12 Feb
2015
12 Feb
'15
5:06 p.m.
Hi all,
Today I implemented bandlimited wavetables in Pd vanilla using the idea behind mipmapping in OpenGL (ie, generate many filtered and downsampled versions of a source, use the most appropriate version(s) by a function of the derivative of the lookup index).
More info and full source (quick start tutorial: bl-example.pd):
https://gitorious.org/maximus/pd-bl
License: same as Pd vanilla.
Advantages over other implementations:
- Can generate wavetables from any waveform stored in a table.
Disadvantages:
- The higher harmonics are reduced compared to an optimal method.