Question 1

What is Capsiynau?

Accepted Answer

Capsiynau is an editorial captioning platform built specifically for the Welsh language. Unlike generic services that bolt Welsh on as an afterthought, our engine is purpose-built for Welsh phonetics, treigladau (mutations), and dialect variation - while fully supporting English too. Under the hood we use OpenAI Whisper for transcription and Claude for refinement, but the differentiator is the Welsh-first editorial layer on top.

Question 2

How accurate is the Welsh transcription?

Accepted Answer

Capsiynau uses OpenAI Whisper with a purpose-built 652-term Welsh vocabulary covering place names, mutations, and broadcast terminology. Confidence scores are tracked per segment - low-confidence output is routed to AI refinement, and every project can be sent for professional linguist review. Accuracy improves over time through the learning loop.

Question 3

Can it handle mixed Welsh and English audio?

Accepted Answer

Yes - Capsiynau detects and transcribes both Welsh and English within the same file. Each segment is language-tagged, so you can filter or export by language. Perfect for bilingual broadcasts, meetings, and educational content.

Question 4

What audio and video formats are supported?

Accepted Answer

We support MP3, WAV, MP4, MOV, PDF, and DOCX files. Large media files are compressed during upload. You can also paste a stream URL (m3u8, mp4, mp3) to transcribe directly from a media server.

Question 5

What export formats are available?

Accepted Answer

You can export as SRT (for broadcast), VTT (for web), or plain text. You can filter exports by language (Welsh only, English only, or both) and optionally include speaker labels and timestamps.

Question 6

What are custom glossaries?

Accepted Answer

Glossaries let you define preferred terms - brand names, technical vocabulary, dialect preferences, and formal vs. informal Welsh. The system applies these during transcription and editing, ensuring consistent output. You can import terms from CSV or add them manually.

Question 7

Does Capsiynau learn from my corrections?

Accepted Answer

Yes. Every correction you make in the editor is logged. The learning system analyses patterns - terms corrected 3+ times become vocabulary candidates, and after 10 corrections they are promoted to your word boost for future transcriptions. The system genuinely gets better the more you use it.

Question 8

Is my data secure?

Accepted Answer

Absolutely. Your files and transcripts are handled securely with encryption. Capsiynau is built with public sector and broadcast compliance in mind, including GDPR considerations for bilingual content.

Question 9

Is there a free plan?

Accepted Answer

Yes - the free plan gives you 15 minutes of transcription with the full end-to-end workflow, including Welsh + English support, caption presets, and SRT/VTT export. No credit card required.

Question 10

Who is Capsiynau built for?

Accepted Answer

Capsiynau is designed for Welsh broadcasters (e.g. S4C workflows), public sector organisations needing bilingual accessibility, educators creating Welsh-medium content, and content creators producing bilingual videos for platforms like YouTube and TikTok.

Beth sy'n dod nesaf

Live Voice Relay

Stripe Minutes Purchase

Audience TTS Playback

Custom R2 Domain

Audio Level Visualiser

Dual STT Engine

Mobile Audience Captions

Batch Project Processing

Webhook Notifications

REST API v2