[PD] [PD]spatialization : filter problems

[julien.breval at tremplin-utc.net]

> *About (classic) low/high shelving
> I need this for my patch
> I have programmed low and high shelving abstractions, using hip~ and lop~,
> but
> these are quite complicated (difficult to add or remove some frequencies
> with
> the SAME parameter)

this latter problem was solved using this technique : adding +~ 1 to the signal 
before processing and -~ 1 after processing
therefore all the sound processing is done with positive-value signals, so it's 
easy to add or substract some frequencies to the signal