Service explainers
What is call centre speech data and how does it work?
Updated 2026-08-01 · 4 min read
Short answer
Simulated and consented real-world contact-centre audio in Indian languages, recorded over telephony-grade channels so it matches the bandwidth your production system actually sees. In practice the work runs as scenario library built from your call taxonomy, then agent-side speakers briefed on your script and tone, then recording over the specified codec path, and you receive dual-channel call audio, verbatim transcripts. 3-6 weeks for 100-250 hours.
Key takeaways
- Narrowband is simulated at capture time, not by downsampling clean studio audio, which would leave unrealistic artefacts.
- Typical buyers: Contact-centre AI, Call analytics, Agent assist.
- Recruitment approach: Speakers with and without prior contact-centre experience, mixed to the ratio you specify.
What the service covers
Simulated and consented real-world contact-centre audio in Indian languages, recorded over telephony-grade channels so it matches the bandwidth your production system actually sees.
- Dual-channel call audio
- Verbatim transcripts
- Intent, outcome and sentiment labels
- Scenario coverage matrix
Technical specification
These are defaults, not limits. Where your pipeline requires different values, they replace ours in the statement of work rather than being converted after delivery.
| Parameter | Standard |
|---|---|
| Channel | 8 kHz narrowband telephony plus 48 kHz reference where required |
| Codec | G.711 / Opus simulated to match your stack |
| Structure | Agent and customer on separate channels |
| Scenarios | Billing, delivery, KYC, recharge, collections, support, sales |
| Emotion | Neutral, frustrated and escalated variants on request |
How the work runs
- Scenario library built from your call taxonomy
- Agent-side speakers briefed on your script and tone
- Recording over the specified codec path
- Transcription with intent and outcome labels
- Delivery with per-scenario counts
Quality control and acceptance
Narrowband is simulated at capture time, not by downsampling clean studio audio, which would leave unrealistic artefacts.
Failures are remedied by re-collection rather than by editing delivered files, because repaired audio carries artefacts that survive into the trained model.
Who this is for
Recruitment for this service works as follows. Speakers with and without prior contact-centre experience, mixed to the ratio you specify.
- Contact-centre AI
- Call analytics
- Agent assist
- Voice bots
Timelines
3-6 weeks for 100-250 hours.
Multi-language programmes run in parallel rather than in sequence, so a five-language scope does not take five times as long.
Frequently asked questions
What is included in call centre speech data?
Dual-channel call audio, Verbatim transcripts, Intent, outcome and sentiment labels, delivered against a written specification with acceptance criteria attached.
How long does call centre speech data take?
3-6 weeks for 100-250 hours.
How is quality measured?
Narrowband is simulated at capture time, not by downsampling clean studio audio, which would leave unrealistic artefacts.
Which languages are supported?
Fifteen Indian languages plus Indian English, including Hindi, Marathi, Tamil, Telugu, Kannada.
Related reading
Turn this into a dataset specification
Tell us the languages, speaker count and minutes. You get a written scope, a protocol and a fixed price within one working day.