Using an old iMac. The audio out is done by Dragonfly D/A converter from USB port into a Xenyx mixer to headphones. BIB tracks all have this 'swishy' hashy sound superimposed.

But when I connect the same exact set-up directly to my powered studio monitors - no hash. Sounds clean as a whistle.

When i use BIB from my MacBook Pro --> Dragonfly --> same mixer and wires, no digital hash. Clean signal...

I love my 27-inch iMac screen for ease of seeing what I'm doing....but the noise....

Any ideas?

Thanks

Dave


Taylor T5, Epiphone Masterbilt Frontier, iMac, MacBook Pro.