FOF Choir

FOF Choir


I came across a CD-ROM with Csound files, containing a choir imitation using granular synthesis, which I used more than 15 years ago in a project. Csound is a powerful sound and music programming system. Csound’s FOF opcode produces sinusoid bursts useful for formant and granular synthesisis, loosely based on IRCAM’s CHANT program. Each FOF produces a single formant, and the summed output of four (or more) produces a vowel imitation.

The FOF Choir – Basic – instrument produces the 5 vowels (a, e, i o, u) which can also be used in a random fashion.

The FOF Choir – Vowel Morphing – instrument produces slow morphing textures, each note has its own permutation of 4 vowels. There are two round-robins for each note, to obtain a even more less-repeating texture.

Both instruments are available in Kontakt 6 and in DecentSampler format (split into 7 instruments: 5 individual vowels, random vowel, vowel morphing)
Developed in CSound 6.15, Kontakt 6, DecentSampler
Demo to get an impression:


Leave a review to let others know what you thought of the instrument!

Three extra stars for uploading and preserving sampling history

4.0 rating
June 15, 2021

Oh dear… oh, these samples… I still use certain patches from mid-2000s hardware romplers so I’m not very picky about realism – sometimes it’s the tone of the samples and how you play and program them that matters more.
Now, these samples… they are a conundrum because they lack both tone AND realism. They are sterile and digital. They are just terrible and not even in a redeeming atmospheric way or even cheesy way like some classic samples are. Though I do admit to laughing, but simply because I thought my ears were fooling me.
But of course it is easy to understand why these samples are the way they are: these are samples of a physical model from nearly two decades ago. Physical modelling has come a long way since then and it’s still struggling with realistic human voices (see for example a VSTi called Jussi: very beautiful but at the same time very odd). I like everything else from Peter (especially his cajon) and I thank him for uploading these as a piece of sampling history and my ears thank me for deleting these samples so they never have to listen to them again. Think of them as a curiosity.



A choir built from formant and granular synthesis

4.0 rating
4 out of 5 stars (based on 1 review)
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