How do I play directly stream the speech to audio out?

[thijse]

Hi,
First of all: thank you for your very useful library! I am aware my question is not directly about your library, but on how to get the output streamed with minimal latency, and I am hoping you have some insights. I try streaming it through the nAudio library:

        public async Task TextToOut(string text)
        {
            // _api is an instance of ElevenLabsClient
            // default voice is set to the first voice in the list
            _voice = (await _api.VoicesEndpoint.GetAllVoicesAsync()).FirstOrDefault();

            // *** Set up the audio stream with NAudio **//
            var memoryStream = new MemoryStream();
            var waveOut      = new WaveOutEvent();
            var waveFormat   = new WaveFormat(24000, 16, 2); // Is this the correct format?
            var rawSource    = new RawSourceWaveStream(memoryStream, waveFormat);
            waveOut.Init(rawSource);
            waveOut.Play();                                                   // can I start playing before the stream clips are added?

            // *** Get the partial voice clips **//
            var voiceClip = await _api.TextToSpeechEndpoint.TextToSpeechAsync(
                text, 
                _voice, 
                null, 
                null, 
                OutputFormat.PCM_24000, 
                null,
                partialClipCallback: async (partialClip) =>
                {
                    await memoryStream.WriteAsync(partialClip.ClipData);      // Write the incoming data to the stream.   
                });
        }

I see that the partialClipCallback is called, but no peep from my speakers. I've tried a few variations but nothing seemed to work. Can you help me?

[thijse]

ps. It might be a nice sample to add to your github, as I expect this is what many people would like to do

[thijse]

Solved it! This works:

        public async Task TextToOut(string text)
        {
            _voice = (await _api.VoicesEndpoint.GetAllVoicesAsync()).FirstOrDefault();

            // Setup BufferedWaveProvider with the correct format
            var waveFormat = new WaveFormat(24000, 16, 1); // Assuming mono channel; adjust if necessary
            var bufferedWaveProvider = new BufferedWaveProvider(waveFormat)
            {
                BufferDuration = TimeSpan.FromSeconds(10), // Set a buffer duration to avoid overflow
                DiscardOnBufferOverflow = true // Discard excess data if the buffer is full
            };

            var waveOut = new WaveOutEvent();
            waveOut.Init(bufferedWaveProvider); // Initialize waveOut with BufferedWaveProvider

            // Start playback immediately
            waveOut.Play();

            // *** Get the partial voice clips *** //
            var voiceClip = await _api.TextToSpeechEndpoint.TextToSpeechAsync(
                text,
                _voice,
                null,
                null,
                OutputFormat.PCM_24000,
                null,
                partialClipCallback: async (partialClip) =>
                {
                    // Write the incoming data to the buffered wave provider
                    bufferedWaveProvider.AddSamples(partialClip.ClipData.ToArray(), 0, partialClip.ClipData.Length);
                });

            // Handle playback stopped event, if needed
            waveOut.PlaybackStopped += (sender, args) =>
            {
                waveOut.Dispose();
            };
        }