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wavnetlogosynthesizer

writing to a sound file in netlogo : or how to tune netlogo

I am writing a simple synthesiser.

This is the totality of my code

turtles-own [f]
  to setup
    ca
    file-close
    file-open "tune.snd"
    crt 1 [set f 100]
    reset-ticks
 end

to go
   file-write mean [sin(2 * pi * f * ticks)] of turtles
   tick
 end

when I run 

Repeat 44100 [go] file-close

and load the output into a sound editor at 44100 hertz I get one second of sound. All is good so far. Unfortunately, it is meant to be a 100 Hz tone but instead, it is one second of something quite a bit higher [over 16k Hz].

What am I doing wrong?

Solution

  • First off, this is awesome!

    The problem's simple. sin in NetLogo uses degrees, not radians.