The AVR S570BT code base is one of many Denon codes that the Volume is slow and as all models (I say all but its all the ones I have tried) use the same IR codes try the AVR-S670H code base (I’ve tested this one and it works as it should). As its close to your model all the features yours has should be listed (if not try another). Delete the macro you have for Long Press Volume. In an Activity Volume should be “Short Press: Volume_xx(Denon)” and “Long Press: Not Configured”.