Unsuccessfully loading synthdef into Sonic Pi 3.0.1

synthdefs.md

Unsuccessfully loading synthdefs into Sonic Pi 3.0.1

I'm diving back into Sonic Pi after a long absence, and I'd like to load an old synth that was abandoned, the haunting dark_sea_horn. The Overtone definition is here; its original binary is here; and it sounds like this.

Old binary doesn't work

I downloaded the old binary linked above, ran load_synthdefs "/path/to/my/synthdefs" and attempted synth :dark_sea_horn. I get the following error:

Runtime Error: [buffer 2, line 2] - RuntimeError
Thread death!
 Unknown synth :dark_sea_horn

It works in Overtone

I copied the definition linked above and evaluated it into the Overtone REPL (overtone.live, of course). It works beautifully! (demo 12 (sonic-pi-dark_sea_horn :note 60 :sustain 10))

Saving my own binary

I had quite a bit of difficulty saving my own synthdef with the provided instructions. (In fact, it seems to be hard-coded for Sam Aaron's machine. sonic-pi.synths.core/save-synthdef also tries to save other forms I don't think I need.

So, I ended up saving my synthdef in the following way:

; evaluated a functioning (defsynth) with name sonic-pi-dark_sea_horn
(overtone.sc.machinery.synthdef/synthdef-write (:sdef sonic-pi-dark_sea_horn)
   "/path/to/sonic-pi-dark_sea_horn.scsyndef")

That successfully writes to a file the given path, which looks like a proper binary to my inexperienced eye.