Can I apply more than one Smart Noise Filter at once? No. You can only apply one Smart Noise Filter at at a time. Related articles Can I control Real-World Volume and use a Smart Noise Filter at the same time? What does the equalizer in the Live Mix section of the app do? What do the effects in the Live Mix section of the app do? How do I use Touch Controls on Here One? What can I do with them? What is ‘Layered Listening™’?