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New Post: Transefer function

May 24, 2017, 11:48 pm
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So, I tried to do FFT of my wave file and than apply my poly transfer function:

void FftCalculated(object sender, FftEventArgs e)
         {
         //y[n] = A*x^3[n] + B^2[n] + C*x[n] + DI; // my transfer function

            for (int i = 0; i < e.Result.Length; i++)
            {

               fftResultX[i] = e.Result[i].X; // result of fft for Complex.X
               fftResultY[i] = e.Result[i].Y; // result of fft for Complex.Y
               fftResultH[i].X = A * (e.Result[i].X) * (e.Result[i].X) * (e.Result[i].X) + B * (e.Result[i].X) * (e.Result[i].X) + C * (e.Result[i].X)+D; //distortion - fit my fft result to my transfer function
               fftResultH[i].Y = A * (e.Result[i].Y) * (e.Result[i].Y) * (e.Result[i].Y) + B * (e.Result[i].Y) * (e.Result[i].Y) + C * (e.Result[i].Y) + D;
            }
        }
where fftResultH is spectrum with distortion effect of my transfer function. And now I want to playing my effected sound in real time / when I open my wave fine and press my play botton I want to hear effected sound, where I can changing parameters A,B,C,D of my transfer function in realtime... Can I do it this way?
I'm using SampleAggregator.
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New Post: DirectSoundOut isn't fluent stream after passing effect (NAudio, C#)

May 25, 2017, 4:57 am
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OIC!!!.... I don't have to do fft for apply, just what I have to do is from my chart of function se treshold - is first poin for -values and last point for +value of my input and knee of effect and I don't realy understant how i can implement my other nonlinearities - other points in chart... I will think about it...
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New Post: Transefer function

May 25, 2017, 7:41 am
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Girl, you got no idea what you´re doing. Besides that and your load of spelling mistakes, as I said initially it is NOT a trivial task. I don´t even know myself exactly how to do it.
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New Post: How to read MIDI File to text

May 28, 2017, 9:59 am
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Hello,

Im new here... I will do project about statistics in MIDI file. I need to know how many notes are there and how ong thay are etc. etc. Anyway i need to convert MIDI to txt or just to analyze MIDI directly. My question is how can i load MIDI file to my project using NAudio in a way that help me to analyze file..

Thx for any answer and help.
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Created Unassigned: How to integrate StreamMediaFoundationReader into a project? [16516]

May 29, 2017, 6:37 pm
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I want to use the StreamMediaFoundationReader class in my application, to process the signal form the microphone in real time (i.e. without using disk I/O). I tried adding StreamMediaFoundationReader.cs to the project, but it threw a bunch of reference errors when I tried to compile. So, I looked up the required source code, added those files and tried again, and again...

So far, I have added these files to the project, with no end in sight:

AcmInterop.cs
AcmStream.cs
AcmStreamHeaderStatusFlags.cs
AudioCapture.cs
Mp3FrameDecompressor.cs
NAudio.Wave.cs
StreamMediaFoundationReader.cs

Am I doing this the hard way? Can I install a library or do I just have to keep iterating as I've been doing, until there are no more reference issues?

Thanks!
- Al
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New Post: Signal Chain for UDP Audio to local buffer

May 30, 2017, 1:23 pm
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I have a working incoming UDP audio stream being routed to a WaveOut device. I would like
to pass the incoming audio to a buffer instead of the WaveOut device, so that I can pass the buffer to another already coded DSP engine, using pointers to the buffer. The buffer would act as a kind of FIFO. There is a lot to absorb with regards to the available interfaces in NAudio. Anyone have a suggestion what the signal chain items would be for this application. Regards, Karin
PS: Anyone have any idea when this site will be migrated????
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New Post: 64 bit?

May 31, 2017, 12:46 pm
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Hi,

How can I convert NAudio into the 64 bit era?
Is it as simple as making sure the variables are 32 bit compatible?

regards,
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New Post: Transefer function

June 1, 2017, 6:44 am
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No need for FFT right?, Just convolve your signal with the transfer function.
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New Post: Real Madrid Juventus en Streaming Direct

June 3, 2017, 7:00 am
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Commented Unassigned: How to integrate StreamMediaFoundationReader into a project? [16516]

June 3, 2017, 9:18 am
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I want to use the StreamMediaFoundationReader class in my application, to process the signal form the microphone in real time (i.e. without using disk I/O). I tried adding StreamMediaFoundationReader.cs to the project, but it threw a bunch of reference errors when I tried to compile. So, I looked up the required source code, added those files and tried again, and again...

So far, I have added these files to the project, with no end in sight:

AcmInterop.cs
AcmStream.cs
AcmStreamHeaderStatusFlags.cs
AudioCapture.cs
Mp3FrameDecompressor.cs
NAudio.Wave.cs
StreamMediaFoundationReader.cs

Am I doing this the hard way? Can I install a library or do I just have to keep iterating as I've been doing, until there are no more reference issues?

