Whats the clocks wire involvment?

[spedmetal]

The clock is the frequency with which the chip operates at. On chips like the M2 it pulls the clk off of the PS2's mobo. Other chips have a resonator built into the chip so this wire is not needed. Yes ideally the shorter the clk wire the better, and yes you can get sound problems from the clk wire if its not ran right because the frequency traveling through the wire will bleed into other circuits on the PS2's mobo. You want to run the clk wire away from other wires and on a ground plain if possible.