Chiming in on the 'cheap-usb-audio-interface' conversation

[Ralf Mardorf]

On Sat, 2011-01-08 at 22:28 +0100, Thomas Orgis wrote:
> Am Sat, 8 Jan 2011 14:47:46 -0500
> schrieb Mike Holstein <mikeh789 at gmail.com>: 
> 
> > ground lift added to the plug on the laptop quieted down my firewire
> > interface,
> Still sad that that's necessary, isn't it?

No, ground lift is even used for professional studio equipment, e.g. the
Brauner VM1 power supply. It's not cutting ground, but decoupling it by
a capacitor. At home I added a ground lift to my SPX90II, without a
capacitor, I simply cut ground if needed and I seldom need to use it,
but it can happen that it's needed even in professional studios. This
shouldn't be needed for equipment that durable is installed to studio
racks, but could happen for additional equipment.