Sample AAC 100KB File
AAC — efficient lossy audio
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Download 100KB AAC100 KBTestFile-aac-100kb.aac
File details
| Format | AAC |
| Extension | .aac |
| MIME type | audio/aac |
| Size | 100 KB |
| Exact bytes | 102,400 |
| Filename | TestFile-aac-100kb.aac |
| Format version | AAC-LC / ADTS — ISO 14496-3 |
| Contents | 440 Hz sine tone, ~6 s; AAC-LC 128 kbps; stereo; 44.1 kHz; ADTS container; no metadata |
| Encoding | AAC-LC profile; 128 kbps CBR; 44,100 Hz; stereo; ADTS frame header per frame |
What is a 100KB AAC file useful for?
A 6-second, 128 kbps AAC file is the right size for testing AAC upload validation, MIME type detection (audio/aac), and ADTS frame header parsing. AAC is the default audio codec in MP4, HLS streams, and iOS/macOS audio — any platform handling Apple ecosystem media will encounter raw AAC files. Use it to verify your upload endpoint correctly identifies AAC from the ADTS sync word (0xFF 0xF1 or 0xFF 0xF9) and to test AAC playback in your audio player component.
What's inside this file?
Generated by ffmpeg. A 440 Hz sine tone approximately 6 seconds long at 44.1 kHz, stereo, AAC-LC profile at 128 kbps. Wrapped in an ADTS (Audio Data Transport Stream) container — each AAC frame is prefixed with a 7-byte ADTS header containing sync word, profile, sample rate index, channel configuration, and frame length. No MP4/M4A container wrapper. The ADTS format is used for raw AAC streaming and broadcast (HLS audio segments).
Download via curl
curl -L "http://localhost:8000/files/aac/TestFile-aac-100kb.aac" \ -o TestFile-aac-100kb.aac
Need different parameters?
Generate a custom AAC file with exact settings.