Wire colors

[ls2kev]

I cut open a headphone extension cord (1/8" also 3.5mm), expecting to find 3 wires: Bare wire (common) White wire (left audio) Red wire (right audio) Which is what I've always seen when messing with audio wires. Instead, this time, I find Red, Black, and a bare wire... is it safe to assume the black is the left audio? Has anyone come across this?

[Mike02Z]

I would go along with your thinking....The bare MUST be the common so yes, I would assume black is left positive.