I'm using a Behringer Xenyx Q1002USB mixer with various keyboards. I find that one synth - Yamaha MX49 - is causing a lot of noise on the analogue outputs, a kind of swirling sound with mains hum. View attachment MX49 noise.mp3
- It's not there when I monitor the synth directly by plugging headphones into its output - but, crucially, if I connect that same headphone output to the mixer I get the noise again.
- The cables are fine with other gear, the same input channels are also silent with other instruments.