sound-effects-generator（音效发生器）

Sound Effects Generator

Generate programmatic audio: pure tones, noise types, DTMF signals, and simple sound effects. Perfect for testing, alerts, audio cues, and placeholder sounds.

Quick Start

from scripts.sfx_generator import SoundEffectsGenerator

# Generate a tone
sfx = SoundEffectsGenerator()
sfx.tone(440, duration=1000).save("a440.wav")

# Generate white noise
sfx.noise("white", duration=2000).save("whitenoise.wav")

# Create a beep sequence
sfx.beep_sequence([440, 880, 440], durations=200, gap=100).save("alert.wav")

Features

• Tones: Sine, square, sawtooth, triangle waveforms
• Noise: White, pink, brown/red noise
• DTMF: Phone dial tones
• Sequences: Multi-tone patterns
• Effects: Fade, volume control
• Export: WAV, MP3

API Reference

Initialization

sfx = SoundEffectsGenerator(sample_rate=44100)

Tone Generation

# Pure sine wave
sfx.tone(frequency=440, duration=1000)

# Different waveforms
sfx.tone(440, duration=1000, waveform="sine")      # Default
sfx.tone(440, duration=1000, waveform="square")
sfx.tone(440, duration=1000, waveform="sawtooth")
sfx.tone(440, duration=1000, waveform="triangle")

# With volume (0.0 to 1.0)
sfx.tone(440, duration=1000, volume=0.5)

Noise Generation

# White noise (equal energy all frequencies)
sfx.noise("white", duration=2000)

# Pink noise (1/f, natural sounding)
sfx.noise("pink", duration=2000)

# Brown noise (1/f^2, deeper)
sfx.noise("brown", duration=2000)

# With volume
sfx.noise("white", duration=1000, volume=0.3)

DTMF Tones

# Single digit
sfx.dtmf("5", duration=200)

# Sequence (phone number)
sfx.dtmf_sequence("5551234", tone_duration=150, gap=50)

Beep Sequences

# Single beep
sfx.beep(frequency=800, duration=200)

# Multiple beeps (same frequency)
sfx.beep_sequence([800, 800, 800], durations=100, gap=100)

# Melody (different frequencies)
sfx.beep_sequence([523, 659, 784, 1047], durations=200, gap=50)

# Varying durations
sfx.beep_sequence(
    frequencies=[440, 880],
    durations=[300, 500],
    gap=100
)

Silence

# Generate silence
sfx.silence(duration=1000)

Effects

# Fade in/out
sfx.tone(440, 2000).fade_in(200).fade_out(500)

# Volume adjustment
sfx.tone(440, 1000).volume(0.5)

Chaining

# Combine multiple sounds
sfx.tone(440, 500) \
   .silence(200) \
   .tone(880, 500) \
   .save("two_tones.wav")

Save

# Save to WAV
sfx.save("output.wav")

# Save to MP3 (requires pydub)
sfx.save("output.mp3", bitrate=192)

CLI Usage

# Generate tone
python sfx_generator.py --tone 440 --duration 1000 --output tone.wav

# Generate noise
python sfx_generator.py --noise white --duration 2000 --output noise.wav

# Generate DTMF
python sfx_generator.py --dtmf "5551234" --output phone.wav

# Generate beep pattern
python sfx_generator.py --beeps "800,800,800" --duration 100 --gap 100 --output alert.wav

# With waveform
python sfx_generator.py --tone 440 --waveform square --duration 1000 --output square.wav

CLI Arguments

Examples

Alert Sound

sfx = SoundEffectsGenerator()
sfx.beep_sequence(
    frequencies=[880, 1100, 880, 1100],
    durations=150,
    gap=50
)
sfx.fade_out(100)
sfx.save("alert.wav")

Notification Chime

sfx = SoundEffectsGenerator()

# C-E-G chord progression
notes = [523, 659, 784]  # C5, E5, G5
for freq in notes:
    sfx.tone(freq, 200)
    sfx.silence(50)

sfx.fade_out(200)
sfx.save("chime.wav")

White Noise Background

sfx = SoundEffectsGenerator()
sfx.noise("brown", duration=60000)  # 1 minute
sfx.volume(0.3)  # Quiet
sfx.fade_in(2000)
sfx.fade_out(2000)
sfx.save("background.mp3", bitrate=128)

DTMF Phone Number

sfx = SoundEffectsGenerator()
sfx.dtmf_sequence("18005551234", tone_duration=180, gap=80)
sfx.save("phone_dial.wav")

Test Tone Sweep

sfx = SoundEffectsGenerator()

# Generate tones from 100Hz to 1000Hz
for freq in range(100, 1001, 100):
    sfx.tone(freq, 200)
    sfx.silence(50)

sfx.save("sweep.wav")

Common Frequencies

Musical Notes (A4 = 440Hz)

Dependencies

numpy>=1.24.0
scipy>=1.10.0
soundfile>=0.12.0

Optional: pydub (for MP3 export)

Limitations

• No complex synthesis (no ADSR envelopes)
• No stereo panning
• Limited to basic waveforms
• MP3 export requires pydub + FFmpeg