Add C# and JavaScript (wasm) API for MatchaTTS models (#1682)

nodejs-examples/test-offline-tts-matcha-en.js

@@ -0,0 +1,40 @@
+// Copyright (c)  2025  Xiaomi Corporation (authors: Fangjun Kuang)
+
+const sherpa_onnx = require('sherpa-onnx');
+
+function createOfflineTts() {
+  let offlineTtsMatchaModelConfig = {
+    acousticModel: './matcha-icefall-en_US-ljspeech/model-steps-3.onnx',
+    vocoder: './hifigan_v2.onnx',
+    lexicon: './matcha-icefall-en_US-ljspeech/lexicon.txt',
+    tokens: './matcha-icefall-en_US-ljspeech/tokens.txt',
+    dataDir: './matcha-icefall-en_US-ljspeech/espeak-ng-data',
+
+    noiseScale: 0.667,
+    lengthScale: 1.0,
+  };
+  let offlineTtsModelConfig = {
+    offlineTtsMatchaModelConfig: offlineTtsMatchaModelConfig,
+    numThreads: 1,
+    debug: 1,
+    provider: 'cpu',
+  };
+
+  let offlineTtsConfig = {
+    offlineTtsModelConfig: offlineTtsModelConfig,
+    maxNumSentences: 1,
+  };
+
+  return sherpa_onnx.createOfflineTts(offlineTtsConfig);
+}
+
+const tts = createOfflineTts();
+const speakerId = 0;
+const speed = 1.0;
+const text =
+    'Today as always, men fall into two groups: slaves and free men. Whoever does not have two-thirds of his day for himself, is a slave, whatever he may be: a statesman, a businessman, an official, or a scholar.'
+
+const audio = tts.generate({text: text, sid: speakerId, speed: speed});
+tts.save('./test-matcha-en.wav', audio);
+console.log('Saved to test-matcha-en.wav successfully.');
+tts.free();