PyDub demo

PyDub-Demo.py

import urllib.request
from pydub import AudioSegment
from pydub.playback import play
from pydub.generators import Sine

# Download an audio file
urllib.request.urlretrieve("https://tinyurl.com/wx9amev", "metallic-drums.wav")

# Load into PyDub
loop = AudioSegment.from_wav("metallic-drums.wav")

# Repeat 2 times
loop2 = loop * 2

# Get length in milliseconds
length = len(loop2)

# Set fade time
fade_time = int(length * 0.5)

# Fade in and out
faded = loop2.fade_in(fade_time).fade_out(fade_time)

# Play the faded loop
play(faded)

# Download another loop
urllib.request.urlretrieve("https://tinyurl.com/yx3k5kw5", "beat.wav")

# Load into PyDub
beat = AudioSegment.from_wav("beat.wav")

# Filter the beat at 2kHz
filtered = beat.low_pass_filter(3000)

# Mix loop2 with a reversed version
loop2 = loop2.reverse().pan(-0.5).overlay(loop2.pan(0.5))

# Mix our filtered beat with the new loop2
final = filtered.overlay(loop2-3, loop=True)

# Play the result
play(final)

# Save the result to an MP3 file
final.export("final.mp3", format="mp3")


# Create an empty segment to store our result
result = AudioSegment.silent(duration=0)


# Loop over 0-14
for n in range(15):

    # Generate a sine tone with frequency 200 * n
    gen = Sine(200 * n)

    # Turn the tone into an AudioSegment with duration 200ms and gain -3
    sine = gen.to_audio_segment(duration=200).apply_gain(-3)

    # Fade in / out
    sine = sine.fade_in(50).fade_out(100)

    # Append the sine to our result
    result += sine


# Play the result
play(result)