(VB.NET) 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

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Dim http As New Chilkat.Http
Dim success As Boolean

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)
Dim myBaseUrl As String = "https://api.us-south.text-to-speech.watson.cloud.ibm.com/instances/31941e96-7b89-4d56-8993-9cd8f18ec2d8"

Dim sbUrl As New Chilkat.StringBuilder
sbUrl.Append(myBaseUrl)
sbUrl.Append("/v1/synthesize?voice=en-US_AllisonV3Voice")

http.Accept = "audio/wav"

Dim json As New Chilkat.JsonObject
json.UpdateString("text","When life gives you lemons, order the lobster tail.")

Dim resp As Chilkat.HttpResponse = http.PostJson3(sbUrl.GetAsString(),"application/json",json)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If

Dim respStatusCode As Integer = resp.StatusCode
Debug.WriteLine("response status code = " & respStatusCode)

If (respStatusCode = 200) Then
    success = resp.SaveBodyBinary("qa_output/lobster.wav")
    Debug.WriteLine("Success!")
Else
    Debug.WriteLine(resp.BodyStr)
End If