I was looking at the Airport Express and noted it's audio port is only a 1/8 Mini Audio jack, the same as on a 12" PB correct? Apple says the Airport Express supports Optical audio, which i take to mean surround sound on DVD etc (iTunes 5.1 ?). If I purchase the audio cable (mini 1/8 to TOSLink) will it work with my 12" 1.33 PB? Thanks for any info.