Re: 4 ch of audio on Panasonic AG-HPX500P

In Recording Settings you should be able to select any format and frame rate (REC FORMAT). Only in DV do you have the option to select DV, DVCPRO or DVCPRO50. DVCPro HD is also known as DVCPRO100

In any HD format and frame rate, the camera can and will record 4 channels of audio.

Even if your camera is shooting in SD mode, you should be able to select between 2 and 4 channels.

To actually get four independent channels, you have to select the correct inputs and channels.
For 3 lavs, I would choose Lav 1-Rear 1 CH 1, Lav 2-Rear 2 CH 2, Lav 3-Front 1 Ch 3 and On Camera mic-Front 2 Ch 4.

Steve Eisen
Eisen Video Productions
Vice President
Chicago Final Cut Pro Users Group