Quote Originally Posted by tracstarr View Post
The gtr20 has dedicated line in on 18,19, 37 for music.
Yes. I guess I worded my question poorly. I used the GTX to GTR20 interconnect drawing. It shows music out form the G3x (pins3 9 20) and music in from 19 18 37. I was wondering what this is for? Read more and found this is if you opt for the xm music. It comes from the G3X. Audio alerts come form mono G3x out to the mono GTR20 in.

So I am going to disconnect pins 3 9 20 and hook those to audio jack that goes into my ipad. Audio alerts will still work over the wire I ran from the G3X pin 1 and 18 to pins 32 31 on the GTR20.