Panasonic BB-HCM331A Operating Instructions Manual page 29

• The external microphone input terminal does not correspond to an line level.
Audio may be distorted when the line level is input. Audio distortion will be
solved if you insert the following circuits. Under no circumstance should high
level audio, such as from a speaker, be connected to this input terminal. Doing
so is likely to damage the camera.
Camera
External Microphone
Input Terminal
Resister
33 K
[For assistance, please call: 1-800-272-7033]
Operating Instructions
Capacitor
Audio Line
Out
1 F
29