rear view mounted to 5 1/4" bay panel from PC case

100k pot BNC rear and switch

Audio lead to PC line in

Front view - blue input adjustment, red selects x10

Close up of controls

Scope lead connected to BNC

Dual buffer circuit on stripboard

PCB hot glued to PC drive bay panel

For more info and schematic look at:
http://xoscope.sourceforge.net/hardware/hardware.html
Also has the xoscope linux software

Windows PC Scope software link:
http://polly.phys.msu.su/~zeld/oscill.html