well if you're mixing them with a MixingSampleProvider, then you need to create an intermediate stream between the BufferedWaveProvider and the Mixer so that it can return 0s in its Read method while buffering is still working. The mixer will always try to read out of all the inputs so they have to return something.
↧
New Post: Network Chat Multi-Client Program
↧
New Post: IWaveProvider - streaming 16Bit PCM audio
great, glad you worked it out
↧
↧
New Post: Sample Aggregation For WASAPI Loopback
Is it possible to use the event driven mode with loopback capture?
Working through how you have implemented it in WasapiOut the audioClient can only be initialised with either AudioClientStreamFlags.EventCallback or AudioClientStreamFlags.Loopback, not both?
Working through how you have implemented it in WasapiOut the audioClient can only be initialised with either AudioClientStreamFlags.EventCallback or AudioClientStreamFlags.Loopback, not both?
↧
New Post: Play same file multiple times using WaveOutEvent
Hello sir,
I tried using AudioFileReader in the way that you suggested and it is working as you said. That means re-positioning to the start should work for me.
So I was trying to find out what is going wrong and I found that when you call Play for the second time, the PlaybackThread waits infinitely at callbackEvent.WaitOne() call. Now this might be because when 1st PlaybackThread completes reading all the buffers and exits, callbackEvent must be remaining in non signaled state. Is it the case? and if yes then Should we call callbackEvent.Set() before exiting from the PlaybackThread?
I have one more doubt, how come callbackEvent.WaitOne() is returning immediately for the first time? (I have this doubt because you have initialized callbackEvent with initial state as non signaled!)
I tried using AudioFileReader in the way that you suggested and it is working as you said. That means re-positioning to the start should work for me.
So I was trying to find out what is going wrong and I found that when you call Play for the second time, the PlaybackThread waits infinitely at callbackEvent.WaitOne() call. Now this might be because when 1st PlaybackThread completes reading all the buffers and exits, callbackEvent must be remaining in non signaled state. Is it the case? and if yes then Should we call callbackEvent.Set() before exiting from the PlaybackThread?
I have one more doubt, how come callbackEvent.WaitOne() is returning immediately for the first time? (I have this doubt because you have initialized callbackEvent with initial state as non signaled!)
↧
Updated Wiki: Home
NAudio Overview
NAudio is an open source .NET audio and MIDI library, containing dozens of useful audio related classes intended to speed development of audio related utilities in .NET. It has been in development since 2002 and has grown to include a wide variety of features. While some parts of the library are relatively new and incomplete, the more mature features have undergone extensive testing and can be quickly used to add audio capabilities to an existing .NET application. NAudio can be quickly added to your .NET application using NuGet.NAudio demo project showing an MP3 file playing:
NAudio WPF Project showing waveform visualisation and spectrum analyser:
Latest News
For the latest news and more documentation on NAudio, visit Mark Heath's blog.- 26 Oct 2012 NAudio 1.6 Released. Read the release notes
- 9 Sep 2012 ASIO Recording Support added
- 19 Dec 2011 NAudio 1.5 Released. Read the release notes
- 20 Apr 2011 NAudio 1.4 Released. Read the release notes
- 15 Apr 2011 NAudio demo now shows how to select output devices (for WaveOut, DirectSound, WASAPI and ASIO), and can play 8 bit, 16 bit, 24 bit, and 32 bit float WAV files. Fixed a longstanding ASIO issue.
