For sound engineers this article discusses habits that might seem quirky, but belong to some great audio mixers. Self distracting while listening to a music track but still maintaining level of attention prevents the mixer from overly changing things, but still allows them to catch actual problems. Taking a regular break is also important for this task of intense concentration.
An interesting read:
The Quirky Habits of Great Mixers
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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?