Sonix transcribes your MPA file and creates closed captions that make your content accessible to everyone.
MPEG-2 audio stream for digital media
MPA files are audio files compressed using the MPEG Layer II compression codec to reduce the file size while only slightly impacting the overall sound quality. Digital music and high quality audio programming such as podcasts are usually compressed for web users with this format. The MPA file format uses the MPEG-2 specification for compression to reduce file size for better transmission across the internet.
High-quality compressed audio
Sign up for Sonix's free trial. Includes 30 minutes free.
Upload your MPA file from your computer or cloud storage.
Choose from 54+ languages spoken in your file.
Sonix AI transcribes your MPA with word-level timestamps.
Fine-tune timing and formatting for accessibility.
Download closed captions in SRT and VTT formats.
Yes! Sonix transcribes your MPA file with precise timestamps and creates closed captions in standard formats.
Closed captions include non-speech elements like [music], [applause], and speaker identification. They're designed for deaf and hard-of-hearing viewers.
Yes! Sonix captions meet accessibility requirements when properly reviewed and edited. Our editor helps ensure timing and accuracy standards.
Export captions as SRT, VTT, or TTML. Each format has specific use cases.
Yes! Use our editor to add [music], [laughter], and other non-speech descriptions for full accessibility.
Absolutely! Captions make your video content searchable and improve accessibility, both of which can boost SEO rankings.
Create captions that make your content accessible to deaf and hard-of-hearing viewers.
Meet accessibility requirements with properly formatted closed captions.
Add non-speech elements like [music] and [applause] for full context.
Captions make video content searchable and improve discoverability.
Sonix provided the best transcription of all the platforms I have tested so far.
Way better than other transcription services I've tried. It will save me a lot of time. I'd recommend it to everyone I know.
Your software is absolutely mind blowing. It is worth every penny!
The accuracy of the initial transcription was better than any I've used to date, and making adjustments was very simple.
The UI experience is fantastic! It's quick and easy to understand. Plus it's web based so I can switch between my desktop and laptop easily.
Great product. Been waiting for this.
Sonix is by far the best transcription tool I have ever used.
I am thrilled with the level of accuracy and the easy if which I am able to listen to and adjust the transcript. It’s very user friendly.
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AI transcription and translation in 54+ languages.
