1,000 hours of spontaneous two-person conversations in Czech, recorded in Czechia with 100 vetted native speakers. Dual-channel audio, time-aligned human-verified transcripts and speaker metadata, licensed for commercial ASR, TTS and voice AI training.

This repository is the dataset card only. The audio is licensed commercially and isn't hosted on Hugging Face. Free samples (audio, matching transcripts and the metadata schema) are sent on request: request Czech samples.

Specifications


Language	Czech
Recorded in	Czechia
Speech type	Spontaneous two-person conversations
Volume	1,000 hours
Speakers	100 vetted native speakers
Audio	Dual-channel, one channel per speaker
Transcripts	Time-aligned, human-verified
Speaker metadata	Age, gender, region, recording device
Consent	Signed commercial-use consent from every speaker
License	Commercial, for training and evaluation
Price	$90 per hour of audio, volume discounts available

What makes Czech hard for speech recognition

Czech has the "ř" sound found in almost no other language, meaningful vowel length, and seven cases that multiply word forms. Spoken Czech also differs from the written standard, with everyday forms like "dobrej" instead of "dobrý".

Built for

Automatic speech recognition (ASR / STT)
Text-to-speech and voice synthesis prosody
Voice agents and IVR for Czechia
Speaker diarization and turn-taking models
Speech LLM and audio-understanding fine-tuning

Getting the data

Request samples with a company email on the Czech dataset page and the team replies with representative audio and transcripts so you can check quality, accents and transcript conventions before you buy. Need more hours, another dialect or your own recording setup? SpeechData.ai also collects speech data to spec, or you can book a call.

About SpeechData.ai

SpeechData.ai licenses conversational speech datasets in 60 languages and dialects and runs custom speech data collection. It's part of Spirelight. Browse the full catalog.

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