asked on

Playing Microphone Input.

I'm looking for code to read in the audio input from the Microphone and play it out again throught the soundcard.

I believe it can be done using the waveIn* and waveOut* api calls but I cant suss out the buffer stuff.

Thanks in advance
Gordon

Wyn

Hi,Gordon .There are many ways to record input from soundcard.

Qed:
1. MCIWnd Window Class

Recording with MCIWnd Controls
http://msdn.microsoft.com/library/psdk/multimed/mciwnd_0e43.htm

2. MCI

Recording with a Waveform-Audio Device
http://msdn.microsoft.com/library/psdk/multimed/mci_4wpx.htm

3. Waveform Audio

Example of Writing Waveform Data
http://msdn.microsoft.com/library/psdk/multimed/wave_8rj5.htm

Recording and Playing Waveform Audio
http://msdn.microsoft.com/library/techart/msdn_spellit.htm

4. DirectSound

Tutorial 2: Capturing a Sound
http://msdn.microsoft.com/library/psdk/directx/dstut_9ox0.htm

Regards

Wyn

And here are some info you need:

some samples:
Audio Mixer Functions Demo
http://www.codeguru.com/multimedia/ADMixer.shtml

http://msdn.microsoft.com/workshop/c-frame.htm?944437056110#/workshop/imedia/windowsmedia/sdk/wmsdk_fmt.asp

And if you want to use waveinxxx waveoutxx .I can write another sample but it will take some time.First check above info.

Regards
W.Yinan

Gordonp

ASKER

Wyn>
All bar one of your links are for recording an audio input, and the other link is broken.

I want to play the audio input straight out again on the speakers, not record it into a file.

GordonP

Wyn

I know what you want and Okay now I will write one for you .But I dont think it's big different to above!

Waiting....

Wyn

One Directions:
Use threads for this application. One for receiving and playing the voice you are receiving and another for recording and sending the voice.

One question:
Is your card duplex?

Gordonp

ASKER

> One question:
> Is your card duplex?
Yes!

Wyn

You will find code how to record in above links.Here is how to play them concurrently

The MM_WIM_DATA message will be sent when the input structure are filled.
Then you create a create in handler code:

case MM_WIM_DATA:
_beginthread(doit,0,buffer);
The doit will the function you want to do with the buffer.

Gordonp

ASKER

can I just use one buffer! do I need to use synchro for buffer access??

GordonP

Gordonp

ASKER

the link "Recording and Playing Waveform Audio" doesnt work.

I assume this would have shown me how to read the data into the buffer, do you have a working link for this!!

GordonP

ASKER CERTIFIED SOLUTION

Wyn

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Wyn

->can I just use one buffer! do I need to use synchro for buffer access??
================
All above:)

Gordonp

ASKER

Thanks I'll try it and get back to you

Gordon

Gordonp

ASKER

Thanks for your help

Gordon

gptreven

I have a problem in that I have two sound cards in the one machine and I am having troubles selecting the individual device under waveinopen. It keeps returning error 32 any help