aac71.9 KB
AAC — ADTS
The clip as raw AAC in an ADTS stream — the codec behind most streaming and mobile audio. For testing AAC decoders and remux into MP4.
Specifications
- Source
- 3 s A-major triad, 44.1 kHz stereo
- Codec
- AAC-LC
- Container
- ADTS
- Lossless
- false
What is a .aac file?
AAC (Advanced Audio Coding) is a lossy audio format that generally outperforms MP3 at the same bitrate, standardized as part of MPEG-2 and MPEG-4. Raw AAC streams use ADTS framing, while AAC is also commonly wrapped in M4A or MP4 containers. It is the default audio codec for Apple, YouTube, and streaming.
How to use this file
Use an example AAC file to test decoder support, ADTS frame parsing, and audio pipelines that must handle both raw streams and container-embedded AAC.
Related files
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- 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.
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- 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.