I'm perplexed about this buzzing problem. Did you use
the same power supply with both DL4's? It sounds like you've tried just
about everything else. The only other thing that I can
think of, is that maybe you've got a feedback loop going somehow - that will
cause a high-pitched tone, although it doesn't seem a likely culprit.
If you have a barrel connector, try connecting the send straight back to the
return, and see what happens.
Regarding overloading your EDP: I used to have that problem a
lot, especially with low-frequency signals. Then I realized that the EDP
simply doesn't have as much headroom as the Mackie, so I did two things:
(1). I turned all of my levels down, so that I was no longer peaking out at
+10dB, but rather at unity if possible. (2) I turned the EDP's input
down a little and then boosted its return channel into the Mackie a
little bit to compensate. This won't do wonders for your signal-to-noise
ratio, but neither will clipping.
When the red light goes on, things do tend to get ugly.
You can hit UNDO as soon as you get distortion to keep the crunch from looping,
and then back off the feedback a little bit to let the levels settle
down to a manageable level. With your tuba, I'm sure that you must get big
pileups of waveforms, which are maxing out the looped signal. I believe
that the EDP software automatically cuts the looped signal somewhat whenever you
overdub, but it may not be enough when we're talking about Big Bass Waves.
You may need to keep the feedback rolled off a hare to keep things under
control when you're overdubbing a lot of low notes. If you're using a
MIDI pedal to control the EDP, you could theoretically assign two pedals to
the overdub function: one regular for higher notes, and a second one
that lowers the feedback while it's pressed down for the brown-tone
----- Original Message -----
Sent: Thursday, March 21, 2002 5:22
Subject: Re: DL4 problem
At 11:25 AM 3/21/02, you wrote:
Here's some stupid
suggestions 'cause you've probably already thought of
Don't count on it, I'm just a dumb
What happens when you try a
different Mackie channel?
Same thing, and I'm back to that
weird (split, actually) tone - even on the new 1202 VLZ PRO I just came back
from the store with...at least with the Hosa insert (send/return cables ARE
synonymous with insert cables, right?) cable. Funny thing, I don't get
that tone with the Monster version (I'm probably repeating myself here), but
no sound or levels to other effects running through sends &
Before leaving for the store, I suddenly was able to loop with
either of the two DL4s, no buzz/tone - sound of the loops were very faint
though. I decided it must be the mixer.
What happens when you patch the
DL-4 into/out-of aux or effect send/returns
instead of using the
I think I tried this yesterday, but let's give it a
go...same thing - it's a perfect fifth, E-B.
What happens when you substitute
another unit (non DL-4) for the DL-4? (You
could even use a plain
None of the other units cause this to happen
I suspect a fault in the mixer
since you've changed everything else.
So did I until I brought
this new one home...and apart from being completely un-adept at the EDP, I
thought (a week ago) that this was a positive occurrence, so as to wean me
from my 'training wheels' (the DL4), but when I've been able to loop to any
degree whatsoever with the EDP, I invariably hit a point where - THWACK!! -
EVERYthing is in the red.
Any other takers?
From: Tom Heasley
Sent: Thursday, March 21, 2002 2:09
Subject: DL4 problem
Maybe someone has an idea about
this...I've had the DL4 running problem-free
for going on two years
now. Always connected the same way - Hosa insert
patch cable (1)
connected from the L input/L output to the channel 1 (same
channel as my
clip-on mic) insert on my Mackie 1202. Recently, I was
tone (registering as a high D# on my tuner) generated thru the
which I was able to trace to the DL4. I put in an different
cable and the sound got slightly louder. I have a performance
so I went and bought another DL4, adapter and a Monster
patch cable - same
thing, except that now - regardless of which unit or
cable - tone generation
seems to be intermittent (?...), but putting an
insert in the Mackie jack
'deadens' the mixer - no levels on my effects
with it plugged in exactly
where it has always been. Anyone have
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