Mixer question

[Ian Fritz]

Mitchell --

I have a Mackie also (1202-VLZ) and I don't see this behavior. According to
the manual, with the trim control all the way down a 10 dBV signal should
read 0 on the VU meter. With a +/- 5 V tri wave I get 0 VU, which agrees OK
(a +/- 5 V sin wave would be 11 dBV). With a +/- 10 V signal you should only
read about 3 dB on the VU meter, which is within the range suggested by the
manual (0 to 7 dB).

The only possible explanations I can think of are 1) you have a different
model with a different input attenuator, 2) you have some feedback loop or
3) there is some grounding problem.

  Ian

----- Original Message -----
From: "Mitchell Hudson" <mitch at sirius.com>
To: "Synth DIY" <synth-diy at node12b53.a2000.nl>
Sent: Friday, January 05, 2001 3:30 PM
Subject: Mixer question


>     I got a mixer a, it's a mackie, a little while and back and am still
> figuring it out. I just realized there is a little switch that shows the
> input level versus the output. After playing with this for a little bit
> I find that even with the trim turned all the way down my input levels
> are in the red. I am routing the the audio out of any patch that I setup
> directly to the mixer. Is this bad? Should I be attenuating the signal
> before I get the mixer? Can this damage my mixer? Or am I just paranoid?
>
>     My synth is a collection of TomG, Blacet, Paia and few home brew
> modules. I guess the output should be in the range of -10 to 10v.
>
> --M
>
>