Sample AAC 1MB File
AAC — efficient lossy audio
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Download 1MB AAC1 MBTestFile-aac-1mb.aac
File details
| Format | AAC |
| Extension | .aac |
| MIME type | audio/aac |
| Size | 1 MB |
| Exact bytes | 1,048,576 |
| Filename | TestFile-aac-1mb.aac |
| Format version | AAC-LC / ADTS — ISO 14496-3 |
| Contents | 440 Hz sine tone, ~65 s; AAC-LC 128 kbps; stereo; 44.1 kHz; ADTS container; ~2,800 frames |
| Encoding | AAC-LC profile; 128 kbps CBR; 44,100 Hz; stereo; ADTS; ~2,800 frames at 23.2 ms each |
What is a 1MB AAC file useful for?
A 1 MB AAC file at 128 kbps provides approximately 65 seconds of audio — the standard size for a podcast intro, a music preview clip, or an HLS audio-only stream segment. Use it to test AAC-to-MP3 transcoding pipelines (for compatibility with older devices), to verify that your CDN correctly serves AAC with Content-Type: audio/aac, and to confirm that your audio player correctly handles ADTS-framed AAC without MP4 container wrapping.
What's inside this file?
Generated by ffmpeg. A 440 Hz sine tone approximately 65 seconds long at 44.1 kHz, stereo, AAC-LC 128 kbps ADTS. Each ADTS frame covers 1,024 PCM samples at 44.1 kHz, giving a frame duration of approximately 23.2 ms. A 65-second file contains approximately 2,800 ADTS frames. AAC achieves approximately 10:1 compression vs raw PCM at 128 kbps.
Download via curl
curl -L "http://localhost:8000/files/aac/TestFile-aac-1mb.aac" \ -o TestFile-aac-1mb.aac
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