au129.2 KB
AU — 440 Hz Sine Tone
A 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.
Rendered preview of the au file (129.2 KB). Download above for the original.
Specifications
- Sample Rate
- 44100 Hz
- Bit Depth
- 16
- Channels
- 1
- Frequency
- 440 Hz
- Duration Sec
- 3
- Byte Order
- big-endian
- Codec
- PCM (uncompressed)
What is a .au file?
AU (Sun/NeXT audio) is a simple audio format with a short header followed by sample data, historically using 8-bit mu-law or linear PCM encoding. It is a legacy Unix-world format that is compact and easy to parse. It appears in older systems and Java audio contexts.
How to use this file
Use an example AU to test legacy audio decoding, mu-law handling, and converters or players that must support older Unix and Java sound formats.
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.
- aacAAC — ADTSThe clip as raw AAC in an ADTS stream — the codec behind most streaming and mobile audio. For testing AAC decoders and remux into MP4.
- ac3AC-3 — Dolby DigitalThe clip as AC-3 (Dolby Digital) — the multichannel codec used in DVD/broadcast. Rendered here in stereo; for testing AC-3 decoding and conversion.
- m4aALAC — Apple LosslessThe clip as Apple Lossless (ALAC) in an M4A container — lossless, unlike the AAC M4A twin. For testing ALAC decoding and lossless conversion.
Generated by generation/audio_formats.py. Free for any use, no attribution required — license.