Play MP3 using SoundPlayer after conversion to WAV using NAudio

Question

I want to play MP3 file downloaded from the web using NET provided System.Media.SoundPlayer mechanism. As it works with WAV formats, it requires the support of e.g. NAudio l

Answer 1

Based on Lee Harrison answer, I've created alternative code which is better.

(3) plays directly MP3 file from WEB without conversion to WAV and without usage of disk operations:

public void Speak(Uri mp3FileUri)
{
    using (var client = new WebClient())
    {
        using (var networkStream = client.OpenRead(mp3FileUri))
        {
            if (networkStream != null)
            {
                using (var memStream = new MemoryStream())
                {
                    networkStream.CopyTo(memStream);
                    memStream.Position = 0;                            
                    using (var waveOut = new WaveOut(WaveCallbackInfo.FunctionCallback()))
                    {
                        var waveEvent = new ManualResetEvent(false);
                        waveOut.PlaybackStopped += (sender, e) => waveEvent.Set();
                        waveEvent.Reset();
                        using (var rdr = new Mp3FileReader(memStream))
                        using (var waveStream = WaveFormatConversionStream.CreatePcmStream(rdr))
                        using (var baStream = new BlockAlignReductionStream(waveStream))
                        {
                            waveOut.Init(baStream);
                            waveOut.Play();
                            if (waveOut.PlaybackState != PlaybackState.Stopped)
                            { 
                                waveEvent.WaitOne(); /* block thread for a while because I don't want async play back                                
                                                        (to be analogical as usage of SoundPlayer Play method) */
                            }
                        }
                    }
                }
            }
        }
    }
}

Nevertheless (despite this is quite good for me), I still don't know what's the problem with sample (2).

Answer 2

Why not skip using SoundPlayer and play the MP3 directly through NAudio? NAudio was designed to do this. Just download the MP3 into a temp file somewhere, and play it with NAudio, and delete the temp file once your finished with it. I don't think anything can be done to reduce a delay while downloading the file though.

http://naudio.codeplex.com/wikipage?title=MP3