[sinusoidality~] is an extern for Pd by David Medine released under the GPL. It attempts to separate the 'sinusoidal' content from the 'noisy' content of a spectrum. It then resynthesizes these components. The assumption is that noise is the correct non-sinusoidal part of the signal, but you can resynthesize this part of the spectrum with any signal, not just noise, leading to potentialy interesting results.

building:
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Linux:
Rename the drop sinusoidality_tilde into Pd's extra folder. Then hit 

> make

on the command line. Alternatively, you can put the folder anywhere and then specify the include path (needed to find m_pd.h) by typing:

> make PDPATH=<full path to pd's src folder>

where the full path is something like /home/dmedine/Software/pd-0.45-4/src 

Mac:
You will need to change the fourth line of the makefile from:

current: pd_linux

to:

current: pd_darwin

then, it's the same as for linux. The makefile uses the same variable PDPATH for both linux and mac build options, so the same deal applies.

installing:
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You will also need to tell Pd where the extern is. If it is in the extra folder, you should be fine just by renaming the folder from 'sinusoidality_tilde' to 'sinusoidality~', otherwise you will need to add the path to Pd's path list, or declare the path using the [declare] object with the -path flag and the path to phasevoc~.pd_linux.