SPECCHORD imposes transposed versions of the sound onto the original frequencies. MODES 1. Harmonise: make chord preserving time but not spectral envelope. 2. Chord with formants (freq): make chord preserving formants extracted by frequency. 3. Chord with formants (pitch): make chord preserving formants extracted by pitch. PARAMETERS transpose: Textfile of transposition values in semitones Range: -48 to +48 semitones [low freq]: filter out all frequencies lower than this Range: 20-20 kHz [high freq]: filter out all frequencies higher than this Range: 20-20kHz [channels]: No. of frequency channels per point used to extract spectral contour Range: 1-100 (fewer is more accurate) [bands]: No. of pitch bands per octave used to extract spectral contour Range: 1-12 (greater is more accurate) OPTION: • Fuller spectrum NOTES The aural results are not the same as you get with STACK or TRANSPOSE. SpecChord appears to duplicate just the spectral frequency content, whereas each TRANSPOSE has a separate spectral envelope (dynamic contour).
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