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











Use Sonix to quickly convert
Japanese FLAC 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 Japanese FLAC file~1 min
Click “Upload” and locate the Japanese FLAC file on your computer.
- 3Choose language: Japanese~10 sec
Select Japanese as the language spoken, then click “Transcribe”.
- 4Sonix transcribes your FLAC file~5 min
Sonix transcribes your Japanese FLAC file and converts it to Japanese text.
- 5Polish your Japanese transcript~2 min
Edit your Japanese transcript directly in the browser to correct any misheard words.
- 6Export Japanese text~10 sec
Export the Japanese text to MS Word, PDF, subtitles, or plain text.
Understanding Japanese FLAC files
Standard Japanese (hyojungo), based on Tokyo speech, dominates broadcasting and education and is the variety speech recognition models are primarily trained on. Kansai dialect (Osaka and Kyoto) is the most prominent regional variant, with different pitch accent and vocabulary, while Tohoku and Kyushu dialects diverge further from the standard; the traditional Ryukyuan languages of Okinawa differ so much that linguists classify them as separate languages rather than Japanese dialects.
FLAC technical specifications
- Codec
- FLAC (Free Lossless Audio Codec)
- Container
- Native FLAC stream (can also be muxed into Ogg or Matroska)
- Typical bitrate
- Roughly 400–1,000 kbps for CD-quality stereo (varies with content; typically 50–70% of uncompressed size)
- Sample rate
- 44.1–192 kHz common (format supports 1 Hz up to 655 kHz)
- Compression
- Lossless
Japanese at a glance
- Speakers
- ~125 million speakers worldwide
- Writing system
- Mixed script: kanji (Chinese characters) combined with the hiragana and katakana syllabaries, written without spaces between words
- Say hello
- こんにちは (Kon'nichiwa)!
Frequently asked questions
How to improve the accuracy of your Japanese transcripts?
Start by improving the quality of the Japanese FLAC 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 Japanese FLAC file that I upload?
Yes, please do not over-compress or over-filter the audio track of your Japanese FLAC file. By uploading a high quality version of your audio, we can give you the best level of accuracy.
Aside from FLAC, do you support other types of audio/video files?
Yes, we do! You can convert the following file types in Japanese with Sonix:
Do I need to convert FLAC to MP3 before transcribing?
No. FLAC files can be uploaded and transcribed directly, and skipping the MP3 conversion avoids an unnecessary lossy re-encode of your audio.
Why won't my FLAC file play in iTunes or Apple Music?
Apple's media apps do not natively support FLAC; Apple uses its own lossless codec, ALAC. You can play FLAC on Apple devices through the Files app or a third-party player, or convert the file to ALAC or AAC for library use.
Can Sonix transcribe Japanese audio and video to text?
Yes. Upload your audio or video file, select Japanese as the spoken language, and Sonix returns a transcript in standard Japanese script (kanji, hiragana, and katakana) that you can edit in the browser and export.
Does Japanese transcription handle Kansai dialect and regional accents?
Sonix's Japanese model is built around standard (Tokyo) Japanese and generally handles regional accents, but strongly dialectal vocabulary such as Kansai-ben expressions may need corrections in the built-in editor.
Can Sonix create Japanese subtitles?
Yes. After transcribing, you can split the Japanese transcript into subtitle lines and export SRT or VTT files for video captioning.
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Your app is amazing. Seriously, I'm blown away by the technology. The speed, accuracy, and the fact that you can play the audio and that it highlights the transcript in sync.
The highest accuracy I have ever achieved through similar services.
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