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Re: [all] stereo to mono phase problems
Wow, Excellent Lindsay. Thank you.
I will do some thorough testing now with this info. It's a very helpful at
approach to use to resolve the muddy mono monitor sound problem (thought it
doesn't affect recording or headphones).
I am using phono to RCA adapters on the control room outs which are plugged
into the TRS balanced phono outs. Aha? could be poorly wired +/- adapters.
In considering the best cable for main outs or control outs, I wonder what
type of cables to use if cabling from the balanced TRS phono outs to a
non-balanced input such as a tape deck.
non balanced cables or TRS phono balanced to non-balanced?
----- Original Message -----
Sent: Monday, November 06, 2000 12:25 PM
Subject: OT: [all] stereo to mono phase problems
> Source material:
> Multitrack channels: mono
> CD player: stereo
> DJ-600 mixer: stereo
> (mixing stereo sources?)
> Mic: mono
> The above are not likely to come from the source out-of-phase. Next
> investigate individual mixer channels.
> Alesis Studio 32: phase invert not available (at least I can't find it
> listed in Alesis' on-line documentation). So rule that out.
> Next: cabling from mixer to amp. Main outs are 1/4" TRS (balanced or
> unbalanced). If I remember right, the phase-inverted signal of a
> output is on the ring part of the TRS cable. I doubt that your mixer's
> wiring could be that screwed up to have the tip and ring switched on one
> output. However, there is the slightest possibility, so try avoiding the
> main outs from your mixer--you've got control room outs as well as group
> and aux outs; mix down to a pair of those and see if you still have the
> "muddy" problem. If so, then there's your problem--the main outs. If
> I doubt the problem is in the cabling itself--if it was a cabling problem
> (as in faulty cable), then you'd have the same problem all the time, not
> just when panned to center.
> The amp? Man, I can't think that the amp is the problem. But, as a
> get some 1/4" to RCA cables and run them from your mixer's main outs and
> your home stereo's tape or CD in. Listen to your mix through your
> Does the problem persist? Actually, this test would rule out everything
> downstream of your mixer: the cables, the amp, the speaker wire and the
> monitors. Try this out.
> If the above test fails to reproduce the problem, then it has to be
> downstream of the mixer. Check the polarity of all your wiring. Make
> it's consistent for both sides. Actually, you've probably done this
> already a thousand times. So, confident that the wiring to and from the
> amp is correct--and that the problem still persists--switch the polarity
> the leads coming into only one speaker. We're now deliberately out of
> phase with the other speaker. Still have the problem? At this point, I
> doubt phase is the issue. Move your speakers to a new position. Maybe
> just have one wickedly bad sounding room (though this should be evident
> the stereo mixes, too). I can't think of anything else, and I've already
> been long-winded enough.
> "Paul Buelow"
> <email@example.com To:
> om> cc:
> Subject: Re: [all] stereo to
> 11/06/00 problems
> 01:51 PM
> respond to
> > what is the nature of the source program material?
> I've experienced the phase problem with a variety of sources and isolated
> to a problem between the mixer and the amp + speakers. The mixer is an
> Alesis32. Monitoring through the mixers headphone output does not exhibit
> the same muddy result when panning to center.
> I have ruled out the source as the problem. The source is fine when
> directly to the amp (hence no panning to center). Is panning to center
> inherently going ot cause a phase problem. Could it be the room or
> position causing a problem? The source is either mono tracks from a
> multitrack deck, CDs, DJ-600 mixer output or mic input.
> It appears to be a problem with the relationship between my cabling
> monitor wiring.