Audio Converter

Convert audio files between popular formats with control over quality settings. Supports batch processing and maintains metadata where possible.

Quick Start

from scripts.audio_converter import AudioConverter

# Simple conversion
converter = AudioConverter("input.wav")
converter.convert("output.mp3")

# With quality settings
converter = AudioConverter("input.flac")
converter.bitrate(320).sample_rate(44100).convert("output.mp3")

# Batch convert directory
AudioConverter.batch_convert("./input_folder", "./output_folder", format="mp3", bitrate=192)

Features

• Format Support: MP3, WAV, FLAC, OGG, M4A/AAC, AIFF
• Quality Control: Bitrate, sample rate, channels
• Metadata Preservation: Copy tags when possible
• Batch Processing: Convert entire directories
• Normalization: Optional volume normalization

API Reference

Initialization

# From file
converter = AudioConverter("audio.wav")

Settings

converter.bitrate(192)        # kbps (for lossy formats)
converter.sample_rate(44100)  # Hz
converter.channels(2)         # 1=mono, 2=stereo
converter.normalize(True)     # Normalize volume

Conversion

# Convert to format (inferred from extension)
converter.convert("output.mp3")

# Explicit format
converter.convert("output", format="mp3")

Batch Processing

# Convert all files in directory
AudioConverter.batch_convert(
    input_dir="./wavs",
    output_dir="./mp3s",
    format="mp3",
    bitrate=320
)

CLI Usage

# Simple conversion
python audio_converter.py --input song.wav --output song.mp3

# With quality settings
python audio_converter.py --input song.flac --output song.mp3 --bitrate 320 --sample-rate 44100

# Batch convert
python audio_converter.py --input-dir ./wavs --output-dir ./mp3s --format mp3 --bitrate 192

# Normalize during conversion
python audio_converter.py --input song.wav --output song.mp3 --normalize

CLI Arguments

Argument	Description	Default
--input	Input audio file	Required
--output	Output file path	Required
--input-dir	Input directory for batch	-
--output-dir	Output directory for batch	-
--format	Output format	From extension
--bitrate	Bitrate in kbps	192
--sample-rate	Sample rate in Hz	Original
--channels	Number of channels	Original
--normalize	Normalize volume	False

Supported Formats

Format	Extension	Type	Notes
MP3	.mp3	Lossy	Most compatible
WAV	.wav	Lossless	Large files
FLAC	.flac	Lossless	Compressed lossless
OGG	.ogg	Lossy	Open format
M4A	.m4a	Lossy	AAC codec
AIFF	.aiff	Lossless	Apple format

Examples

Convert WAV to MP3

converter = AudioConverter("recording.wav")
converter.bitrate(320).convert("recording.mp3")

Convert FLAC to Multiple Formats

source = AudioConverter("album.flac")

# High quality MP3
source.bitrate(320).convert("album_hq.mp3")

# Standard MP3
source.bitrate(192).convert("album_std.mp3")

# OGG for streaming
source.bitrate(128).convert("album.ogg")

Batch Convert for Podcast

# Convert all WAV recordings to MP3 with podcast settings
AudioConverter.batch_convert(
    input_dir="./raw_episodes",
    output_dir="./episodes",
    format="mp3",
    bitrate=128,
    sample_rate=44100,
    channels=1  # Mono for podcasts
)

Dependencies

pydub>=0.25.0
soundfile>=0.12.0

Note: Requires FFmpeg installed on system for MP3/M4A support.

Limitations

• Requires FFmpeg for MP3 and M4A formats
• Metadata transfer is best-effort
• Some format combinations may not preserve all tags