Sonix transcribes your GSM file and exports it as SRT subtitles that you can use with any video platform or editor.
Telephone-quality audio for voicemail and calls
GSM is a compressed audio stream that is primarily used by cell phones. GSM files are designed for telephone-quality audio use in Europe and stores audio mainly for telephone quality voice. It makes for a good balance between size of file and quality retention with data around 96KB per minute. GSM is primarily used for voicemail storage or to record phone conversations that will be played back later.
Telephone-grade audio; good for speech, not music
Sign up for Sonix's free trial. Includes 30 minutes free.
Upload your GSM file from your computer or cloud storage.
Choose from 53+ languages spoken in your file.
Sonix AI transcribes and timestamps your GSM audio.
Fine-tune subtitle timing and text with our editor.
Download your GSM subtitles as an SRT file.
Yes! Sonix transcribes your GSM file with precise timestamps and exports it as SRT subtitles ready for any video platform.
SRT (SubRip Subtitle) is the most widely supported subtitle format. It works with YouTube, Vimeo, Facebook, and all major video editors.
Sonix generates word-level timestamps accurate to the hundredth of a second, ensuring your subtitles sync perfectly with the audio.
Yes! Our editor lets you adjust subtitle timing, merge or split captions, and customize character limits per line.
Absolutely! Upload your SRT file to YouTube Studio and your subtitles will sync automatically with your video.
Yes! Customize your SRT with options for max characters per line, lines per caption, and maximum duration.
Word-level timing ensures your subtitles sync perfectly with the audio.
SRT works with YouTube, Vimeo, Facebook, and all major video platforms.
Adjust timing, line length, and caption duration to your needs.
Import directly into Final Cut Pro, Premiere, DaVinci Resolve, and more.
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Fantastic product and service. Fast, great quality transcript, great online editing facility. Whole experience was easy and problem free.
Very cool and fascinating too. Ahh the power of algorithms. I can tell you that I love the overall UI experience because it's pretty, dumbed down, and very easy for me to use. I've...
The accuracy of the initial transcription was better than any I've used to date, and making adjustments was very simple.
Incredibly fast return! Amazingly accurate transcription and exceptionally affordable!
Sonix is AWESOME and extremely accurate. This software has it all. I wish that all of the software that I use on a daily basis had the complete and thoughtfully created functionali...
I love how quick, affordable and accurate it is, but what I like MOST is that the words are highlighted as the recording speaks them!
Blown away by what it does! Accuracy, ease of use, affordability, simple straightforward interface with well thought out additional tools and functions. Superb!
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AI transcription and translation in 53+ languages.
