Cepstral David Voice Work -

| Metric | Target for “David” | |--------|--------------------| | Cepstral Distance (CD) to reference | < 4 dB | | Mel Cepstral Distortion (MCD) | < 3 dB for naturalness | | Pitch correlation (quefrency peak) | 0.85–0.95 | | Formant deviation (F1–F3) | < 10% relative |

Cepstral David is a high-performance synthetic voice developed by Cepstral LLC, a prominent speech synthesis company based in Pittsburgh, Pennsylvania. Known for its natural intonation and crisp American English accent, "David" is widely utilized in assistive technologies, telephony systems, and personal productivity applications. cepstral david voice work

Cepstral David uses a modified version of SSML (Speech Synthesis Markup Language). The standard say-as tags work, but the magic is in the rhythm tags. The standard say-as tags work, but the magic

The Problem: David sometimes pauses unnaturally at commas or rushes through possessives. The Solution: Use \** (prosodic breaks). Bad input: "Hello

Bad input: "Hello. My name is David." Result: Staccato, robotic.

Good input: Hello <break strength="medium"/> my name is David. Result: Natural intonation.

Pro Tip for David: He struggles with acronyms. "NASA" sounds like "Nah-sa" unless you spell it "N. A. S. A." or use the phoneme tag.