Detecting if system i splaying audio
Wed, 30 Apr 2008 01:05:30 -0700
Hi all
I looked around in Windows audio architecture in user and kernel mode and looked for a way to determine if the system at some point is writing to an audio device in order to detect audio being played.
Do you of a way to do it?
thanks,
Tom ...
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Newbie-Question.... Capture microphone input in a stream and get numbers every second or so
Tue, 29 Apr 2008 09:42:01 +0200
How can I:
- capture sound or music from the microphone
- analyze it every little time-span (10th second or so)
- get numbers out of it (volume, frequecy, ...)
I read a lot these days about DirectAudio, Fourier, FFT, SoundCapture,
FIFO....
I downloades samples. I tried things out with C# or VB.NET.
But m ...
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How to capture audio data in a background process?
Mon, 28 Apr 2008 19:07:54 -0700
Hi,
I need to develop a background program that will capture and analyze all
the audio data being played by any application on the PC (independently
of which API the application is using to play the sound). And I need to
do that without changing the settings of the audio mixer or the settings
of these appli ...
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no audio on SPEAKER_LOW_FREQUENCY, else i can use my
device as 4x stereo
Sat, 26 Apr 2008 17:19:46 -0700
// AMMediaType media = ppMediaTypes[0];
AMMediaType media = null;
// if (media.formatPtr != IntPtr.Zero)
// {
// DsUtils.FreeAMMediaType(media);
// media = null;
...
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Building an oscilloscope in managed DirectSound
Sat, 26 Apr 2008 10:16:00 -0700
Hi,
I need to build a simple program showing the waveform generated by the
microphone input.
Is there any sample of this kind making use of managed DirectSound?
VB is my favourite, but C# would also be acceptable. ...
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Splitting 5.1 Device into six mono channels?
Fri, 18 Apr 2008 08:47:02 -0700 (PDT)
I'm working on a project where I need a *lot* of mono audio-outs, more
than one sound card is going to have.
I can use many USB stereo interfaces, each split into two mono
channels by creating two separate devices, one panned right, one
panned left.
I'd prefer to use 1/3rd the USB ports, by splitting a 5.1 ...
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Is there a way to capture voice from output deivce inside a memory buffer or a stream
Sun, 13 Apr 2008 20:42:50 +0200
Hello
first I have to admit I am not too good in directX and sounds matters
but I have a question
I want to capture the voice comes from another computer [i.e while using msn
messenger voice chat or skype] inside a a simple memory buffer or Stream
Is it possible
Thanks in advance
...
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Returning Amplitude (volume) Level From CaptureBuffer
Fri, 11 Apr 2008 15:06:01 -0700
I have searched this forum for Amplitude, Volume, Level and other variations
of the same thing and most return nothing useful. I am still searching the
net for an answer. I have found that if I look at the caputerbuffer that I do
have values ranging from 0 to 255 but that can't be the signal level. Do I
need ...
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MIDI -> MP3
Fri, 11 Apr 2008 14:54:00 -0700
Hi All,
I'm trying to figure out a way to convert MIDI format audio file to MP3
audio. The graph is something like this:
Source (.mid files) -> MIDI Parser -> ... -> LAME Audio Encoder -> File
Writter
What I failed to get is the part of "..." in the above graph...Could someone
give me a hand on this?
...
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Problem about streaming different format audio
Wed, 9 Apr 2008 03:07:01 -0700
This is a problem about the basic principle of audio streaming,not about
DirectShow usage.My program streaming audio data between two cards,but the
format of input card is 44.1k,the output card is 48k,so I use "Audio
Compression Manager" to convert 44.1k audio to 48k(I use acmXXX() API
directly);the capture ...
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