John Ferguson wrote:Dave
If you use a laptop to load and save games etc. does it matter if the ground connections for the microphone and earphone connections on the laptop are joined together?
In all modern equipment, the microphone and earphone connections will use the same internal 0V/ground. The Atom uses the same 0V/ground for everything.
If you are making up your own leads, or are modifying an existing lead, use screened audio cable. The audio out from a laptop will be a two channel "stereo" 3.5mm jack socket. Connect the screen to the (outer) sleeve. This is the 0V/ground connection to the Atom. Connect a single wire to either the tip or the ring terminal (that is one of the stereo channels). Leave the other terminal unconnected. If you label the connector, it helps later on (well, it helps me when I have that oh!, which lead is which? moment...).
For the sound input to the laptop, you need to find out or work out if it uses a two channel/stereo jack socket, or a mono jack socket. If it is a two channel/stereo jack socket, use a two channel/stereo jack plug and wire the signal wire from the Atom to both the tip and the ring. Screen goes to the (outer) sleeve.