Thanks!
- Al
Comments: Yes, the normal way to use NAudio is to reference the DLL - easiest to just use NuGet, or get the source and build yourself. The StreamMediaFoundationReader class is relatively new and is not supported on all operating systems.
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New Post: Transefer function

June 3, 2017, 11:49 am
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My transfer function is not linear, so you can't convolve nonlinear system with signal. If you want convolve you have to do volterra series. What I have to do is FFT and the add harmonic in spectrum... So... I done it my program can add harmonic distortion to my input signal... but I've got a little trouble with latency. I've go some handling noises like popping in my output signal... but my latency is 250... I think is becouse of counting of polynoms in worker thread...
PS: To Freefall... I'm sorry... I know my English is terrible, but I'm not native speaker and writer definitly not...
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New Post: Transefer function

June 4, 2017, 2:58 am
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Two tips maybe,

1: Add a clipper so the signal does not go to digital 1 and -1. It could be out of bounds rather than latent. But with FFT I can see the point.
2: Lot's of things add harmonic distortion. Think tubes, It's not FFT level complex (nothing is ;) ), rather It's a transfer function.

Good luck!
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New Post: Transefer function

June 4, 2017, 3:34 am
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Thanks but what I need is changing shape of transfer function i real time. Clipper is included in my project...
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Commented Unassigned: How to integrate StreamMediaFoundationReader into a project? [16516]

June 5, 2017, 3:45 am
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I want to use the StreamMediaFoundationReader class in my application, to process the signal form the microphone in real time (i.e. without using disk I/O). I tried adding StreamMediaFoundationReader.cs to the project, but it threw a bunch of reference errors when I tried to compile. So, I looked up the required source code, added those files and tried again, and again...

So far, I have added these files to the project, with no end in sight:

AcmInterop.cs
AcmStream.cs
AcmStreamHeaderStatusFlags.cs
AudioCapture.cs
Mp3FrameDecompressor.cs
NAudio.Wave.cs
StreamMediaFoundationReader.cs

Am I doing this the hard way? Can I install a library or do I just have to keep iterating as I've been doing, until there are no more reference issues?

Thanks!
- Al
Comments: Thank, Mark.
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New Post: Transefer function

June 5, 2017, 5:48 am
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Not shure what the mission was, mbe i'm wrong. But i'd say the pieces are there..
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Commented Unassigned: How to integrate StreamMediaFoundationReader into a project? [16516]

June 5, 2017, 2:47 pm
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I want to use the StreamMediaFoundationReader class in my application, to process the signal form the microphone in real time (i.e. without using disk I/O). I tried adding StreamMediaFoundationReader.cs to the project, but it threw a bunch of reference errors when I tried to compile. So, I looked up the required source code, added those files and tried again, and again...

So far, I have added these files to the project, with no end in sight:

AcmInterop.cs
AcmStream.cs
AcmStreamHeaderStatusFlags.cs
AudioCapture.cs
Mp3FrameDecompressor.cs
NAudio.Wave.cs
StreamMediaFoundationReader.cs

Am I doing this the hard way? Can I install a library or do I just have to keep iterating as I've been doing, until there are no more reference issues?

Thanks!
- Al
Comments: Sorry, still struggling. When I use thee NuGet package, my project build throws a missing reference error for StreamMediaFoundationReader. I have confirmed that 'StreamMediaFoundationReader.cs' is in the compile include list in 'NAudio.csproj', so I don't know what is wrong. Do I need another 'using' statement? (I only have 'using NAudio' and 'using NAudio.Wave')
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New Post: Transefer function

June 5, 2017, 2:51 pm
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What I know so far if I remember correctly:

1) samples of realtime input -> FFT -> Complex output

2) samples of convolution input -> FFT -> Complex output (Can be stored and re-used)

3) Multiply 1) and 2) for convolution -> IFFT (=inverse FFT) -> output realtime samples

I think this was the basic approach.
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New Post: System.IO.Streams via WASAPI

June 15, 2017, 9:48 am
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Hi, i'm facing the same problem, have you find any solution?

Agent_9191 wrote:
I'm working on a project that makes use of System.Speech.Recognition.SpeechRecognitionEngine and System.Speech.Synthesis.SpeechSynthesizer, and want to use NAudio to grab the available microphones and speakers via WASAPI.  I can grab the appropriate MMDevice that I want to use for the speaker or microphone, but the issue I'm running into is retrieving a stream (or piping the data to an appropriate stream) to to pass along to the SpeechRecognitionEngine.SetAudioInputStream() or SpeechSynthesizer.SetOutputToWaveStream().  I've tried a few different approaches but nothing seems to get piped along. Any pointers (or semi-full solution, if somebody's already tackled this...) are greatly appreciated.
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New Post: naudio AudioFileReader not releasing file?

June 16, 2017, 8:44 am
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I should say upfront that I don't expect this is genuinely an naudio problem - but I'm stumped.

My app records the user's voice in discrete phrases, and they can optionally play back their recorded voice, and re-record phrases they are not happy with.

When the app (re)records a phrase, it simply deletes the existing phrase with a call to IO.File.Delete, which normally works fine.

However, if I have played back the phrase first, the call to IO.File.Delete fails with "System.UnauthorizedAccessException: Access to the path <filename> is denied."

Examining with Process Explorer shows, as expected, that only my app has a file handle to the sound file in question.

So, it seems as if the NAudio.Wave.AudioFileReader isn't letting go of the file - even though I explicitly dispose and set the object to nothing when I finish playing the phrase.

Am I missing something? Is there a step I should be taking to explicitly release the file?

Any advice very gratefully received!

Thanks,
Aaron
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New Post: how to input to microphone form wavefile

June 19, 2017, 5:37 pm
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I want to make application that like stereo mixer ,but I don't know how to input to microphone or LineIn from wave file (or buffer from other device)

I was successful that capture PC sounds with LoopBackCapture class.
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