Lua

IBM Cloud - Text to Speech - Synthesize Audio (GET)

See more IBM Text to Speech Examples

Synthesizes text to audio that is spoken in the specified voice. Lua

local chilkat = require("chilkat")

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

local http = chilkat.Http.new()

http.login = "apikey"
http.password = "my_apikey"
http.basic_auth = true

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

local sbUrl = chilkat.StringBuilder.new()
sbUrl:append(myBaseUrl)
sbUrl:append("/v1/synthesize?accept=ACCEPT_TYPE&voice=CHOSEN_VOICE&text=TEXT_TO_SYNTHESIZE")

-- Choose "audio/wav" for the output file type.
local numReplaced = sbUrl:replace("ACCEPT_TYPE", http:url_encode("audio/wav"))
-- See the choices for voices at https://cloud.ibm.com/apidocs/text-to-speech#synthesize-audio-get
numReplaced = sbUrl:replace("CHOSEN_VOICE", "en-US_MichaelVoice")
local textToSynthesize = "When life gives you lemons, order the lobster tail."
numReplaced = sbUrl:replace("TEXT_TO_SYNTHESIZE", http:url_encode(textToSynthesize))

-- Send the GET to synthesize the voice.
-- The response file will be contained in bdResponseBody
local bdResponseBody = chilkat.BinData.new()
local success = http:quick_get_bd(sbUrl:get_as_string(), bdResponseBody)
if not success then
    print(http.last_error_text)
    return
end

local respStatusCode = http.last_status
print("response status code = " .. respStatusCode)

if respStatusCode == 200 then
    success = bdResponseBody:write_file("qa_output/lobster.wav")
    print("Success!")
else
    print(bdResponseBody:get_string("utf-8"))
end