display realtime audio

[bigbattery]

I was hoping someone out there could give me a little help. Trying to develop a virtual oscilloscope using borland visual c++ builder 6. Basically its advice regarding audio card / line in / selection and primary or secondary buffering, then displaying the information in real time using fourier analysis.

It's for a big project, just need a few ideas to get me started. Does anyone know a decent website tutorial or anything? Thanks in advance,
Chris

 

[Cagliostro]

Use COM. Create an instance of windows mediaplayer and play it. More details you may find in OleView(a VisualC++ tool) or VBA object viewer, by using it from any of MSOffice applications (Word, Excel, Access...)

Ion Filipski

 

[markymsofth]

think that theres a directx filter on the dspack website just waiting for you to download.(which will specify all of your requirments)

 

[bigbattery]

Thanks for both of those, but I was looking for something more in the way of a break down. The first thing I'd like to do is to get the name of the available soundcards which are available for input, then select a mixer channel for an available device. It's for an undergraduate projct, so I can't use any external components ideally.

Is the soundcard name an environment variable? If so how is it easily retrieved? I have already written the code enumerating the devices (how many, what their id no's are 1,2,3) but can't find anything sensible about their names anywhere. Hope you can help.

 

[LastCyborg]

What about using DirectX Libraries?

Those libraries use the standars, so it is indifferent the brand or type of your audio card.

DirectX has a special library (DirectSound) which is able to retrieve the information of your SoundCard and by using the TChart classes you have almost what u need.

--- LastCyborg ---

 

[bigbattery]

Great! That's exactly what I want to hear! Where is the library that I need though? I can't find any call in dsound that retrieves directx soundcard capable cards. I'm just glad we're on the directx page guy....

Why is it so difficult to retrieve system component names?!?

 

[LastCyborg]

You need to download the DirectX SDK (for c++ obvious) from Microsoft site. I don't know where excatly the link is. I just bought a book and it contained those libraries. But don't worry they are FREE.

Even in the BCB's smples u can find some examples of using DirectX (I'm not sure but I think that they are just for video) anyway is a way to start in DirectX.

When I get a free time I'm going to check in the book if I can help u.

--- LastCyborg ---

 

[mmmarky]

http://www.progdigy.com

dspack for builder 6 and there is a ver for builder 5 knocking around.

http://www.progdigy.com/download/DSPACK

snapshot.zip for the bcb6 ver

the main link is for the delphi ver i think.

its component set for working with directx9.0c with some examples.