I want to share this article by Bobby of bobbyowsinski.blogspot.com about a great film about audiophiles; while they were once made fun of for their obsession, they’re starting to be missed. In the ‘70s, good playback was as important as good phones are now. While technology has advanced, sound systems themselves are not as high quality as before. This movie takes a look at the lives of European audiophiles.
Looks great to me:
The Making Of An Audiophile
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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?