Public demo — no Google sign-in, no mic, no private data. Open full app →

Xylaphone Tango

Voice PWA · Groq primary · Grok fallback · streaming NDJSON · device topic cache

Demo User

demo@xylaphonetango.com · 3/25 topics · Free

Tap Play to stream a sample reply from the Worker

YOU

What is Xylaphone Tango?

AGENT

Waiting for demo stream…

Sample topic cache (per device)

06/20 · dentist checkup
06/22 · weather seattle
06/25 · voice agent demo

Stores dates + topics only — not full chat transcripts.

Architecture

App: https://xylaphonetango.com (Cloudflare Pages)
API: voice-agent-backend.7zzkwwb7hd.workers.dev (Cloudflare Worker + D1)
Auth: Google Sign-In (GSI) — required for chat; this page is public
LLM: Groq Llama 3.1 8B instant → xAI Grok 4.3 fallback
Streaming: application/x-ndjson tokens + done event
Public demo API: GET /demo (no auth) — same stream format
Voice: Web Speech API (browser STT + TTS) — not available to crawlers

Paste this page or /demo.html into Grok Chat for layout + architecture. For code review, share the GitHub repo or paste public/index.html and src/index.ts.