I have a video camera and two lavalier microphones which both come with 3.5mm audio connections. My camera only has one 3.5mm microphone input port. I would like to mix both microphones, which are originally mono, by channeling them into the left and right channels on the camera directly. I do not want to use a mixer, since it is heavy and expensive.
My question: which audio splitter cable do I get to make this happen? Reason I’m asking is most splitters are designed either for dual headphone output or for combined headphone output+microphone input. I need an adapter with two microphone inputs, which takes the left channel from one connection and right channel from another. Does such a thing even exist?