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.
Transcription was almost perfect!!
I’m stunned how much easier it makes life. I worked on documentary films and it cost us a fortune to have the interviews transcribed. The idea that this exists is mind-boggling to me.
Impressed at how seamless Sonix makes editing transcripts. This is so much easier and more enjoyable than manually writing an entire transcript myself.
Sonix is a very user-friendly platform, and they are very transparent about what is included in the monthly fee... It's transcribed very fast and is quite ...
I love how easy it is – it saves me so much time transcribing – I can just pull out the main points of interest from the transcription.
It really accelerated my work and I was amazed by the accuracy, especially given that the video featured only non-native speakers.
I had been using Dragon voice recognition software, but Sonix eliminates that step all together. I absolutely love Sonix.
I ran through your software and it is fantastic! For what we need it's a game-changer.
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AI transcription and translation in 53+ languages.
