fix(minimax): normalize tts pitch for api

extensions/minimax/speech-provider.test.ts

@@ -309,7 +309,13 @@ describe("buildMinimaxSpeechProvider", () => {
         text: "Test",
         cfg: {} as never,
         providerConfig: { apiKey: "sk-test" },
-        providerOverrides: { model: "speech-01-240228", voiceId: "custom_voice", speed: 1.5 },
+        providerOverrides: {
+          model: "speech-01-240228",
+          voiceId: "custom_voice",
+          speed: 1.5,
+          vol: 1.5,
+          pitch: 0.5,
+        },
         target: "audio-file",
         timeoutMs: 30000,
       });
@@ -318,6 +324,8 @@ describe("buildMinimaxSpeechProvider", () => {
       expect(body.model).toBe("speech-01-240228");
       expect(body.voice_setting.voice_id).toBe("custom_voice");
       expect(body.voice_setting.speed).toBe(1.5);
+      expect(body.voice_setting.vol).toBe(1.5);
+      expect(body.voice_setting.pitch).toBe(0);
     });
 
     it("throws when API key is missing", async () => {

extensions/minimax/tts.ts

@@ -24,6 +24,10 @@ export function normalizeMinimaxTtsBaseUrl(baseUrl?: string): string {
   return trimmed.replace(/\/+$/, "");
 }
 
+function normalizeMinimaxTtsPitch(pitch: number): number {
+  return Math.trunc(pitch);
+}
+
 export async function minimaxTTS(params: {
   text: string;
   apiKey: string;
@@ -70,7 +74,7 @@ export async function minimaxTTS(params: {
             voice_id: voiceId,
             speed,
             vol,
-            pitch,
+            pitch: normalizeMinimaxTtsPitch(pitch),
           },
           audio_setting: {
             format,