Using external sound system that runs via USB into Pi, works well. Looking at additional processing and with that the rPi4 would be choice, though heat issues

Using external sound system that runs via USB into Pi, works well. Looking at additional processing and with that the rPi4 would be choice, though heat issues may need addressing by all accounts and this looks like it will cut the mustard. Sure the processing I'm doing, I could batch, but real-time makes like so much better in the instance I'm using it for.