Topic: 1/8" Stereo to Bal XLR????

[anodyne33]

Hoping there's an interconnect genius that can set me right on this one. I need to go from an 1/8" headphone output (on a laptop) to an XLR input for a courtroom soundsystem. I'd like to preserve both channels of audio to the mono XLR input. My initial thinking is;
Pin2 = T & R
Pin3 = S
Pin1 - float

Will I have any summing issues by connecting T & R (left & right) together? Will it be a problem to float Pin1?

I'm probably going to eng up hacking into a cable and figuring it out for myself, but I'd like to have a good starting point. This HAS to be WAY more simple than I'm making it... either that or damn near impossible!

Thanks

[heath]

tie low to ground.