C++/VB - DirectSound and grabbing samples

Hi,
I'm trying to implement a spectrum of the capturing audio with
DirectSound. I could capture data to a buffer with CaptureBuffer
class. I know fft algorithms and other things to implement a spectrum.
But there is a little problem. How can I grap samples from captured
data in the memory buffer stream? I need an array of the samples from
captured buffer. if I get the array of samples, I can apply my fft
algorithm and generate the spectrum.

I use Managed DirectSound, but an unmanaged code fits me, too. Any
help appreciated.

Regards..

  Shugo_Ishida replied...

Did you check the DirectSoundCapture of the DirectX SDK sample?

(InstallDir)\Samples\C++\DirectSound\CaptureSound

ESP, RecordCapturedData() function in capturesound.cpp:930

understanding is wrong. Regards, Elza Win32 DirectX Video Discussions Vista (1) AecSDKDemo (1) DirectShow (1) DirectSound (1) Boekelheide (1) Providenza (1) Windows (1) Elza (1) You cannot. The AEC DMO cannot be used in a DirectShow graph. It can only be used by itself, or with DirectSound. - - Tim Roberts, timr@probo.com Providenza & Boekelheide, Inc. oh ! I am so sorry, my first I wish to capture echo free audio for my VOIP application. Currently I have a directSound architecture VOIP application. After I read about the 'Voice Capture DMO' and its ability of AEC, I thought I shall move from DirectSound audio capture to DirectShow Audio capture for my VOIP. So as per what Tim has the benefit of AEC DMO? Can you please suggest how complex it will be with directsound? Also is it the Source or Filter mode that I need to start with. Thanks so, as I wrote before, use it directly on its own, outside of DirectShow or DirectSound, or write a custom DirectShow wrapper for it. No idea. It depends on what you riseoftheants dot com / / http: / / www.riseoftheants.com / mmx / faq.htm DMOs can be used with DirectSound. I have never done it, but the documentation mention that use case specifically. - - Tim Roberts, timr@probo.com Providenza & Boekelheide, Inc. From: "Tim Roberts" I believe DirectSound only supports DSP-like DMOs, that is 1 input + 1 output. - - / / Alessandro Angeli / / MVP :: DirectShow

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know which Windows API suits best for this rather simple task. I have read about DirectSound, XACT and XAudio2 so far. The target platform is Windows XP and above. Can someone memory buffer: - waveOut (since Win3.x) http: / / msdn.microsoft.com / en-us / library / dd743678.aspx - DirectSound (since Win95) http: / / msdn.microsoft.com / en-us / library / ee416960.aspx - WASAPI (since Vista) http managing PCM buffer is quite easy). If I were you, I would use waveOut or DirectSound or, if you want a player-like API, DirectShow (but DirectShow can not play PCM Alessandro Angeli" <nob. . .@nowhere.in.the.net> Thanks a lot. I think I will use DirectSound. . . Markus Note that DirectSound is the better API choice for Windows XP, but for Windows Vista and Windows 7 but this is really intended for more sophisticated playback and requires a REDIST using DirectSetup. DirectSound and WSAPI are built into the OS, so there is no REDIST requirement. - - - - -Chuck Walbourn rights. On 23 Mrz., 19:17, "Chuck Walbourn [MSFT]" Ok, so far I have tried DirectSound and XAudio2 and both failed which is not really my fault. I have tried a that they just cannot work and you barely get any information from the crappy MSDN. - DirectSound needs a Window / Form handle for the initialization. If you do not have got such

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