You may have to use http://www.scenalyzer.com/main.html to capture both stereo pairs. That allows the second stereo pair to be captured as a WAV file.
Note that on most DV cameras you use one mono mic on the left channel and another mono mic on the right channel of a single stereo pair. For instance one shotgun and one wireless lavalier.
1st, ditto what Harm wrote.
2nd, What camera are you using? While several DV decks have 4 XLR inputs, I don't know of any cameras that do. From what I understand, The cameras that allow Four channel recording only do so in 12bit 32Khz mode, where in standard 2 channel recording 16bit 48Khz should be selected. Many cameras are set to 12bit by default because it allows for in camera audio dubbing channels on 3 or 4 or both.
Thanks Harm and Stephen,
Right now I'm using the Canon HV20, which has a mini plug-in for one mic, but I've been thinking of getting a Beachtek Box to allow 2 XLR mic's, and I will eventually upgrade my camera to one with 2 mic inputs.
I wasn't aware that when there are 2 mic inputs on a camera that the mic inputs are mono.
The Beachtek or Studio1 boxes have 3-pin XLR connections, which makes them suitable for mono mics. Stereo mics typically use 5-pin XLR connectors. I also doubt the HV20 can record two stereo pairs. I'm not 100% sure, only 99.9%.
The specs on the Canon HV20 say DV can do 2 channels in 16 bit mode and 4 channels in 12 bit mode.
But I want to start using HDV, which can only do 2 channels in 16 bit mode. HDV uses MPEG-1 Audio Layer 2, 16 bit, 48 kHz, transfer rate 384 kbps (2 channels).
The DV settings are PCM digital sound with 2 modes: 16 bit, 48 kHz/2 channels and in 12 bit mode is 32 kHz/4 channels.
Is a "stereo pair" 2 channels?
Yes, left and right.