Accurately convert
English MTS files to text
Sonix automatically transcribes your English MTS files to text in minutes. Access industry-leading artificial intelligence and the days of manually transcribing your English MTS files are long gone. English speech to text: Sonix has been independently reviewed the most accurate English automated transcription, translation, and subtitling platform.
Free to start — no credit card required.
Thousands of Sonix customers convert their English MTS files to text











Use Sonix to quickly convert
English MTS files to text
- 1Log into your Sonix account~30 sec
If you don't have one, you can sign up for Sonix's free account — Your free trial includes 30 minutes of transcription and translation.
- 2Upload your English MTS file~1 min
Click “Upload” and locate the English MTS file on your computer.
- 3Choose language: English~10 sec
Select English as the language spoken, then click “Transcribe”.
- 4Sonix transcribes your MTS file~5 min
Sonix transcribes your English MTS file and converts it to English text.
- 5Polish your English transcript~2 min
Edit your English transcript directly in the browser to correct any misheard words.
- 6Export English text~10 sec
Export the English text to MS Word, PDF, subtitles, or plain text.
Understanding English MTS files
English spans many regional varieties, including American, British, Australian, Irish, Canadian, Caribbean, Indian, and Nigerian English, each with distinct pronunciation, vocabulary, and rhythm. Non-rhotic accents (many British and Australian varieties drop the "r" after vowels, as in "car" or "letter") and vowel shifts across regions are the variations most likely to affect speech recognition.
MTS technical specifications
- Codec
- H.264/AVC video with Dolby Digital (AC-3) or linear PCM audio
- Container
- MPEG-2 Transport Stream (AVCHD)
- Typical bitrate
- 5–24 Mbps video (up to 28 Mbps in AVCHD 2.0)
- Sample rate
- 48 kHz (audio track)
- Compression
- Lossy
English at a glance
- Speakers
- ~1.5 billion speakers worldwide, including roughly 380 million native speakers
- Writing system
- Latin alphabet
- Say hello
- Hello!
Frequently asked questions
How to improve the accuracy of your English transcripts?
Start by improving the quality of the English MTS file that you upload to Sonix. Please use high quality recording equipment, recording in a quiet environment, and ensure that your speakers are speaking clearly to ensure that your transcript is as accurate as possible.
Any advice for the English MTS file that I upload?
Yes, please do not over-compress or over-filter the audio track of your English MTS file. By uploading a high quality version of your audio, we can give you the best level of accuracy.
Aside from MTS, do you support other types of audio/video files?
Yes, we do! You can convert the following file types in English with Sonix:
Why won't my MTS file play on my computer?
MTS files use the AVCHD transport-stream structure, which some default media players do not support, and clips copied out of the camcorder's AVCHD folder can lose playback context. Opening the file in VLC or remuxing it to MP4 usually resolves the issue.
Do I need to convert MTS to MP4 before transcribing?
No. You can upload the MTS file directly, and its audio track is extracted and transcribed the same way as an MP4 upload.
Can Sonix transcribe British and Australian English as well as American English?
Yes. Sonix transcribes English recordings from any region, including British, Australian, Irish, Canadian, and Caribbean accents. Upload your file, review the transcript in the in-browser editor, and export it in your preferred format.
Does English transcription handle recordings with multiple accents?
Yes. A single English recording can include speakers with different regional accents, and Sonix transcribes them in one pass. Speaker labels help you attribute lines to each participant while you edit.
Can Sonix transcribe English audio with heavy background noise?
Sonix can transcribe noisy English audio, but cleaner recordings produce better results. Recordings with background noise, low volume, or crosstalk typically need more correction in the editor.
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The UI is da bomb with so many great features including the one where I can highlight a passage and download as a clip. So very useful! It’s editing and transcription combined!!
I am very happy to have found a transcription service that provides such a high percentage of perfect content.
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