m4a184.4 KB
ALAC — Apple Lossless
The clip as Apple Lossless (ALAC) in an M4A container — lossless, unlike the AAC M4A twin. For testing ALAC decoding and lossless conversion.
Specifications
- Source
- 3 s A-major triad, 44.1 kHz stereo
- Codec
- ALAC
- Container
- MP4
- Lossless
- true
What is a .m4a file?
M4A is an MPEG-4 audio container, essentially an MP4 file holding audio-only content, usually AAC or sometimes Apple Lossless (ALAC). It supports rich metadata and chapters and is the standard for iTunes and Apple Music downloads. The .m4a extension signals audio-only MP4 content.
How to use this file
Use an example M4A to test MP4 container parsing, AAC or ALAC decoding, metadata and chapter extraction, and converters between M4A and MP3 or FLAC.
Related files
- aiffAIFF — 1 kHz Sine ToneA pure 1 kHz sine tone stored as AIFF — Apple's big-endian 16-bit PCM container, 3 seconds, 44.1 kHz mono. A clean reference for testing AIFF decoders and WAV↔AIFF conversion.
- aiffAIFF — 440 Hz Sine ToneA pure 440 Hz sine tone stored as AIFF — Apple's big-endian 16-bit PCM container, 3 seconds, 44.1 kHz mono. A clean reference for testing AIFF decoders and WAV↔AIFF conversion.
- auAU — 1 kHz Sine ToneA pure 1 kHz sine tone stored as a Sun/NeXT AU file — big-endian 16-bit PCM, 3 seconds, 44.1 kHz mono. A compact reference for AU decoding and format conversion.
- auAU — 440 Hz Sine ToneA pure 440 Hz sine tone stored as a Sun/NeXT AU file — big-endian 16-bit PCM, 3 seconds, 44.1 kHz mono. A compact reference for AU decoding and format conversion.
- wav1 kHz Sine ToneA pure 1000 Hz sine tone, 3 seconds, 16-bit 44.1 kHz mono — a clean reference signal for level metering, spectrum analysis, and waveform rendering.
- wav220 Hz Sine ToneA pure 220 Hz sine tone, 3 seconds, 16-bit 44.1 kHz mono — a clean reference signal for level metering, spectrum analysis, and waveform rendering.
Generated by generation/audio_codecs.py. Free for any use, no attribution required — license.