Why is there no support for SetVolume, SetPan,...
I tried to implement that but I get E_NOINTERFACE HRESULT. So I tried to implement the IUnknown Interface but it does not work. Do you have any ideas?
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New Post: DirectSoundOut support for SetVolume and so on?
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New Post: Mixdown multiple WAVs to a single file
Hi,
similar to this(http://naudio.codeplex.com/discussions/356641) problem, I'm looking for a clever solution to mixdown n files (mono) to a single file (stereo or mono doesn't matter).
I run into WaveMixerStream32 but I don't know how to handle it correctly.
Also I'm looking for a way to amplify/normalize the mixdown. Do some of you have any ideas how to do that in NAudio?
Thanks!
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New Post: ASIO input
Hi Hfuy,
Thank you for the posting, is there any easy way to convert that InBuf to .wav file. If I have given the filename the inBuf should be saved to the filename.wav file. Please help me in this regard. Any sample code would be helpful.
Thanks in advance.
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New Post: ASIO input
Sorry, I can't really help you - I used the data in other parts of my software, and never needed to send it to a file. Presumably there is a way to do this in naudio; I found a few promising hits with a simple google search:
http://www.google.co.uk/#hl=en&sa=X&ei=eh38T_eHJYWL8gOqlcmRBw&ved=0CEIQvwUoAQ&q=naudio+save+wav+file&spell=1&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=42bc37e02999c64c&biw=960&bih=569
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New Post: Fade revisted
Hello all,
I was recently looking at a piece of code Mark posted on stackoverflow regarding fade in/fade out.
The directions are, "Just call BeginFadeIn or BeginFadeOut with the appropriate fade duration."
So I tried to implement it like this:
// fade it out over 2 seconds
var afr = new AudioFileReader(filename);
var fader = new FadeInOutSampleProvider(afr);
fader.BeginFadeOut(2000);
But I am not exactly sure what to do next, because there is more to it than this. I am not sure what to do with the Read function. My goal is to be able to pass in a file that has a static volume throughout, and get a new file that fades to zero over the last 2 seconds of the file.
Any pointers would be appreciated.
//class
public class FadeInOutSampleProvider : ISampleProvider { enum FadeState { Silence, FadingIn, FullVolume, FadingOut, } private readonly object lockObject = new object(); private readonly ISampleProvider source; private int fadeSamplePosition; private int fadeSampleCount; private FadeState fadeState; public FadeInOutSampleProvider(ISampleProvider source) { this.source = source; this.fadeState = FadeState.FullVolume; } public void BeginFadeIn(double fadeDurationInMilliseconds) { lock (lockObject) { fadeSamplePosition = 0; fadeSampleCount = (int)((fadeDurationInMilliseconds * source.WaveFormat.SampleRate) / 1000); fadeState = FadeState.FadingIn; } } public void BeginFadeOut(double fadeDurationInMilliseconds) { lock (lockObject) { fadeSamplePosition = 0; fadeSampleCount = (int)((fadeDurationInMilliseconds * source.WaveFormat.SampleRate) / 1000); fadeState = FadeState.FadingOut; } } public int Read(float[] buffer, int offset, int count) { int sourceSamplesRead = source.Read(buffer, offset, count); lock (lockObject) { if (fadeState == FadeState.FadingIn) { FadeIn(buffer, offset, sourceSamplesRead); } else if (fadeState == FadeState.FadingOut) { FadeOut(buffer, offset, sourceSamplesRead); } else if (fadeState == FadeState.Silence) { ClearBuffer(buffer, offset, count); } } return sourceSamplesRead; } private static void ClearBuffer(float[] buffer, int offset, int