sound card as analog-to-digital converter

[elkimhoc]

sound card as analog to digital converter

Hi all,
I want to use a computer's sound card as analog-to-digital converter, presenting a real-time waveform or spectrum of the signal - which can be music, speech, or output from an electronic circuit.

Did anyone know a good PC program for data acquisition using the sound card? (vb , c++, matlab etc....)

thanks

 

[xulfee]

analog to digital conversion using sound card

for data acquisitioning labview is used

 

[eng_shady00]

sound card analog to digital converter

Hi all,
I want to use a computer's sound card as analog-to-digital converter, presenting a real-time waveform or spectrum of the signal - which can be music, speech, or output from an electronic circuit.

Did anyone know a good PC program for data acquisition using the sound card? (vb , c++, matlab etc....)

thanks

VB can work
but matlab is usualy the best in processing signals
a=wavrecord(N,Fs,Ch)
this comand records and samples the input signal from the mic input as follows:
N: number of samples, it equals s*Fs where s is period of recording in seconds
Fs: sampling frequency
ch: number of input channels< mono or stereo

u can playback the recorded samples as follows:
wavplay(a,Fs)
hope that's useful