Convert AAC to subtitles

Transform your AAC audio into professional subtitles in multiple formats. AAC's superior quality means accurate subtitles for your projects.

SRT & VTT
5-min turnaround
All platforms
Audio
Video
DOCX
SRT/VTT
PDF
53+ Languages
About This Format

Understanding AAC files

What is a AAC file?

High-quality compressed audio, Apple's preferred format

Advanced Audio Coding (AAC) is the default encoding used by Apple iTunes and the iTunes Music Store. It is a compressed audio file similar to an .MP3 file, but offers several performance improvements; examples include a higher coding efficiency for both stationary and transient signals, a simpler filterbank, and better handling of frequencies above 16 kHz; maintains quality nearly indistinguishable from the original audio source.

Common Uses

  • iTunes music
  • Apple podcasts
  • Streaming audio
  • Professional audio distribution

Audio Quality

Superior quality to MP3 at equivalent bitrates

Transcription Tips for AAC

  • AAC at 128kbps+ yields excellent transcription accuracy
  • Supports clear speech frequencies well

Where AAC Files Come From

  • Apple iTunes Store
  • Apple Music
  • iOS voice recordings
  • Podcast apps
10x
Faster than real-time
Get your AAC subtitles in minutes
99%
Accuracy rate
Industry-leading AI for AAC files
53+
Languages
Subtitles in any language
30+
Export formats
SRT, VTT, FCPXML, and more
How It Works

Create subtitles from AAC in 6 steps

Step 1

Create account

Sign up for Sonix's free trial. Includes 30 minutes free.

Step 2

Upload file

Upload your AAC file from your computer or cloud storage.

Step 3

Select language

Choose from 53+ languages spoken in your file.

Step 4

Auto-transcribe

Sonix AI transcribes your AAC with word-level timestamps.

Step 5

Split subtitles

Customize line length, duration, and subtitle breaks.

Step 6

Export

Download subtitles as SRT, VTT, or other formats.

Common Questions

Everything about AAC subtitles

What subtitle formats can I export from AAC?

Sonix exports AAC transcriptions to SRT, VTT, ASS/SSA, SBV, STL, and more. Choose the format that matches your platform requirements.

Does AAC quality affect subtitle accuracy?

Yes! AAC's efficient compression preserves more audio detail than MP3 at the same bitrate, which can improve subtitle accuracy for challenging audio.

What's the best subtitle format for AAC content?

SRT is the most widely compatible. For web video, VTT is preferred. Sonix supports both plus many professional formats.

How do I improve AAC subtitle accuracy?

Use clear AAC files at 96kbps or higher. After transcription, use Sonix's editor to correct any errors before exporting.

Can I add speaker names to AAC subtitles?

Yes! Enable speaker labels when exporting subtitles. Sonix identifies different speakers in your AAC audio automatically.

Can I hardcode subtitles from AAC audio?

Sonix generates subtitle files you can import into video editors. Export to SRT and use your preferred video software to burn into video.

Why Sonix

Professional subtitles from AAC files

Multiple Formats

Export subtitles as SRT, VTT, FCPXML, and more for any platform.

Customizable

Control line length, duration, and style of your subtitles.

Translate

Create subtitles in 53+ languages from your original audio.

Burn-in Option

Permanently embed subtitles into your video with one click.

Related

More ways to convert AAC files

Other AAC conversions

AAC to Text

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AAC to DOCX

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AAC to Captions

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Other file formats

OPUS to text
FLAC to text
AIF to text
XSPF to text
MP3 to text
AU to text
CAF to text
OGG to text
M4A to text
WAV to text
See all supported file formats
Reviews

Trusted by content creators

4.98 rating from 211 reviews

I was amazed by your accuracy. What I used were not very good recordings. One with an American accent, another one Australian and many background noises. The transcript exceeded my expectations.
AZ
Andrew Z.
Hammersmith, United Kingdom
I had been using Dragon voice recognition software, but Sonix eliminates that step all together. I absolutely love Sonix.
JA
Judith A.
Ireland
Your software is absolutely mind blowing. It is worth every penny!
MD
Mathieu D.
Paris, France
The process was super easy. I liked that you can upload video file without stripping away the audio first to do it, this of course saves production time. Great job overall for sure!!!
AS
Aaron S.
San Francisco, CA USA
Works very well with Arabic voices.
MA
Mohamed A.
Dubai, UAE
I am a video editor and I found you by trying a few services with free trials. Sonix was far, far superior as well as an easy process to trial enroll.
PW
Polly W.
Guadalajar, Mexico
Unbelievable! Wow, it's amazing. Really amazing. I didn't believe it so I wanna test something and I got actually result I wanted. Amazing!
AG
Ahmed G.
Dhaka, Bangledesh
Super easy interface, easy to upload and great results.
DK
Dan K.
Seattle, OR, USA
Read more testimonials
Get Started

Create AAC subtitles now

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