Church Translate, as it runs at the campuses

Live sermon translation into 100+ languages, running entirely on one Mac per
campus: audio in, voice detection, Whisper on the GPU, NLLB-200 in its own
process, and a built-in web server the congregation reads from on their
phones. No audio leaves the building.

This is the source only. What used to sit beside it — 14 GB of speech and
translation models, 8 GB of voice bundles, 6 GB of natural voices, the Electron
caches, and the app data holding the operator PIN and every service transcript
— is machine state and downloaded assets, and stays in the NAS backup where it
belongs. The vendored node, cloudflared and Windows ffmpeg binaries are out too
(533 MB, re-fetched for packaging); the browser-side runtime beside them is
kept, so a checkout still serves the congregation page.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/_test-zh.js

@@ -0,0 +1,35 @@
+/* Load and speak with every Chinese bundle the picker offers, plus a Piper
+   voice to prove the espeak path did not regress. */
+const path=require('path'), os=require('os');
+const voices=require('./voices.js');
+const sherpa=require('sherpa-onnx-node');
+const DIR=path.join(os.homedir(),'Library/Application Support/Church Translate Voices');
+const C=require('./voice-catalog.js');
+
+const TEXT='耶稣说，我就是道路、真理、生命。';
+const cases=C.forLanguage('zho_Hans').filter(v=>v.engine==='builtin')
+  .map(v=>({bundle:v.bundle,model:v.model,text:TEXT}));
+cases.push({bundle:'vits-piper-de_DE-thorsten-medium',model:'de_DE-thorsten-medium.onnx',
+            text:'Jesus sprach: Ich bin der Weg.'});
+
+let ok=0,bad=0;
+for (const c of cases) {
+  const dir=path.join(DIR,c.bundle);
+  try {
+    const cfg=voices.ttsConfig(dir,{model:c.model});
+    const which=cfg.model.vits.lexicon?'lexicon':'espeak';
+    const t=new sherpa.OfflineTts(cfg);
+    const a=t.generate({text:c.text,sid:0,speed:1.0});
+    const secs=a.samples.length/a.sampleRate;
+    /* Silence means it "worked" but produced nothing — that is still a failure. */
+    let peak=0; for(let i=0;i<a.samples.length;i++){const v=Math.abs(a.samples[i]); if(v>peak)peak=v;}
+    const dead=peak<0.01;
+    console.log((dead?'  SILENT ':'  OK     ')+c.bundle.padEnd(38)+which.padEnd(9)+
+                secs.toFixed(1)+'s  peak '+peak.toFixed(3)+'  @'+a.sampleRate);
+    dead?bad++:ok++;
+  } catch(e) {
+    console.log('  FAIL   '+c.bundle.padEnd(38)+String(e.message).split('\n')[0].slice(0,70));
+    bad++;
+  }
+}
+console.log('\n'+ok+' usable, '+bad+' not');