Travis of silverlakestudio.com writes aboutthe ideal way to record drums which is in a high ceilinged room with wide open space but not everyone can afford the luxury. It’s not all about isolation, here are some good points to consider: Set up in a spot with few reflection points, sound proof appropriately and think of who is listening; decide if you want to be a jam band or what. Fix key issues that may arise and be flexible.
Some good points in isolating drum recording techniques. Read in full here:
Isolating Drums in the Studio: 5 Things to Consider
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I’m seeking info for sanctuary reverberation absorbsion material ( panels) and best placement.
There may be apps that do that. You can definitely find spectrum analyzers that will measure ultra low.
Is there an APP that can measure the ultra low frequency levels?