- 7 Nov 2010 Major improvements to Mp3FileReader
- 10 Oct 2009 Version 1.3 Released. Read the release notes
- 20 Sep 2009 We are getting close to feature complete for 1.3. Last chance to get in any feedback on the API
- 26 Aug 2009 WPF Waveform drawing demo project including FFT added
- 28 Feb 2009 Lots of new stuff is being added and planned, so do check out the Source Code tab to have a sneak peak at what's coming in 1.3
- 26 June 2008 Version 1.2 Released. Read the release notes
NAudio Features
- Play back audio using a variety of APIs
- WaveOut
- DirectSound
- ASIO
- WASAPI (Windows Vista and above)
- Decompress audio from different Wave Formats
- MP3 decode using ACM or DMO codec
- AIFF
- G.711 mu-law and a-law
- ADPCM
- G.722
- Speex (using NSpeex)
- SF2 files
- Decode using any ACM codec installed on your computer
- Record audio using WaveIn, WASAPI or ASIO
- Read and Write standard .WAV files
- Mix and manipulate audio streams using a 32 bit floating mixing engine
- Extensive support for reading and writing MIDI files
- Full MIDI event model
- Basic support for Windows Mixer APIs
- A collection of useful Windows Forms Controls
- Some basic audio effects, including a compressor
Projects Using NAudio
NAudio currently is used to support a number of audio related utilities, some of which may be moved to be hosted on CodePlex in the future. If you have used NAudio for a project, please get in touch so we can post it here.- Skype Voice Changer - Modify your voice with audio effects while talking on Skype
- .NET Voice Recorder - Record your voice, save to MP3, and visualise the waveform using WPF. Now includes autotune
- MIDI File Mapper - Utility for mapping MIDI drum files for use on other samplers
- MIDI File Splitter - Split MIDI files up at their markers
- SharpMod - managed port of MikMod, can play mod files in both WinForms and Silverlight
- NVorbis - Fully managed Vorbis decoder, with support for NAudio
- Practice# - Windows tool for practicing playing an instrument with playback music. Includes FLAC playback support and an equaliser for NAudio.
- WPF Sound Visualization Library - beautiful waveform and spectrum analyzer code written for WPF, comes with NAudio sample
- Sound Mill - an audio player, list organizer and automation manager
- Bravura Studio - a modular, extensible application and platform for creating and experimenting with music and audio.
- SIPSorcery - .NET softphone framework
- Squiggle - A free open source LAN Messenger
- Helix 3D toolkit
- airphone-tv - A revival of axStream to implement control through the iPhone
- JamNet - a Silverlight drum sample player
- Jingle Jim - Jingle Software (German language)
- All My Music
- iSpy - Open Source Camera Security Software
- RadioTuna - Online internet radio player
- Fire Talk New - chat program
- AVR Audio Guard - utility to fix a HDMI related issue
More Info
For more information, please visit the NAudio Documentation WikiDonate
NAudio is a free open source project that is developed in personal time. You can show your appreciation for NAudio and support future development by donating.↧
↧
New Post: Sample Aggregation For WASAPI Loopback
they are flags, so you would OR them together
↧
New Post: Play same file multiple times using WaveOutEvent
can you try the fix suggested here, and see if that resolves it for you?
http://naudio.codeplex.com/discussions/357995#post844154
It's something on my TODO list for NAudio 1.7, but I've not got round to putting it in yet.
Mark
http://naudio.codeplex.com/discussions/357995#post844154
It's something on my TODO list for NAudio 1.7, but I've not got round to putting it in yet.
Mark
↧
New Post: If signal is already stereo, how do I pan left/right?
I was using the PanningSampleProvider to convert a mono to a stereo output, so I can pan left/right audio. If the signal that is coming in is already in stereo format (i.e., it already has two channels), how can I use the existing PanningSampleProvider to perform the balance between the left and right channels?
Paul
Paul
↧
New Post: If signal is already stereo, how do I pan left/right?
PanningSampleProvider expects a mono input. When you have a stereo signal, panning gets complicated. Does it just adjust the volumes in the left & right channels (a balance control), or can it actually move some signal from the right channel to the left? You'd be best off writing your own stereo panning/balance/width provider that works how you want
↧
↧
New Post: Code example of using FFT on a live audio stream
Does anyone have any example code of how to use an FFT on a live audio stream. I know I need to put the code into "frames" but don't know how to go about doing that. A simple example would help a lot.
↧
New Post: Network Chat Multi-Client Program
Are there any samples from the naudio demos that deal with adding intermediate streams? I'm confused how adding another stream would work if I've already added a client's waveprovider to the MixingSampleProvider.
↧
New Post: How to create multi-channel (5.1) wma with NAudio in c#
I have a C# project that can create 6 mono wav files. How to import these 6 mono wav files to create a multi-channel (5.1) WMA audio with NAudio?
Many thanks in advance.
Many thanks in advance.
↧
New Post: How to create multi-channel (5.1) wma with NAudio in c#
MultiplexingWaveProvider can join them all together into a single 6 channel file. Then you'd need to pass that into the WMA Encoder. I've never done 5.1 encoding though, so I have no idea whether other challenges await you after that.
↧
↧
Source code checked in, #b67d20a2915e
support for focusrite Scarlett 2i4, which has a problem calling ASIOgetLatencies function
↧
New Post: Sample Aggregation For WASAPI Loopback
That's ok, just double checking!
