Africa · Angola
Portuguese (African) conversational speech dataset
500 hours of spontaneous Portuguese (African) conversations recorded in Angola across 50 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 | Portuguese (African) |
|---|---|
| Recorded in | Angola |
| Speech type | Spontaneous two-person conversations |
| Volume | 500 hours |
| Speakers | 50 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 | $65 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 Portuguese (African) speech:
- Automatic speech recognition (ASR / STT)
- Text-to-speech & voice synthesis prosody
- Voice agents and IVR for Angola
- 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 Portuguese (African). Read more in our guide to conversational vs. scripted speech data.
Free samples
Audit the Portuguese (African) 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 Angolan Portuguese speech data vs. this dataset
| Source | What it is | License | Commercial training |
|---|---|---|---|
| Mozilla Common Voice Portuguese (Scripted Speech) (opens in a new tab)Mozilla Common Voice (via Mozilla Data Collective) | Portuguese sentences read by volunteers, not Angola-specific; no Spontaneous Speech release for Portuguese. | CC0 1.0 | Allowed |
| Multilingual LibriSpeech (MLS) Portuguese (opens in a new tab)Meta AI (via OpenSLR) | Portuguese read audiobooks from LibriVox with transcripts. | CC BY 4.0 | Allowed |
None of the free corpora listed is specific to Angola; they are audiobooks and volunteer read speech. This dataset is spontaneous two-person conversation recorded in Angola, licensed commercially.
Licenses as published by each source, checked October 2026. Check the current terms before use.
FAQ
Frequently asked questions
What does the Portuguese (African) speech dataset include?
500 hours of spontaneous two-person conversations from 50 vetted native speakers recorded in Angola, delivered as dual-channel audio with time-aligned transcripts, speaker metadata (age, gender, region, device), and consent documentation.
What makes Angolan Portuguese hard for speech recognition?
Angolan Portuguese is the first language of a growing share of Angolans and carries Kimbundu, Umbundu and Kikongo influence in vocabulary and rhythm. It sounds different from both European and Brazilian Portuguese, and very little public speech data exists for it.
Is there free Angolan Portuguese speech data?
None specific to Angola, but Mozilla Common Voice Portuguese and Multilingual LibriSpeech Portuguese are free for commercial use. This dataset is spontaneous two-person conversation recorded in Angola, with speaker metadata, one channel per speaker and signed commercial-use consent.
Can I use this Portuguese (African) 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 Portuguese (African) speech dataset cost?
Pricing is $65 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