Accurately convert Czech AU files to text
Sonix automatically transcribes your Czech AU files to text in minutes. Access industry-leading artificial intelligence and the days of manually transcribing your Czech AU files are long gone. Czech speech to text: Sonix has been independently reviewed the most accurate Czech automated transcription, translation, and subtitling platform.
Free to start — no credit card required.
Thousands of Sonix customers convert their Czech AU files to text
Use Sonix to quickly convert
Czech AU 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 Czech AU file~1 min
Click “Upload” and locate the Czech AU file on your computer.
- 3Choose language: Czech~10 sec
Select Czech as the language spoken, then click “Transcribe”.
- 4Sonix transcribes your AU file~5 min
Sonix transcribes your Czech AU file and converts it to Czech text.
- 5Polish your Czech transcript~2 min
Edit your Czech transcript directly in the browser to correct any misheard words.
- 6Export Czech text~10 sec
Export the Czech text to MS Word, PDF, subtitles, or plain text.
Understanding Czech AU files
Czech has a notable gap between the written standard (spisovná čeština) and the everyday spoken variety known as Common Czech (obecná čeština), which dominates casual speech in Bohemia. Moravian and Silesian regional dialects add further variation, and Czech is closely related to — but distinct from — Slovak, so recordings should be matched to the correct language.
AU technical specifications
- Codec
- µ-law, A-law, or linear PCM (Audacity block files use 32-bit float PCM)
- Container
- AU (Sun audio)
- Typical bitrate
- Varies by encoding; classic 8 kHz µ-law files are 64 kbps
- Sample rate
- 8–48 kHz typical (8 kHz for classic µ-law); the header supports arbitrary rates, and Audacity chunks use the project's rate
- Compression
- Container (varies)
Czech at a glance
- Speakers
- ~13 million speakers worldwide
- Writing system
- Latin alphabet with diacritics (č, š, ž, ř, ů)
- Say hello
- Ahoj!
Frequently asked questions
How to improve the accuracy of your Czech transcripts?
Start by improving the quality of the Czech AU 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 Czech AU file that I upload?
Yes, please do not over-compress or over-filter the audio track of your Czech AU file. By uploading a high quality version of your audio, we can give you the best level of accuracy.
Aside from AU, do you support other types of audio/video files?
Yes, we do! You can convert the following file types in Czech with Sonix:
Why is my Audacity project folder full of small AU files?
Older versions of Audacity split a project's audio into small AU block files inside a _data folder so long tracks could be edited efficiently, and the .aup project file reassembles them in order. Avoid moving or renaming these chunks; open the project and export the audio instead.
How do I play a standalone AU file?
Standalone AU files use the Sun audio format and open in players such as VLC and editors such as Audacity. Converting to WAV or MP3 gives the broadest compatibility with modern software and devices.
Can Sonix transcribe Czech audio and video files?
Yes. Upload your Czech audio or video file, select Czech as the spoken language, and Sonix returns a transcript you can edit in the browser and export to formats like Word, SRT, and VTT.
Does Czech transcription handle Moravian dialects and colloquial Czech?
Czech speech recognition is built around standard Czech, so regional dialects and colloquial Common Czech forms may need review. The Sonix editor syncs text to audio, making it straightforward to check and correct dialect passages.
Should I choose Czech or Slovak for a mixed recording?
Czech and Slovak are separate language selections in Sonix, so choose the language most of the recording is spoken in. For conversations that switch between the two, transcribing each file under its dominant language gives the cleanest starting point.
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Was using another software before, but their prices went up. Your prices are better and the transcription seems more accurate. I also like that you automatically take out all of the filler words - um, you know, etc.
I absolutely love what you guys have done with this. Sonix is literally a magical product that has helped me so much already and I will be using this for a long time coming.
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