I have tried to implement the event driven mode into WASAPI Capture (plus loopback), see my franken-code below. But for some reason WaitHandle.WaitAny under the DoRecording method never receives a response and always times-out (no matter how big the time-out is).
Any idea why AudioClient isn't responding with events?
https://dl.dropbox.com/u/14822/WASAPI/WasapiCaptureForFile.cs
https://dl.dropbox.com/u/14822/WASAPI/WasapiLoopbackCaptureForFile.cs
Kind regards,
Ollie
I have tried to implement the event driven mode into WASAPI Capture (plus loopback), see my franken-code below. But for some reason WaitHandle.WaitAny under the DoRecording method never receives a response and always times-out (no matter how big the time-out is).
Any idea why AudioClient isn't responding with events?
https://dl.dropbox.com/u/14822/WASAPI/WasapiCaptureForFile.cs
https://dl.dropbox.com/u/14822/WASAPI/WasapiLoopbackCaptureForFile.cs
Kind regards,
Ollie
↧
New Post: Determine which mp3 files are silent with NAudio?
Mark,
Thanks for the reply. I wanted to write my understanding of what you've written and if you don't mind correcting me if I misunderstand, I'd appreciate it.
So, calling AudioFileReader.Read() fills in a byte array and then I can take that buffer, loop through some of the buffer and construct some floats out of the bytes and then compare those floats against the threshold value. Audio that is truly silent - where nothing was recorded for, say, 1 minute will have values that are 0.0F. Any audio that has just ambient background noise but nobody talking or no music would have a fairly low value (close to 0.0 but greater than it).
Thanks for you time!
Matt
Thanks for the reply. I wanted to write my understanding of what you've written and if you don't mind correcting me if I misunderstand, I'd appreciate it.
So, calling AudioFileReader.Read() fills in a byte array and then I can take that buffer, loop through some of the buffer and construct some floats out of the bytes and then compare those floats against the threshold value. Audio that is truly silent - where nothing was recorded for, say, 1 minute will have values that are 0.0F. Any audio that has just ambient background noise but nobody talking or no music would have a fairly low value (close to 0.0 but greater than it).
Thanks for you time!
Matt
↧
New Post: Play same file multiple times using WaveOutEvent
I will try the suggested fix but could you please help me to clear my previous doubt (last para in my previous post).
↧
↧
New Post: Play same file multiple times using WaveOutEvent
I tried the suggested fix, its working fine but we will force callbackEvent to go in signaled state each time when a new PlaybackThread is started which is not necessary if Stop was called previously (because stop is already calling callbackEvent.Set()).
What if we call it as follows:
What if we call it as follows:
private void DoPlayback()
{
if (this.buffers == null || this.waveStream == null)
return;
TimeSpan waitTime = TimeSpan.FromSeconds((double)this.buffers[0].BufferSize / (this.waveStream.WaveFormat.AverageBytesPerSecond * 2));
while (playbackState != PlaybackState.Stopped)
{
if (callbackEvent.WaitOne())
{
// requeue any buffers returned to us
if (playbackState == PlaybackState.Playing)
{
int queued = 0;
foreach (var buffer in buffers)
{
if (buffer.InQueue || buffer.OnDone())
{
queued++;
}
}
if (queued == 0)
{
// we got to the end
this.playbackState = PlaybackState.Stopped;
callbackEvent.Set(); <<<<<<< calling Set here
}
}
}
}
}↧
New Post: Determine which mp3 files are silent with NAudio?
AudioFileReader implements ISampleProvider, so you should call the overload of Read that takes a float array and you'll have sample values already. And yes, true silence should be 0.0F for very value (although the encode to MP3 and decode from MP3 might possibly introduce a non-zero value somewhere). The values will be centered around 0.0 - there can be low negative values too
↧
New Post: Sample Aggregation For WASAPI Loopback
I'd check the Initialize parameters are right (there is a 0 that might need a different value)
http://msdn.microsoft.com/en-gb/library/windows/desktop/dd370875%28v=vs.85%29.aspx
there are some code samples here that might be useful:
http://msdn.microsoft.com/en-gb/library/windows/desktop/dd370844%28v=vs.85%29.aspx
Mark
http://msdn.microsoft.com/en-gb/library/windows/desktop/dd370875%28v=vs.85%29.aspx
there are some code samples here that might be useful:
http://msdn.microsoft.com/en-gb/library/windows/desktop/dd370844%28v=vs.85%29.aspx
Mark
↧