Tamil Nadu · studio network
Speech Data Collection in Chennai
Chennai is one of the recording sites in our nationwide network. Madras Bashai colloquial Tamil, sharply different from literary Tamil used in read-speech corpora.
- State
- Tamil Nadu
- Languages
- 3
- Setup
- Treated booth with dual-channel conversation capability.
Why we record in Chennai
The reference site for Tamil, and the strongest city in the network for diglossia work — the gap between literary and spoken Tamil is where most Tamil ASR fails.
Chennai Tamil with a substantial Telugu-speaking population of long standing, plus Malayalam and Indian English. The formal-to-colloquial register split is the defining feature for data purposes.
Languages recorded here
- Tamil
- Indian English
- Telugu
Dialect profile
Madras Bashai colloquial Tamil, sharply different from literary Tamil used in read-speech corpora.
Recruitment pool
Deep Tamil pool; district screening needed to avoid an all-Chennai accent profile.
Over-represents urban Chennai Tamil. Kongu, Madurai and Nellai varieties need Coimbatore and southern districts to be covered properly.
City choice is a data-quality decision, not a logistics decision. It determines which dialects end up in your corpus.
Studio setup
Treated booth with dual-channel conversation capability.
Running sessions in Chennai
Reliable studio capacity and strong transcriber supply, which matters because Tamil transcription is where the throughput bottleneck usually sits. The monsoon window causes real disruption to field schedules.
Field recording conditions here
Coastal ambience, market interiors and heavy two-wheeler traffic noise.
The numbers we hold ourselves to
- 100% of delivered files pass automated technical QA for SNR, clipping, duration and silence
- 5-25% of files pass a second native-speaker content review, stratified by city, dialect and transcriber, and escalating to 100% on any batch that fails the agreed threshold
- Accepted yield runs 85-90% for scripted speech, 60-70% for spontaneous, 55-65% for conversational and 50-60% for telephony
- Default cohort quotas: 50/50 gender, with age bands at 30% (18-25), 40% (26-40) and 30% (41-60)
- 48 kHz / 24-bit capture, delivered as 16-bit PCM WAV, with studio sessions held below a -50 dBFS noise floor
- First response within one working day; a scoped, fixed quote within two to three
These are the figures a delivery is measured against, not aspirations. A batch that misses them is re-recorded at our cost rather than repaired.
What every session includes
- Local coordinators recruit and screen against your quota matrix
- Participants are briefed and consented on site
- Sessions run to the same template as every other city in the network
- Technical QA runs on upload, so defects are caught while the speaker can still be recalled
Frequently asked
Can you record in Chennai only?
You can, but be clear about what that buys you. Over-represents urban Chennai Tamil. Kongu, Madurai and Nellai varieties need Coimbatore and southern districts to be covered properly. For most languages we recommend spreading the cohort across at least three cities.
How fast can sessions start in Chennai?
Recruitment typically takes one to two weeks depending on how narrow your quotas are. Reliable studio capacity and strong transcriber supply, which matters because Tamil transcription is where the throughput bottleneck usually sits. The monsoon window causes real disruption to field schedules.
What does field recording in Chennai sound like?
Coastal ambience, market interiors and heavy two-wheeler traffic noise. Every session's noise profile is documented so you can match it against your deployment environment.
Which languages are strongest in Chennai?
Tamil, Indian English, Telugu. Deep Tamil pool; district screening needed to avoid an all-Chennai accent profile.
Record in Chennai
Send the language, speaker count and conditions you need.