A diatonic harmonic interval occurs when two different notes of the same scale are played at the same time. For example, in a C-major scale, the C and E played together, then the D and F, and so on, is an example of a diatonic harmonic interval in thirds. For a lighter, airier sound, play a diatonic harmonic interval in sixths.
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Lesson: Sixths Sense.
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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?