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wave Module¶
The wave module reads and writes WAV (RIFF) audio files, supporting various sample rates and bit depths.
Complexity Reference¶
| Operation | Time | Space | Notes |
|---|---|---|---|
open() |
O(1) | O(1) | Open file; reads header |
| Read/write | O(n) | O(n) | n = frame count; I/O bound |
Working with WAV Files¶
Reading WAV File¶
import wave
# Open - O(1)
with wave.open('audio.wav', 'rb') as wav:
# Get properties
n_channels = wav.getnchannels()
sample_width = wav.getsampwidth()
framerate = wav.getframerate()
n_frames = wav.getnframes()
# Read frames - O(n)
frames = wav.readframes(n_frames)
Writing WAV File¶
import wave
# Create - O(1)
with wave.open('output.wav', 'wb') as wav:
# Set parameters
wav.setnchannels(2) # Stereo
wav.setsampwidth(2) # 16-bit
wav.setframerate(44100) # 44.1 kHz
# Write frames - O(n)
wav.writeframes(audio_data)