I have  to say, I am reticent  to share my first  pass  of a
program ;p Right now note durations can also only be integer
multiples of the sampling frequency. 

It's  not usable  in any way.  When generating  wavs,  every
individual float returns control to lisp to do any and every
thing under the sun in special scope and send the value back
to C via a callback. (But wav files only get made once). 

The reason I tried this slooooooow  consy approach is that I
wanted   run-time-redefined    harmonics  and  windows   and
arbitrary  stateful  functionality  in lisp for every single
float in C. 

Since  I set up a sndiod  system  sound  monitor   recording
device before,  I'm just making system calls  to mpv to play
stuff (possibly concurrently). Ugh, horrible clicking noises
that my windows  were meant  to keep out. Listen, there  are
lots of problems. 

Using  sndiod   to make midi devices  and using  midish   or
something  instead  seems more attractive  than ever, but  I
need to find out where this journey ends. 

I'm  going  to skip posting  it for others  to look  at  yet
because   it  isn't  very good.   Here's  a lousy  mp3  that
accidentally cuts into the news though. 

I will focus on mixing popular music first...

(oops, resampled to 48000 converting to mp3)