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rncbc's picture

not exactly,

but a maximum MIDI CC value of 127 should equal 0dBfs and a minimum of 0 to -inf(inity)dBfs (< -70dBfs on qtractor's meter display); to be exact, it's a non-linear conversion scale (logarithmic/exponential); for performance reasons, it's implementation follows a cubic approximation or a piece-wise linear standard curve (cf. IEC_Scale in qtractorAudioMeter.cpp).

byee