bandmor.blogg.se

I'm looking both through "Audio Recorder" and "Soundcard Oscilloscope". So again, my problem is that my computer doesn't see anything when I plug the probe in. It may be noted, however, that my function generator might be producing a really, really crappy signal. I've been trying signals of around 200 mV between 10 Hz and 100 kHz or so. I've hooked the probe up to a sinusoidal test signal and looked at the voltage on the plug's middle section with a real oscilloscope, and it matches pretty closely with what's coming out of the function generator. The wire connected to the section at the very tip, however, doesn't seem to be making a very good connection, so only the middle section actually gives a signal out. It uses a 1/8" stereo plug, with one common- and two signal-sections on the plug. The oscilloscope-probe-to-be is very nearly the same as that described in the link above. "Audio Recorder" shows a constant little green bar, but it is not affected by the signal fed into the probe, or even if the probe is plugged in. I've also tried plugging the probe into the microphone jack on a local Windows desktop computer and making the same changes to "Microphone", but without luck. It only seems to do this when "Microphone" is in use, though - not "Stereo Mix". Sometimes when I plug the jack from the oscilloscope probe in, before I turn the power to the signal on, "Audio Recorder" spikes up with a little green bar for a second, making me think that the things really are configured correctly.

Both devices are set to their "2 Channel, 16 bit, 44100 Hz (CD-Quality)" mode. I think that I've configured "Microphone" and "Stereo Mix" to line-in modes by (1) unchecking their "use this device for playback" box, (2) turning "Microphone Boost" to zero, and (3) deactivating all extra sound effects. It has one audio port with a picture of a pair of speaker-headphones by it.

I'm using an Acer laptop (product ID 00179-60315-00598-AAOEM) running Windows 8.1. I'm attempting to build a soundcard oscilloscope, but my computer doesn't seem to be reading the voltage on the audio jack plugged into it.