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https://github.com/cookiengineer/audacity
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57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/**********************************************************************
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Audacity: A Digital Audio Editor
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PitchName.h
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Copyright 2005-9, Vaughan Johnson and Dominic Mazzoni.
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All rights reserved.
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Utilities for converting from frequency to pitch
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and from pitch to absolute (e.g., C4 for middle C)
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or nominal (A through G#) pitch name.
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**********************************************************************/
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#ifndef __AUDACITY_PITCHNAME__
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#define __AUDACITY_PITCHNAME__
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#include <wx/defs.h>
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// FreqToMIDInoteNumber takes a frequency in Hz (exponential scale relative to
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// alphabetic pitch names) and returns a pitch ID number (linear
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// scale), such that A440 (A4) is 69, middle C (C4) is 60, etc.
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// Each register starts with C (e.g., for middle C and A440,
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// it's register 4).
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double FreqToMIDInoteNumber(double freq);
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// PitchIndex returns the [0,11] index for a double pitchNum,
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// as per result from FreqToMIDInoteNumber, corresponding to modulo 12
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// of the integer part of (pitchNum + 0.5), so 0=C, 1=C#, etc.
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unsigned int PitchIndex(double pitchNum);
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// PitchName takes pitchNum (as per result from
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// FreqToMIDInoteNumber) and returns a standard pitch/note name [C, C#, etc.).
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// Sharps are the default, unless, bWantFlats is true.
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wxChar * PitchName(double pitchNum, bool bWantFlats = false);
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// PitchName_Absolute does the same thing as PitchName, but appends
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// the register number, e.g., instead of "C" it will return "C4"
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// if the pitchNum corresonds to middle C.
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// Sharps are the default, unless, bWantFlats is true.
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wxChar * PitchName_Absolute(double pitchNum, bool bWantFlats = false);
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#endif // __AUDACITY_PITCHNAME__
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// Indentation settings for Vim and Emacs and unique identifier for Arch, a
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// version control system. Please do not modify past this point.
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//
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// Local Variables:
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// c-basic-offset: 3
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// indent-tabs-mode: nil
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// End:
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//
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// vim: et sts=3 sw=3
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// arch-tag: 1cd2b819-63b6-4051-9991-37165f236037
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