Re: [frogs] chord-name-engraver plus capo

[Carl Sorensen <c_sorensen@xxxxxxx>]

On 8/28/10 1:39 PM, "Neil Puttock" <n.puttock@xxxxxxxxx> wrote:

> On 28 August 2010 19:02, Carl Sorensen <c_sorensen@xxxxxxx> wrote:
> 
>> Why not just define a C++ function
>> 
>> transpose_pitch (int semitones)
>> 
>>  return Pitch (0, - int (semitones / 2), - (semitones mod 2));
>> 
>> 
>> to handle the transposition?  Or perhaps even make this part of the
>> Pitch class -- i.e. add a transposed_semitones function to Pitch, so then
>> you could just call p->transposed_semitones (capo)?
> 
> The tranposition is subjective (it's mainly flat, but goes sharp for F
> and C), so that wouldn't be possible without also telling the function
> how to behave for certain tranpositions.

Yes, but I suspect that this is probably not correct at all for most chords..
It's defined for a C chord, but probably won't work correctly for any other
chords in the key of C.

Thanks,

Carl


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