Bc2000 (for the BCF2000 & BCR2000)

Hi Steve
> When I move any endless encoder (havent noticed it on buttons) I can
hear, thru my audio mixer, constant clicks.
> I notice this isnt on all channels (only selected).

I assume you mean mixer channels .

> I thought MIDI cables themselves are current loops with opto-couplers
to prevent earth loops etc.
They are and as they are fairly slow baud rate it should be noise free.

> And yet this BCR movement is creating audio in certain channels of the
mixer.

What is connected to the audio input of these channels?
Many synths will give a 'zipper' noise with sysex parameter change
(rarely CC messages)
What synths are you using?
Is the gain set high on these mixer channels?

> 1] Anyone else ever experienced this from BCR2000
No

High frequency noise is usually related cpu clock noise.
50Hz (or 60Hz) rumble is of course mains.

Clicks in the encoder  would mean that the BC was broadcasting  either
contact noise from the encoder or CPU reaction -> Midi  output.
Contact noise from such a low voltage low current device seems unlikely.
As I recall the Midi output feeds have ferrite cores on them as well.

Disconnect every input from the mixer.
Route all mixer inputs to the output,  faders up.
Still there on any channel? -- check the gain on those channels.

Connect each synth one at a time - any noise?
If there is,  record some BC Midi messages in a DAW, disconnect the BC
and play the DAW track back and output that to the synth instead.
Still noise then it is the synth?

Royce