Has anyone had success with this chip?
I'm experiencing really bad crosstalk between the two inputs. input 2 audio coming through to input 1 side.
Can anyone help on this?
The video is perfect... just the audio that's causing a problem!
Grownding or shunting the unused signal is a technique often used for audio and wireless applications.
Some switches implement this shunt internally (ADG918 for example for wireless)
In audio applications, as you have mentioned, its hard to implement it on chip as there are many different impedances used and therefore the on chip shunt would have to be tailored to that line impedance.
The ADG794 is a general purpose switch so it up to you to configure the shunt in a way that suits your system. Unfortunately I can only guess on how you route the signals.
A way to implement what you are describing is to use multiple SPDT switches and use them as a mux with the second pole connected to GND with a 50ohm, 1Kohm or 8ohm resitor whatever works for your system. You may want to consider splitting the video switching and audio switching.
Look also at Audio switches like the ADG884,