I fought  in synth battle royale today and still feel wired.
It was catastrophic!  Now I know publius'  ffmpeg line works
for me as well,  so the lispy  gopher  show will come  alive
henceforward.   I haven't listened to the/an sbr review yet,
having a mind to pen some thoughts first. 

The lineup  was tob mnw gef abortretryfail  ldbeth screwtape
and  smj.   x2180  was too late  to get in the list   today.
Everyone  was amazing, and it was mnw's first battle  royale
as well.   Please  enjoy  the sbr review,  for which  I will
remember  to insert  a link here.  If you will forgive me, I
will concentrate on my own experience. 

http://archives.anonradio.net/202209170300_openmic.mp3

publius'   ffmpeg line worked without a hitch for openmic (I
had only tested  it locally)  when it came my turn.   I  had
previously  gotten  excited  when smj said it was time for a
first   time contestant  (mnw of That's  News To Me in  that
case).    (I  forgot  mnw's tagline,  You Can't Spell  _____
without mnw. The word eludes me. Swamphen? j/k ;p). 

Since  a piece of (virtual)  hardware I wanted  to play with
was  using my sndio snd/mon  virtual  system  sound  monitor
device,   with the idea of feeding  that to itself  as  some
notion of an integrator  autonomous feedback circuit,  I had
aNONradio waiting-for-me  music feeding  back into my system
sound when I first connected. Emergency abort. 

I had two (out of three)  modes  of getting  sound,  nestled
comfortably  within  my ecl lisp repl.  I could direct  sine
waveforms into wav files using libsndfile from my lisp sffi.
This,  I guess, was my synth software.   I had written  this
soft synth personally, unrelatedly (kind of), though tob did
not seem pleased by that. And it just takes a function float
-> float and gives you a wav of the desired ength. 

As I said, I had a system sound monitor. What occurred to me
was to sample others'  live battles into my own round  (even
though I guess this was outside my 10 minutes).   I did this
by experimentally catching batches of seconds from my system
sound monitor.  This was tricky (well, download  the results
and  see)  since I didn't  know what improvisational   sound
would be made next and had to keep trying to get lucky. 

*I have to compress these before I post them.

I made  it about  five minutes  into my 10 (or less)  minute
timer  before  I bailed  from the round.   Screwtape  was an
appropriate  name for me, I was told.  One thing about being
in the Common  Lisp  repl was that I had its LOOP construct,
and from the compiler, ECL's multiprocessing  threads handy.
Having generated/gotten  sounds, and started  a loop thread,
all you can really do is sit on your hands or add sound loop
threads  (and eventually  stop them).  In the future  when I
include my SND/1 mic, which I left out this time, it will be
important to explain my environment and intents. 

Over  the  course   of  round  2, I  picked   up  some  nice
sophisticated beats and synth from my sound monitor and just
started those, along with generating a series of variants of
A  (420,  438, 440, something  else)  I asked  for from  the
COMmentators.   The trill  of A beats  sounded  a lot like a
phone  ringing.  Honestly,  it took me a while to figure out
that that was what the phone / dialup sound was. The beats I
had  picked  up, and I-think-gef's  synth (along  with mnw's
voice  saying  OK) seemed  to give me a pretty  nice  sound,
though  I still don't know how that came across the icecast.
I tried unmuting the aNONradio  stream to take a peek (which
would have ended up in my stream as well, I guess) but to no
clear  avail.   I jammed  a random  previous-snd/mon-snippet
function,  but bailed after about two minutes of round 2. In
this  second  case, smj was quick to pick  up on my finished
stream with amazing synth. 

I'm listening to it now...

[Listening to it, I hope that I can give tob-like  dictation
- I was too nervous to pay attention before]