Tonematch issues with HDMI projector and laptop
Bose L1 with a TS4 ToneMatch attached
I was wanting to use this system at a retirement center for karaoke. I was using a laptop to produce the sound for the video. I ran the sound from the laptop out of the headphone out. I used an 1/8 inch from the laptop to two 1/4 inch that I hooked into Channel 4 an 5 of the ToneMatch. When I ran the sound this way, it sounded great. The moment I hooked in the projector using an HDMI cable there came a very high pitched loud noise. It actually blew the sound card on the laptop, I tried a different laptop, it did the same. I tried various combinations and nothing fixed this. I tried different laptops, I tried different projectors, I tried all different cables, nothing worked, same loud sound. I had disabled the sound going to the HDMI on the computer, and had it only coming from the headphone out and the same problem. I took the system back to where I got it and they could not figure it out. They even switched out a different ToneMatch and still the same high pitched sound. I called Bose and they said I needed to disable the sound going to the HDMI, I told them I had done that and they had no help beyond that. Any suggestions? I need help.