The Samson Zoom H2 digital recorder allows 2 channel recording from external sources but uses a consumer 1/8" stereo jack for input. Even though it has those independent channels the standard microphone cabling options only allow for connection of a single device. It makes one envious of those Zoom H4 owners and their two individual input jacks. Fortunately there's a simple non-standard cable option for dual mono channel recording!
![Supposed stereo/mono adaptor](/files/SupposedStereoMonoAdaptor.gif)
Alleged stereo/mono adaptor. Didn't work.
This is purely an electrical problem, we need a cable or adaptor that splits the 1/8" stereo jack's connections into 2 - 1/8" mono jacks. Those of you comfortable with a soldering iron could put together a cable like this in 15 minutes. It's been around 15 years since I've done any component soldering so I opted for a purchased solution.
A stereo to dual-mono adaptor seems like a no-brainer, but be careful. I thought I'd found one fitting the description at a local electronics supply store, but in spite of the correct textual description the adaptor wasn't wired the way I though it was (They really need to include schematic diagrams).
My solution was slightly different. Using a stereo 1/8" plug to dual RCA connector cable as a starting point I knew I had the left and right audio channels properly separated. To complete the cable all I needed was RCA to 1/8" jack adaptors. An additional advantage of this cable over an adaptor plug is the cable doesn't stick out as far from the side.
![Zoom H2 with dual mono cable](/files/ZoomH2WithDualMonoCable.gif)
This cable is field tested and works like a charm with my Zoom H2. I've recorded "two microphone" interviews with great results.