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libraries/audio-tools/examples/examples-tts/streams-azure_tts-i2s/streams-azure_tts-i2s.ino

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+/**
+ * @file streams-azure_tts-i2s.ino
+ * @author Kevin Saye
+ * @copyright GPLv3
+ * 
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/Communication/AudioHttp.h"
+    
+String speechKey = "....";              // deploy a Speech Service in Azure and get both the key and the region. info here: https://azure.microsoft.com/en-us/products/cognitive-services/text-to-speech/
+String spechregion = "....";
+String voice = "en-US-JennyNeural";     // for the next 3 settings, chose from: https://learn.microsoft.com/en-us/azure/cognitive-services/speech-service/language-support?tabs=stt#prebuilt-neural-voices
+String gender = "Female";
+String language = "en-US";
+String url_str = "https://" + spechregion + ".tts.speech.microsoft.com/cognitiveservices/v1";
+String msg = "This is a demonstration of Phil Schatzmann's AudioTools integrating with the Azure Speech Service.  Hope you like it.";
+
+URLStream AzureURLStream("ssid", "pwd");
+I2SStream i2s;                          // or I2SStream 
+StreamCopy copier(i2s, AzureURLStream); // copy in to out
+
+void setup(){
+  Serial.begin(115200);  
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);  
+
+  // setup i2s
+  auto config = i2s.defaultConfig(TX_MODE);
+  config.sample_rate = 8000; 
+  config.bits_per_sample = 16;
+  config.channels = 1;
+  config.pin_ws = GPIO_NUM_12;            //LCK
+  config.pin_bck = GPIO_NUM_13;           //BCK
+  config.pin_data = GPIO_NUM_21;          //DIN
+  i2s.begin(config);
+
+  // Source: https://learn.microsoft.com/en-us/azure/cognitive-services/speech-service/get-started-text-to-speech?tabs=windows%2Cterminal&pivots=programming-language-rest
+  String ssml = "<speak version='1.0' xml:lang='" + language + "'><voice xml:lang='" + language + "' xml:gender='" + gender + "' name='" + voice + "'>" + msg + "</voice></speak>";
+  AzureURLStream.addRequestHeader("Ocp-Apim-Subscription-Key", speechKey.c_str());
+  AzureURLStream.addRequestHeader("X-Microsoft-OutputFormat", "raw-8khz-16bit-mono-pcm");   // if you change this, change the settings for i2s and the decoder
+  AzureURLStream.addRequestHeader(USER_AGENT, String("Arduino with Audiotools version:" + String(AUDIOTOOLS_VERSION)).c_str());
+
+  AzureURLStream.begin(url_str.c_str(), "audio/wav", POST, "application/ssml+xml",  ssml.c_str());  
+}
+
+void loop(){
+  copier.copy();
+}