support rimelabs coda (#142)

lib/synth-audio.js

@@ -1136,6 +1136,8 @@ const synthRimelabs = async(logger, {
     if (opts.repetition_penalty) params += `,repetition_penalty=${opts.repetition_penalty}`;
     if (opts.top_p) params += `,top_p=${opts.top_p}`;
     if (opts.max_tokens) params += `,max_tokens=${opts.max_tokens}`;
+    // Coda model parameters
+    if (opts.timeScaleFactor) params += `,time_scale_factor=${opts.timeScaleFactor}`;
     params += '}';
 
     return {