count) { for (int n = 0; n < count; n++) { buffer[n + offset] = 0; } } private void FadeOut(float[] buffer, int offset, int sourceSamplesRead) { int sample = 0; while (sample < sourceSamplesRead) { float multiplier = 1.0f - (fadeSamplePosition / (float)fadeSampleCount); for (int ch = 0; ch < source.WaveFormat.Channels; ch++) { buffer[offset + sample++] *= multiplier; } fadeSamplePosition++; if (fadeSamplePosition > fadeSampleCount) { fadeState = FadeState.Silence; // clear out the end ClearBuffer(buffer, sample + offset, sourceSamplesRead - sample); break; } } } private void FadeIn(float[] buffer, int offset, int sourceSamplesRead) { int sample = 0; while (sample < sourceSamplesRead) { float multiplier = (fadeSamplePosition / (float)fadeSampleCount); for (int ch = 0; ch < source.WaveFormat.Channels; ch++) { buffer[offset + sample++] *= multiplier; } fadeSamplePosition++; if (fadeSamplePosition > fadeSampleCount) { fadeState = FadeState.FullVolume; // no need to multiply any more break; } } } public WaveFormat WaveFormat { get { return source.WaveFormat; } } }
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New Post: Fade revisted
I figured it out almost immediately after posting:
var afr = new AudioFileReader(filename); var fader = new FadeInOutSampleProvider(afr); fader.BeginFadeOut(2000); var stwp = new NAudio.Wave.SampleProviders.SampleToWaveProvider(fader); WaveFileWriter.CreateWaveFile("faded"+filename, stwp);
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New Post: Mixdown multiple WAVs to a single file - solved
private WaveFileWriter writer; private List<WaveFileReader> inputs = new List<WaveFileReader>(); ... ... private void button1_Click(object sender, RoutedEventArgs e) { foreach (string s in blah.audiofilenames) inputs.Add(new WaveFileReader(s)); var waveProvider = new MultiplexingWaveProvider(inputs, inputs.Count); writer = new WaveFileWriter(@"D:\temp\mixdown.wav", waveProvider.WaveFormat); int bytesRead = 0; int buffer_size = 4096; while (true) { byte[] bytes = new byte[buffer_size]; try { bytesRead = waveProvider.Read(bytes, 0, buffer_size); } catch (Exception ec) { // throw ec; } if (bytesRead == 0) { Console.WriteLine("end"); if (writer != null) { writer.Flush(); writer.Close(); writer.Dispose(); } break; } writer.Write(bytes, 0, buffer_size); } }
This is the code that solved my first problem. It is generating a multitrack wave file (8+ tracks in one file in my case). Of course you could put this in its own thread.
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Created Issue: MP3FileReader.Length property is not correct [16359]
I use the MP3FileReader to open a mp3 which is in the attachments , the total time returned is 05:09. And I use the NAudio demo to play this mp3, the sound is slower than expected.
But if I use other players like foobar to open this mp3, the total time is 03:41, and sounds normal.
I think there should be a bug in this class.
But if I use other players like foobar to open this mp3, the total time is 03:41, and sounds normal.
I think there should be a bug in this class.
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New Post: Why FastFourierTransform.FFT() Is So Sloppy?
Did I use the FFT in the right way? But it was so slow that all the GUI stucked
half way. Nota that I put DoFFT() in the wi_DataAvailable() handler. And actually,
I only had 64 samples for FFT, but it was really slow.
I wonder if there is someone kind enough to provide me some usage tips and examples.
void DoFFT(Int32[] samples) { fft = new List<Complex>(); for (int i = 0; i < samples.Length; ++i ) { Complex c = new Complex(); c.X = sample_lst[i]; c.Y = 0; fft.Add(c); } AdjustFFT(); ffts = fft.ToArray(); FastFourierTransform.FFT(true, ffts.Length, ffts); } // Make FFT have power-of-2 elements.
