AAC to text converter
Read an .aac recording as text, speakers labelled. Free accounts read the first 15 min of each file.
AAC · MP3 · M4A · WAV · FLAC · OGG · OGA · WebM · AMR · SPX · OPUS · MP4 · MOV · MKV
Free: read the first 15 min of each file · up to 5 h · 512 MB
Sample output
00:00 Maya Thanks for joining. Let's start with the launch date.
00:04 Daniel Design is done, but the store listing still needs screenshots.
00:10 Maya Can we have those by Friday?
00:13 Daniel Yes, if marketing sends the final copy tomorrow.
00:18 Priya I'll send it tonight.
00:21 Maya Great. Then the launch date stays where it is.
The team keeps the launch date. Design is finished, and the store screenshots will be ready by Friday once marketing sends the final copy, which Priya sends tonight.
- 00:00 Launch date
- 00:10 Store screenshots by Friday
- 00:18 Final copy tonight
1 00:00:00,000 --> 00:00:03,600 Maya: Thanks for joining. Let's start with the launch date. 2 00:00:04,000 --> 00:00:09,200 Daniel: Design is done, but the store listing still needs screenshots. 3 00:00:10,000 --> 00:00:12,100 Maya: Can we have those by Friday? 4 00:00:13,000 --> 00:00:17,400 Daniel: Yes, if marketing sends the final copy tomorrow. 5 00:00:18,000 --> 00:00:19,800 Priya: I'll send it tonight. 6 00:00:21,000 --> 00:00:24,500 Maya: Great. Then the launch date stays where it is.
- A transcript with timestamps and speaker labels you can rename
- Speech in 55 languages, or automatic language detection
- An AI summary and chapters you can jump between
- Download as TXT, SRT, VTT, Word (DOCX), with subtitles timed to the spoken words
- Video files too: only the audio track uploads
- Filler words and repeats removed or kept, your choice
Need the full recording?
- The whole transcript of every file, not only the first 15 min
- 50 h of file transcription a month, with no daily file limit
- Downloads of the whole transcript as TXT, SRT, VTT, Word (DOCX)
$15.99 a month, or $12.99 a month billed yearly
View Sync Pro plansHow it works
- Choose your .aac recording.
- Set the spoken language or keep automatic detection, then press Transcribe.
- Read the AAC transcript in your library.
AAC files and where you meet them
AAC is the audio codec behind a large share of phone recordings, streaming audio and dictation apps. Most of the time it arrives wrapped in an .m4a file, but some call recorders, broadcast tools and older phones write it as a bare .aac stream. Both upload here, so you do not need to rename or convert anything.
Because AAC is compressed, a recording that runs for hours still takes little space. Even a recording close to the 5 h length limit usually stays well under 512 MB, so the length limit is the one to watch.
Some dictation apps record at a low bitrate to save space on the phone. Speech usually survives that well, but if the recording sounds muffled when you play it back, the transcript will struggle with the same words. In that case, switch the app to its standard quality setting before your next recording. A quiet room and a phone held close to your mouth help more than any setting.
Free vs Sync Pro
| Free | Sync Pro | |
|---|---|---|
| Readable transcript | First 15 min of each file | The whole transcript |
| Transcription hours | 6 h in total | 50 h of uploads a month |
| Files per day | Up to 10 | No daily file limit |
| Longest and largest file | 5 h · 512 MB | 5 h · 512 MB |
| Downloads | TXT, SRT, VTT, Word (DOCX), first 15 min | TXT, SRT, VTT, Word (DOCX) |
| Price | Free | $15.99 a month, or $12.99 a month billed yearly |
Questions
What is the difference between AAC and M4A?
AAC is the compressed audio itself, and M4A is a common file wrapper for it. An .aac file holds the audio with almost nothing around it. Either one uploads here and gives the same transcript.
How long can an AAC recording be?
Up to 5 h per file, and up to 512 MB. AAC is compact, so long recordings rarely reach the size limit. On the free plan you read the first 15 min of each transcript.
Where do .aac files come from?
Call recorders, some Android voice recorders, broadcast and podcast tools, and audio saved from streams. If an app offers M4A or AAC as an export choice, either works, because both hold the same kind of audio.
Can I transcribe AAC files for free?
You can start free. Your account has 6 h of transcription in total, and each file uses hours equal to its length. Sync Pro unlocks full transcripts and 50 h of uploads a month.
AAC to text converter
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