[TAG] linking my sound card to xoscpe

[Ben Okopnik]

On Fri, Mar 27, 2009 at 06:11:01PM -0700, Arild Jensen wrote:
> Ben Okopnik recommended a software program called "xoscope" and gave a
> link to a website showing how to build an input circuit  or use a sound
> card.
> I now have the sound card microphone input working and the Xoscope
> display up;  but the sounds from the mike goes to the speakers, not the
> xoscope display.  What do I do to link the two?
> 
> I'm a newcomer to Linux, so please go easy with the jargon. I installed
> UBUNTU only a month ago. I am still learning how to use it. 

Hi, Arild - nice to see you here!

Unfortunately, I can't offer a whole lot of help for this problem: your
problem doesn't have anything to do with Linux, just with the program's
interface. Like every other program in every other operating system,
'xoscope' has its own controls and adjustments - and I'm not all that
familiar with it. There are instructions in its manual page (go to the
terminal and type 'man xoscope'), which also contains a description of
the keys used to control it in the "RUN-TIME KEYBOARD CONTROLS" section.

I found that figuring it out is a lot easier when you have a steady
waveform to read - so I downloaded and ran a program called "siggen"
(written by our own Jim Jackson - it's quite the nifty gadget!) After
that, I started 'xoscope' and presto - I could see the waveform, and
didn't need to click 'Run' or anything else. I did need to adjust the
sensitivity to see more amplitude, but that's just how scopes work.

Oh, and - it's OK for the sound to come out of the speakers. That
doesn't interfere with the operation of 'xoscope' at all.

Good luck!


-- 
* Ben Okopnik * Editor-in-Chief, Linux Gazette * http://LinuxGazette.NET *