lucnijs

I'm currently using sigmund as a pitch tracker in an application that makes it possible to draw something on a screen by playing a musical instrument.

The amplitude that comes out from the object sigmund~ is mapped to the"stroke" (thickness) of the line that is drawn.

Unfortunately, when playing crescendo, the thickness of the line is not realistic: a lot of crescendo doesn't make the line a lot thicker.

I should do some scaling probably. However, just multiplying it by e.g. 1.02 doesn' make the thickening gradual enough. Maybe I should use a "sone scale"? Other ideas?

I'm currently using sigmund as a pitch tracker in an application that makes it possible to draw something on a screen by playing a musical instrument.
The amplitude that comes out from the object sigmund~ is mapped to the"stroke" (thickness) of the line that is drawn.
Unfortunately, when playing crescendo, the thickness of the line is not realistic: a lot of crescendo doesn't make the line a lot thicker.
I should do some scaling probably. However, just multiplying it by e.g. 1.02 doesn' make the thickening gradual enough. Maybe I should use a "sone scale"? Other ideas?
I hope somebody can help me with this...
Thanks a lot!
Luc


pitch-tracking-with-sigmund-crescendo

You might want to try simply using the decibel scale. Are you looking at the direct amplitude of the audio signal coming in (with something like avg~ or average~ or peakamp~) or are you looking at the amplitude output of sigmund~ (which I think is already converted to a decibel-like scale)? If the former, take a look at the atodb (or atodb~) object. Once you convert from linear amplitude to decibels, whether by atodb or by sigmund~, you can then find the range within which the instrument most commonly plays, and map that to the range of line thicknesses you want.

At this moment we are using the amplitude output of sigmund~. But we are thinking to introduce a parallel circuit now using your first option.

Probably we'll have to make some presets according to which instrument is used and then do what you suggested.

Hey Christopher,
thanks for your reply!
At this moment we are using the amplitude output of sigmund~. But we are thinking to introduce a parallel circuit now using your first option.
Probably we'll have to make some presets according to which instrument is used and then do what you suggested.
Thanks!!

pitch tracking with sigmund + crescendo