🚀 go-pugleaf

Thank you for your advice, but it seems slightly radical to go cutting
away at cables. Anyway, I've been able to confirm that it is an
earth-loop, 'cos when I have the HiFi plugged to my G3 and then I unplug
the monitor and computer the hum disappears. I felt awfully tempted to
cutting the earth wire. I've now got a solution, wich isn't really one
because the hum is still there: I turned the sound in the controlpanels
to maximum and turned down the volume on my hifi.
I'm still wondering whether a coaxial-cinch cable would help.
Any suggestions?