Multiple customer locations have variations of mixing decks and speakers that in turn have variations of output types. i.e. RCA and 1/4 and XLR / any other output a deck might offer.
What I am trying to do is patch the output from any one of these sources (dependant on what that location has) into a mobile phone 3.5mm jack so that I can make a call and have the output from the source act as the microphone-in - effectively relaying the audio from the source to the listener on the other end of the call.
What I have so far:
RCA L+R male to 3.5mm male TRS Mic / Headphone splitter of 2x female 3.5mm to 1x male 3.5mm TRRS 1/8 Stereo male to 3.5mm (TRS?) male adaptor. TRRS to TRS Inverter (ensuring both android and iPhone compatibility)
Could anyone please offer advice on which cables would fulfil my requirement of multiple sources?
Is there anything I need to be aware of on the deck?
Thanks so much!
Edit: Uploaded image: IS there something like this?