit *kitCopy = [A4Kit messageWithSysexData:kitOriginal.sysexData];
				 
				 // set FX params to non-sounding values:
				 
				 [kitCopy setFxParamValue:A4PValFxMake16(A4PARAMS_FX_CHOR.FEEDBACK, 0x40, 0)];
				 [kitCopy setFxParamValue:A4PValFxMake16(A4PARAMS_FX_DELAY.FEEDBACK, 0, 0)];
				 [kitCopy setFxParamValue:A4PValFxMake16(A4PARAMS_FX_DELAY.OVERDRIVE, 0, 0)];
				 [kitCopy setFxParamValue:A4PValFxMake16(A4PARAMS_FX_REVERB.DECAY, 0, 0)];
				 
				 // send the modified kit:
				 
				 [kitCopy sendTemp];
				 
				 // wait 0.5 seconds, send the original kit:
				 
				 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
					 [kitOriginal sendTemp];
				 });
				 
			 } errorHandler:^(NSError *err) {
				 NSLog(@"crap: %@", err.description);
			 }];