AudioTextToSpeech

local audioTextToSpeech : AudioTextToSpeech = Instance.new("AudioTextToSpeech")
audioTextToSpeech.Parent = workspace
audioTextToSpeech.Text = "Hello! Converting text into speech is fun!"
audioTextToSpeech.VoiceId = "1"

local deviceOutput = Instance.new("AudioDeviceOutput")
deviceOutput.Parent = workspace

local wire = Instance.new("Wire")
wire.Parent = workspace

wire.SourceInstance = audioTextToSpeech
wire.TargetInstance = deviceOutput

local count = 0

local connection = nil
connection = audioTextToSpeech.Ended:Connect(function() 
  audioTextToSpeech.Text = "I can count to " .. count .. " because I am very smart"
  audioTextToSpeech.VoiceId = "2"
  audioTextToSpeech.TimePosition = 0
  audioTextToSpeech:Play()
  
  count += 1
  
  if count > 10 then
    connection:Disconnect()
  end
end)

audioTextToSpeech:Play()