How to convert AAC to closed captions with Sonix

Sonix converts your audio-to-text using the latest artificial intelligence algorithms—it's fast, easy, beautiful, and affordable. We extract the speech from your AAC file and help you create captions for your videos in minutes.

Convert AAC to captions
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How do I accurately convert my AAC files to closed captions? 📋

Sonix uses the latest automated transcription technology to convert your audio files (*.aac) to closed captions. Follow these six steps and see how magical it is:

Step 1: Create a free Sonix account to start converting your AAC file to a closed caption file

Step 1

Sign up for a free Sonix trial account—includes 30 minutes of free AAC to captions conversion.

Step 2: Upload your AAC files from your computer, Google Drive, Dropbox, or by dragging it on the page.

Step 2

Upload the Advanced Audio Coding File file(s) (*.AAC) from your computer, Dropbox, Google Drive, or by dragging it on the page.

Step 3: Select the language spoken in your AAC file, then click 'Start Transcribing Now.'

Step 3

Choose the language spoken in the uploaded AAC file. We support over 37 different languages including Russian, Chinese, Spanish, and English. Click the 'Start Transcribing Now' button.

Step 4: Sonix does all the work so grab a tasty cupcake. Our servers will extract the audio from your AAC file and convert it to SRT.

Step 4

Sonix will then automatically transcribe the audio from your AAC file and convert it to a simple text format. Grab a cupcake, it will take only a few minutes.

Step 5: Once your AAC was converted to text, you might need to polish up the transcript. Now, you can easily do that with our AudioText Editor.

Step 5

Use the Sonix AudioText Editor to polish your transcript before we convert it to a caption file. Simply type in your browser to correct any words in your transcript.

Step 6: Download a SRT version of your AAC file by clicking Export and selecting 'Subrip caption file (.srt).'

Step 6

Click the 'Export' button. Choose either 'Subrip subtitle file (.srt)' or 'WebVTT file (.vtt)' from the dropdown to download the closed caption version of your AAC file. You can also adjust the character length and time duration length of each caption.

That's it! Your AAC file has now been converted to closed captioning and is ready for the next step in your workflow!🎉

Thousands of customers create closed captions from their AAC files with Sonix 💖

  • Google converts their AAC audio files to closed captions with Sonix
  • Microsoft converts their AAC audio files to closed captions with Sonix
  • NBC Universal converts their AAC audio files to closed captions with Sonix
  • ESPN converts their AAC audio files to closed captions with Sonix
  • Stanford University converts their AAC audio files to closed captions with Sonix
  • Yale University converts their AAC audio files to closed captions with Sonix
  • University of California in Los Angeles (UCLA) converts their AAC audio files to closed captions with Sonix
  • ABC News converts their AAC audio files to closed captions with Sonix
  • Quartz converts their AAC audio files to closed captions with Sonix
  • CNBC converts their AAC audio files to closed captions with Sonix
  • CIBC converts their AAC audio files to closed captions with Sonix
  • Princeton University converts their AAC audio files to closed captions with Sonix

Convert AAC audio or speech to subtitle🔈

Frequently Asked Questions for Advanced Audio Coding File (*.AAC)

What is a AAC file?

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.

Does Sonix transcribe audio files with a *.AAC file extension?

Yes, Sonix does automatically transcribe audio files with a .AAC file extension. Sonix is an online audio to text converter. Convert any audio (aac, mp3, m4a, wav, ...) or video (mp4, mov, avi, ...) file to text without installing any software! Sonix quickly and accurately transcribes *.AAC files and converts them to text in a subtitle format.

Know anyone who needs to convert Advanced Audio Coding File (.AAC) to subtitle?

We'd appreciate it if you tell them about Sonix—the best way to convert AAC to subtitle.

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Create closed captions from your Advanced Audio Coding File files with Sonix 🚀

Sonix automatically transcribes and translates your audio and video files in over 37 languages. Easily search, edit, and share your media files. Sonix is an online, fully-automated speech to text service that quickly converts Advanced Audio Coding File files to captions. Fast, accurate, and affordable. Millions of users from all over the world.

Fast, accurate automated transcription

Includes 30 minutes of free transcription

Let our support team help you with all of your automated transcription questions. Pictured: Christine Lee

Transcribe and translate confidently knowing you’re backed by our award-winning team who is ready to answer your questions. Get immediate help by visiting our Help Center, resources, tutorials, and Introduction to Sonix videos.

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