SDIF is a wiiiide (and open) format and includes all kind of stuff; sinusoid models and spectral data is only two out of ten or so possibilities.
only via detours you can still find some of the old apps supporting it (in the sense of creatively abusing it for PCM audio, which it was not made for first in line)
diphone, supervp and audiosculpt are gone, the ones which are still available are spear, csound, matlab and some commandline utility.
for max/msp, i remember people using FTM objects to export such data (but i have no experience with it and i am not sure if there is actually an analysis and transforming algo for SDIF included.)
Thanks for the reply! Such a shame, this kinda gets in the way of me using it.
I don't necessarily need an SDIF. What I really need is a list of frequency, amp, decay rate triples of chosen audio file to send to the resonator object. Unfortunately I can't seem to find a way to get those triples. Only frequency and amp is possible. Anyone any bright ideas?
I believe it is not included in the standard CNMAT Externals package.
Spectral Tutorials (which sin-to-res is part of) are part of the CNMAT MMJ Depot package: https://github.com/CNMAT/CNMAT-MMJ-Depot/archive/master.zip