(.NET Core C#) IBM Cloud - Text to Speech - Synthesize Audio (POST)

Synthesizes text to audio that is spoken in the specified voice. Uses a POST which allows for more text to be synthesized.

For more information, see https://cloud.ibm.com/apidocs/text-to-speech#synthesize-audio

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();
bool success;

http.Login = "apikey";
http.Password = "my_apikey";
http.BasicAuth = true;

// Send the following request:

// curl -X POST -u "apikey:{apikey}" 
//    --header "Content-Type: application/json" 
//    --header "Accept: audio/wav" 
//    --data "{\"text\":\"When life gives you lemons, order the lobster tail.\"}" 
//    --output lobster.wav "{url}/v1/synthesize?voice=en-US_AllisonV3Voice"

// Use your base URL shown in the credentials web page (below your apikey)
string myBaseUrl = "https://api.us-south.text-to-speech.watson.cloud.ibm.com/instances/31941e96-7b89-4d56-8993-9cd8f18ec2d8";

Chilkat.StringBuilder sbUrl = new Chilkat.StringBuilder();
sbUrl.Append(myBaseUrl);
sbUrl.Append("/v1/synthesize?voice=en-US_AllisonV3Voice");

http.Accept = "audio/wav";

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("text","When life gives you lemons, order the lobster tail.");

Chilkat.HttpResponse resp = http.PostJson3(sbUrl.GetAsString(),"application/json",json);
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

int respStatusCode = resp.StatusCode;
Debug.WriteLine("response status code = " + Convert.ToString(respStatusCode));

if (respStatusCode == 200) {
    success = resp.SaveBodyBinary("qa_output/lobster.wav");
    Debug.WriteLine("Success!");
}
else {
    Debug.WriteLine(resp.BodyStr);
}