How to convert GSM to closed captions with automated transcription
Sign up for a free Sonix trial account—includes 30 minutes of free GSM to captions conversion.
Upload the Global System for Mobile Audio File file(s) (*.GSM) from your computer, Dropbox, Google Drive, or by dragging it on the page.
Choose the language spoken in the uploaded GSM 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 GSM 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 GSM file. You can also adjust the character length and time duration length of each caption.
That's it! Your GSM 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 GSM files
Convert GSM audio or speech to subtitle
Frequently Asked Questions for Global System for Mobile Audio File (*.GSM)
What is a GSM file?
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.
Does Sonix transcribe audio files with a *.GSM file extension?
Yes, Sonix does automatically transcribe audio files with a .GSM file extension. Sonix is an online audio to text converter. Convert any audio (gsm, mp3, m4a, wav, ...) or video (mp4, mov, avi, ...) file to text without installing any software! Sonix quickly and accurately transcribes *.GSM files and converts them to text in a subtitle format.
Know anyone who needs to convert Global System for Mobile Audio File (.GSM) to subtitle?
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Other ways to convert your GSM audio files with Sonix
Create closed captions from your Global System for Mobile Audio 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 Global System for Mobile Audio File files to captions. Sign up today and start transcribing.
Includes 30 minutes of free transcription