On Sat, Jul 13, 2013 at 5:32 PM, Fons Adriaensen <fons@linuxaudio.org> wrote:
> This could be done very efficiently, in particular if you accept some
> compromises for the lowpass filter, and even more if the waveforms can
> be summed before downsampling.

Good idea, I wouldn't have thought of summing before downsampling.