-9 csound hrtf

So I tried cl-openal...and couldn't replicate the crash. I don't really remember how it was triggered. But I would assume it was an issue my other PC. Aaaanyway I wan to try this csound thing.

But before that I should mention that there are more options in the same vein than Csound.
Supercollider is also a synthesizer, multiplatform with much more nicer lisp bindings.

- https://github.com/byulparan/sc-internal/
- https://github.com/byulparan/cl-collider

And I am sure things like Faust, Chuck or others libraries have the same power https://github.com/toplap/awesome-livecoding

** Csound

First some links (again)
- https://github.com/csound/csound/tree/develop/interfaces
- https://github.com/azimut/csound (fork)
- https://github.com/azimut/cloud/
- https://github.com/rorywalsh/CsoundUnity

And some more reading that I might mention later:
- https://forum.cabbageaudio.com/c/csound-for-games
- https://forum.cabbageaudio.com/t/csoundunity-mixer-plugin/492
- https://rorywalsh.github.io/CsoundPhaser3/
- http://www.csoundjournal.com/issue9/newHRTFOpcodes.html
- http://csoundjournal.com/issue19/InterfacingCsoundUnity.html
- https://rorywalsh.github.io/CsoundUnity/docs.html

And might be an idea for a game(?
-

I shouldn't fret too much of a perfect setup because once i start using it
on a game i know it would change....

*** An advice from the past

From my experiments with "music" i know 1 thing, timing is key.
If you have a shitty scheduler you have noise. So I would leave all time
related stuff to the internal csound scheduler.

*** SFX

1) it should be able to play sounds immediatly at command
2) it should be 3d positioned and allow changes of position
3) possible change INITIAL pitch or volume for more variaty of sounds

1) easy enough with csound instrument
#+begin_src
  instr 4
    ktrans linseg  1, 5, 2, 10, -2
    a1     diskin2 \"fox.wav\", p4, p5, p6, 0, 32
           outs a1,a1
  endin
#+end_src
and cloud helper, if loop is 1 it will loop for the duration provided (3 in this case) if loop is 0 it will stop either at the end of the sound or duration
#+begin_src

(make-play fox "i4" :rate 1 :skip 0 :loop 0)
(play-fox 3 :rate .1 :loop 0)
#+end_src
2)
Some opcodes that allow provide 3d audio are
a) hrtfmove2: moving 3d binaural audio
b) hrtfstat: static 3d binaural audio, azimut and elevation based (faster to compute)
- iAz: in degrees, +right -left
- iElev: +above -below (horizon)
Problem with these is how they take they areguments...but can be calculated with opcode
- http://csoundjournal.com/issue19/InterfacingCsoundUnity.html
- http://www.csounds.com/manual/html/hrtfearly.html
c) hrtfearly:
ksrcx, ksrcy, ksrcz, klstnrx, klstnry, klstnrz - xyz source (position) and xyz listener (camera)
#+begin_src
gasrc init 0    ;global

instr 1
    a1     diskin2 "fox.wav", 1, 0, 0, 0, 32
    gasrc = a1
endin

instr 10    ;uses output from instr1 as source
  ;simple path for source
  kx line 2, p3, 9
  ;early reflections, room default 1
  aearlyl,aearlyr, irt60low, irt60high, imfp hrtfearly gasrc, kx, 5, 1, 5, 1, 1, "hrtf-44100-left.dat", "hrtf-44100-right.dat", 2
  ;later reverb, uses outputs from above
  arevl, arevr, idel hrtfreverb gasrc, irt60low, irt60high, "hrtf-44100-left.dat", "hrtf-44100-right.dat", 44100, imfp
  ;delayed and scaled
  alatel delay arevl * .1, idel
  alater delay arevr * .1, idel
  outs    aearlyl + alatel, aearlyr + alater
  gasrc = 0
endin
#+end_src
*** Fixed Music (though it could also be ambient)

1) It has to play .wav files
2) it has to loop them forever or until something tells it to stop
3) if possible crossfade to avoid clicks (but editing should help enough..might be)
4) it should be possible to fade in and out the loop at will
5) in order to support layers of sound there should be beat counter so
   some thing would happen at beat not at command.

*** Generative

1) trigger a sound or sequence of sounds on command, csound timed

*** (Early) Results
hrtearly along with hrtfreverb uses ~38% of my cpu for 1 sound. Albeit not linear the increase by adding a new sound
cpu around 45% but is a bit much. hrtfmove2 alone uses 9%.

I am compelled to use openal for positional audio, that is sfx and music.