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John Doe[_2_] John Doe[_2_] is offline
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Default Digital noise from speakers in flight simulator (X-Plane)

(Scott Dorsey) wrote:

John Doe wrote:

Are you saying that the difference between a "balanced" and an
"unbalanced" connection can be made simply by the cable used?


No. However, if you have a _differential input_ that is intended
for a balanced source, you can use the differential input to break
the signal ground connection effectively and eliminate the ground
loop.


That's next.

In other words... An ordinary stereo output from a PC soundcard
can be balanced by simply using XLR cables?


No, because the output is still not balanced. However, you CAN
still use the differential input to break the ground connection.

There is a discussion of this stuff on the Rane website, also a
very good one in the Yamaha Sound Reinforcement Handbook.

I like balanced.


It's nice, in part because you can break grounds with impunity
then.

A new power supply arrives today or tomorrow. Will see whether it
helps. The idea that increased power draw might cause the problem
is logical.


It's likely to reduce some of the noise, but just fix the damn
ground loop.


I would have immediately fixed the thing (using capacitors on the
input as described by Mike) if it made sense to do that. It makes no
sense to me until I figure out what the problem is and why it is not
commonly discussed on the Internet. There are hundreds of millions
of gamers. They do not fix ground loops with transformers or
capacitors.

Is it something wrong with the JBL LSR305 speakers? Like the inputs
not being compatible enough with the unbalanced output from the
soundcard? Not that I have to know.