Hi, Yesterday my company was doing sound for a Political Rally in Springfield, Illinois USA and I had an issue that hopefully someone can help me with. The Governor was speaking to a group of 1000 or so people. After we arrived and got our system set up we decided to ask a cameraman to check our signal. This particular cameraman was broadcasting a live audio video feed to all of the Chicago TV/Radio stations. I had setup a matrix out to feed the audio signal for the broadcast. The cameraman said that he was getting a clear, clean signal and it was great. The State of Illinois AV people brought out a gang box to split the audio for the other cameramen in attendance. When it was hooked-up I heard complaints about a swirling sound. We checked the board no problem we plugged our output directly into the original cameraman's camera the noise was not present. So we no that the combination of the board to that box was where the problem was. However when we plugged in a mic directly to the gang box we didn't get swirling sound. Anyone have any ideas. We have 8 more of these booked over the next 6 weeks. I would like to figure out what could be causing the problem. They are paying us $1000 per event and each event is only 3 hours.
The cameraman for Chicago did use the feed directly from the X32 with no problems and many compliments.
(2) wireless mic systems
Lynksys E3000 Wireless Router
(2) Crown XTi 2000 power amps
(2) EV 212T speakers
(2) 75' speaker cables
(1) electrical quadbox
Total time on site from load-in to load-out 3 hours & 15 minutes.