Computer Oscilloscope Problems

[cariboo1946]

I've downloaded two computer oscilloscopes, so that I could measure the
frequency of a two tone audio signal I have on a cd. Both of these computer
oscilloscopes use the sound card for input, yet no matter how much I try to
get them to measure the signal, all I get is a flat line, no measureable
wave at all.

The one is Oscilloscope 2.51, the other is the BIB Lab Oscilloscope 3.0. Is
anybody familiar with these two programs, and can give advice on how to set
them?

Thanking you in advance...........DF

 

[Charles Schuler]

I've downloaded two computer oscilloscopes, so that I could measure the
frequency of a two tone audio signal I have on a cd. Both of these
computer
oscilloscopes use the sound card for input, yet no matter how much I try
to
get them to measure the signal, all I get is a flat line, no measureable
wave at all.

Are they looking for signal input from the microphone jack on the computer?
Have you tried that?

 

[Carl D. Smith]

I've downloaded two computer oscilloscopes, so that I could measure the
frequency of a two tone audio signal I have on a cd. Both of these computer
oscilloscopes use the sound card for input, yet no matter how much I try to
get them to measure the signal, all I get is a flat line, no measureable
wave at all.

The one is Oscilloscope 2.51, the other is the BIB Lab Oscilloscope 3.0. Is
anybody familiar with these two programs, and can give advice on how to set
them?

Thanking you in advance...........DF

You may have to go into your mixer controls and uncheck "mute" on
either the line input or mic input, whichever you are putting the
signal into. Double click the volume control in your taskbar to
get the mixer.

 

[Ben Bradley]

You may have to go into your mixer controls and uncheck "mute" on
either the line input or mic input, whichever you are putting the
signal into. Double click the volume control in your taskbar to
get the mixer.

Looking at the Windows Mixer/Volume Control settings (go to
options->properties, select recording. This may vary depending on
which version of Windows your running) is a good idea, but you may
want to back up a bit.
Since it's already on an audio CD, you can directly copy it to your
hard disk with a CD 'ripper' program. Then you can load the .wav file
into any audio editor program and set it to display FFT to see the
frequencies present at any point in the file/recording.