The Math of Music

[maboroshi]

Thought this was kind of neat came across a script using Math to create a Musical note

Code: Select all

import math
import struct
import pyaudio

def play_tone(frequency, amplitude, duration, fs, stream):
    N = int(fs / frequency)
    T = int(frequency * duration)  # repeat for T cycles
    dt = 1.0 / fs
    # 1 cycle
    tone = (amplitude * math.sin(2 * math.pi * frequency * n * dt)
            for n in xrange(N))
    # todo: get the format from the stream; this assumes Float32
    data = ''.join(struct.pack('f', samp) for samp in tone)
    for n in xrange(T):
        stream.write(data)

fs = 48000
p = pyaudio.PyAudio()
stream = p.open(
    format=pyaudio.paFloat32,
    channels=1,
    rate=fs,
    output=True)

# play the C major scale
scale = [130.8, 146.8, 164.8, 174.6, 195.0, 220.0, 246.9, 261.6]
for tone in scale:
    play_tone(tone, 0.5, 0.75, fs, stream)

# up an octave
for tone in scale[1:]:
    play_tone(2*tone, 0.5, 0.75, fs, stream)

stream.close()
p.terminate()

[ayu]

ah neat xD

[joebox]

nice what code is that?

[ayu]

nice what code is that?

It's Python

[computathug]

I remember creating my first tune on the spectrum in basic in similar way

No old man jokes needed

[ph0bYx]

I actually did that too, thugz! I'm not old, I guess..

[lilrofl]

That's pretty neat Mabs, don't forget that MIDI is also music by math in binary.