8 Oct
2014
8 Oct
'14
2:36 p.m.
Phil CM <philcm(a)gnu.org> wrote:
> Now the only think that is left is a portamento function, to go from
> one note to another (/exactly/ like so-404
> <http://d00m.org/%7Esomeone/so404/> does).
> Does anyone know the algorithm to implement that?
That would really
> help me.
Quoting Philipp Überbacher <murks(a)tuxfamily.org>rg>:
I have never done this but I suggest to look at the
calf monosynth
code. AFAIR it has a couple of different ways to handle
successive/overlapping notes.
Another synth that comes to mind and has portamento is phasex.
Well, if it has to be exactly the same, I'd suggest digging in the
so-404 code and not in those other synths. Looks like it adjusts
frequency at samplerate/100, calculating:
freq = ((portamento/127.0)*0.9)*freq + (1.0-((portamento/127.0)*0.9))*tfreq;
I guess tfreq is the target frequency of the note being portamented towards.
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