universeNote.frink

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// Functions for converting frequencies to notes.

note[f] :=
{
   notesize = 2^(1/12)
   noteNames = ["C", "C#/Db", "D", "D#/Eb", "E", "F", "F#/Gb", "G", "G#/Ab", "A", "A#/Bb", "B"]
   
   A4 = 440 Hz
   C4 = A4 / (notesize^9)
   C0 = C4 / 2^4
   ratio = f/C0
   notes = ln[ratio]/ln[notesize]
   roundnotes = round[notes]
   octaves = floor[roundnotes/12]
   scale = roundnotes - (octaves * 12)
   return noteNames@scale + octaves
}


// Planck's Law function with respect to frequency and temperature.
Planck[v,T] := 2 h v^3 / c^2 * 1 / (e^((h v)/(k T)) - 1)

T = 2.725 K
maxP = 0 s^-2 kg
maxV = 0

// Quick-and-dirty way to find maximum frequency
for v = 160.1 GHz to 160.3 GHz step .001 GHz
{
   p = Planck[v,T]
   if p > maxP
   {
      maxP = p
      maxV = v
   }
}

println[note[maxV]]


View or download universeNote.frink in plain text format


This is a program written in the programming language Frink.
For more information, view the Frink Documentation or see More Sample Frink Programs.

Alan Eliasen was born 17592 days, 15 hours, 45 minutes ago.