wip

lib/synth-audio.js

@@ -169,7 +169,8 @@ async function synthAudio(client, createHash, retrieveHash, logger, stats, { acc
     language: language || '',
     voice: voice || deploymentId,
     engine,
-    model,
+    // model or model_id is used to identify the tts cache.
+    model: model || credentials.model_id,
     text
   });