Europe · Slovakia
Slovak conversational speech dataset
1,000 hours of spontaneous Slovak conversations recorded in Slovakia across 100 vetted native speakers. Dual-channel audio with time-aligned transcripts, speaker metadata (age, gender, region, device), and full chain-of-consent documentation. Licensed for commercial ASR, TTS, and voice AI training.
Dataset specifications
| Language | Slovak |
|---|---|
| Recorded in | Slovakia |
| 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 |
| Metadata | Age, gender, region, recording device |
| License | Commercial (training & evaluation) |
| Price | $90 per hour of audio |
Need more hours, another dialect or your own recording setup? We collect speech data to spec.
Built for
Training and evaluating speech models that must handle real Slovak speech:
- Automatic speech recognition (ASR / STT)
- Text-to-speech & voice synthesis prosody
- Voice agents and IVR for Slovakia
- Speaker diarization & turn-taking models
- Speech LLM / audio-understanding fine-tuning
Why conversational data?
Models trained on read speech consistently underperform on spontaneous audio. Disfluencies, overlap, and natural speech rates aren’t in the training distribution. This dataset closes that gap for Slovak. Read more in our guide to conversational vs. scripted speech data.
Free samples
Audit the Slovak data yourself
Share your company email and we’ll email you representative audio, matching transcripts, and the metadata schema. Check audio quality, transcript accuracy, and speaker diversity before you spend a dollar.
Public alternatives
Public Slovak speech data vs. this dataset
| Source | What it is | License | Commercial training |
|---|---|---|---|
| SloPalSpeech (opens in a new tab)NaiveNeuron (Erik Božík and Marek Šuppa), on Hugging Face | Slovak National Council plenary recordings aligned with official transcripts, cut into clips of 30 seconds or less; 2,806 hours. | CC BY 4.0 | Allowed |
| VoxPopuli (opens in a new tab)Meta (facebookresearch) | European Parliament event recordings from 2009 to 2020, with 35 hours of transcribed Slovak speech. | CC0 for the VoxPopuli data; the raw audio falls under the European Parliament legal notice | Unclear |
| Mozilla Common Voice Scripted Speech 27.0 (opens in a new tab)Mozilla Foundation (Mozilla Data Collective) | Read speech: short clips of people reading given Slovak sentences aloud, with the sentence as transcript; 58 hours recorded, 57 hours validated. | CC0 1.0 | Allowed |
| FLEURS (opens in a new tab)Google | Read sentences from the FLoRes translation benchmark, recorded for 102 languages; training sets hold around 10 hours per language. | CC BY 4.0 | Allowed |
The listed Slovak sets are parliamentary speeches or read sentences; ours is spontaneous two-person conversation recorded in Slovakia, one channel per speaker, with speaker metadata.
Licenses as published by each source, checked October 2026. Check the current terms before use.
FAQ
Frequently asked questions
What does the Slovak speech dataset include?
1,000 hours of spontaneous two-person conversations from 100 vetted native speakers recorded in Slovakia, delivered as dual-channel audio with time-aligned transcripts, speaker metadata (age, gender, region, device), and consent documentation.
What makes Slovak hard for speech recognition?
Slovak is close to Czech but has its own sounds, such as long syllabic "l" and "r" ("vŕba", "stĺp"), and a rhythmic rule that shortens long vowels after a long syllable. Models trained on Czech confuse the two, so Slovak needs its own native recordings.
Is there free Slovak speech data?
Yes, SloPalSpeech, Mozilla Common Voice and FLEURS are free for commercial use. VoxPopuli has unclear terms. This dataset is spontaneous two-person conversation recorded in Slovakia, with speaker metadata, one channel per speaker and signed commercial-use consent.
Can I use this Slovak dataset commercially?
Yes. The dataset is licensed for commercial use, including training ASR, TTS, and other voice-AI models. Every speaker has signed explicit commercial-use consent, and we provide the full consent chain for your legal review.
How much does the Slovak speech dataset cost?
Pricing is $90 per hour of audio. Volume discounts are available for full-dataset and multi-language purchases. Contact us for a quote.
Can I evaluate samples before buying?
Yes. Request samples with your company email, and we'll email you representative audio files and matching transcripts so your team can audit quality before committing.
$85/hr