oscillascope help

[paulyt5966]

hi all,i have downloaded a program that turns the pc into a oscillascope turning analogue signals to digital using the pc's soundcard to digitize any input waveform (speech, music, electric signal, etc.)are these programs any good and where could i buy the probes so i could check the outputs of any circuits i build?.thanks.

 

[stevez]

Keep in mind that the frequency range of a sound card is limited and that within that range it may not offer a uniform response across the band. You might want to check your final arrangement against known inputs.

 

[jrz126]

also, aren't there capacitors in there that will block any DC input? So you will only be able to measure AC type signals?