// And apply windowing to samples
void AdjustFFT() { int i = 0; double c = 1; for (; c < fft.Count; ++i) { c = Math.Pow(2.0,i*1.0); } int d = (int)c; for (int k = fft.Count; k < d; ++k) { Complex p = new Complex(); p.X = 0; p.Y = 0; fft.Add(p); } for (int v = 0; v < fft.Count; ++v) { Complex g = new Complex(); g.X = (float)(fft[v].X * FastFourierTransform.HannWindow(v, fft.Count)); g.Y = (float)fft[v].Y; fft[v] = g; } }
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New Post: Why FastFourierTransform.FFT() Is So Sloppy?
for an explanation of FFT with NAudio please see this article
http://channel9.msdn.com/coding4fun/articles/AutotuneNET
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New Post: exception {"NoDriver calling midiOutShortMsg"}
Hello, I discover a problem today, I sending midi trough MIDI loopbe1 free apzz, a virtual wire. Have this error:
NAudio.MmException was unhandled
HResult=-2146233088
Message=NoDriver calling midiOutShortMsg
Source=NAudio
StackTrace:
at NAudio.MmException.Try(MmResult result, String function)
at NAudio.Midi.MidiOut.Send(Int32 message)
This happen only when I run my code, and then lock windows , after unlock MS windows when send MIDI NOTES, this error happen, but no if send CC, only with MIDI NOTES, I repeat not when send midi CC.
Hoppe can help to me Mark, 100% stuck on this, if window sis locked when my software is running then when unlock the software cash due that NAudio.MmException.
midiOut.Send(
MidiMessage.StartNote(1, 127, 1).RawData);Why this happen after lock windows and unlock windows?
Some idea?
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New Post: Play and Record simultaneously problem
You ought to be able to play and record at the same time unless you are using a soundcard that doesn't support it (which is very rare but I have heard of hem). What driver callback mode are you using?
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New Post: DirectSoundOut support for SetVolume and so on?
DirectSound was contributed to NAudio by someone else, and possibly they did not implement all the features.
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New Post: waveIn_DataAvailable handler is not triggered from windows service or console application !
you can either build the code yourself, or use Nuget to pick up a pre-release build
http://nuget.org/packages/naudio
Mark
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New Post: exception {"NoDriver calling midiOutShortMsg"}
Yes, is very clear is related to driver, I try closing and open again if system is locked, but have to surf deep on the windows api for detect when that happen.
Thank you!
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New Post: how to amplify grabbed recorded voice bytes from microphone?
hi,
I am grabbing voice from microphone using waveInEvent _DataAvailable. As the microphone is not high sensitivity (can't record voice from long distance), I'd like to amplify each grabbed byte in waveInEvent _DataAvailable, so the sound is going to be increased double to triple times,
so how can I do that using NAudio?
thanks
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New Post: how to amplify grabbed recorded voice bytes from microphone?
check out the calculator on this page
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New Post: Probably Simple
Hello,
I sucessfully am playing the same wav file over two sound cards. This is not the issue however as the same problem ocurrs with a single sound card.
I am playing back a wav file. When I close the program, an error message is thrown that says the WavOut device was not closed. Also, the file crackles after it finished playing.
There probably is a method lurking around in NAudio that I am not calling. I have a feeling I need to dispose of the WaveOut object after the files are done. I called the dispose method, but the program does not wait for the wav file finished playing.
How do you rectify this situation?
Thanks,
Ben (kingneb)
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New Post: Audio Format Conversion
Is this possible to convert Existing Audio of type Mp3 to Wav , and Wma to Wav Format
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New Post: Play and Record simultaneously problem
markheath wrote:
You ought to be able to play and record at the same time unless you are using a soundcard that doesn't support it (which is very rare but I have heard of hem). What driver callback mode are you using?
Thank you for answering.
Meanwhile I solved the problem (but I have to study if I'm using best solution).
It seems there were some threading relative problems:
1- gui freezed just trying to acquire signal inside the main (gui) thread;
2- it isn't possible to acquire a signal in a separate thread just using default "new WaveIn()"
To solve 1. Now I'm using a thread for output and a thread for input (both started by gui thread).
To solve 2. To be able to acquire signal I used workaround described here: http://naudio.codeplex.com/workitem/16131
while (isRecording) {
Thread.Sleep(100);
System.Windows.Forms.Application.DoEvents();
}
When naudio next version is released, I'll try to use directly WaveInEvent.
PS: I'm using a PCM2902 based chip (I assembled) to work.
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