How to convert AAC to closed captions with automated transcription
Sign up for a free Sonix trial account—includes 30 minutes of free AAC to captions conversion.
Upload the Advanced Audio Coding File file(s) (*.AAC) from your computer, Dropbox, Google Drive, or by dragging it on the page.
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.
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.
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.
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 incredible customers use SOnix to create closed captions from their AAC files
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?
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Other ways to convert your AAC audio files with Sonix
Create closed captions from your Advanced Audio Coding File files with Sonix
Sonix transcribes your audio and video files in over 37 languages so they are easy to search, edit, and share. Sonix is an online, fully-automated speech to text service that quickly converts Advanced Audio Coding File files to captions. Sign up today and start transcribing.
Includes 30 minutes of free transcription