There are many resources out there discussing about recording levels. Personally I still encounter many recordings I received from other engineers or producers that were recorded either way too hot (more often) or too soft. For anyone who wants to record well and maintain a good healthy signal between the headroom and noise floor, you need to remember this: In my opinion, the best practice will be keeping your PEAK level of the individual track to +/-3dBfs within -20dBfs in y