Just tape over pins of a 360 AV cable to make it audio only?

[BitFaced]

Instead of getting a separate audio adapter for the 360 because the sodding thing can't do Toslink audio through a multi-AV cable and HDMI at the same time, I wondered if it'd be feasible to tape/cover over/remove certain pins in the connection of the cable to only let audio through like the adapter. Specifically, I'm using a "AV port to AV port" cable that plugs into a certain switcher, the Joytech Control Center 540C, which has a certain channel for 360 that lets its video outputs serve as the video for the 360.

[Cronozilla]

http://www.instructables.com/id/How-To- ... /?ALLSTEPS

Looks like some people have done some work on this as well.

It'd probably also be possible to take some of the plastic off of the top of an HDMI cable to get them to fit near each other as well.