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MD Noise Investigation

MD Noise Investigation

2002-02-06 by Julian Parker

After all this talk of funny noises coming from the MD I decided to see if I
could hear what everyone means. I'm sad to say that I can too here these
'decay' noises. I did a bit of testing and noticed the following things:-

-The noises seems to be dependent on pairs of outputs i.e. a sound on the
main outs triggers the noise in the main outs(A + B) whereas a sound on out
C triggers the noise on C + D and a sound on E triggers the noise of E + F.

-The noise does not seem to pass between pairs of out i.e. a sound on out E
does NOT trigger the noise on out A,B,C or D.

-The noise bears some resemblance to the sound that has been triggered. This
is especially obvious with sound that have more high frequency content eg
snares. This indicates to me that the problem could be some kind of signal
bleed through.

-The volume and erm.. (hard to describe) shape of the noise is effected by
the volume of the sound that has been triggered.

-There are other small, seemingly unrelated, periodic noises present on the
outputs.

All of this seems to point to a hardware rather than software problem to me.
Bear in mind that I am just a student and my opinion probably counts for
nothing and may well be wrong. Would anyone with a better technical
background (Shifty where are you!), like to lend their opinion? You can
quite easily reproduce the noise by, for example, assigning a bass drum to
out C and then listening with the volume up on out D.

over and out

jng[png]

re: MD Noise Investigation

2002-02-06 by Julian Parker

----------
Show quoted textHide quoted text
From: Julian Parker <chiba_city@...>
Date: Wed, 06 Feb 2002 22:19:24 +0000
To: Julian Parker <chiba_city@...>
Subject: Re: MD Noise Investigation

on 2/6/02 10:16 PM, Julian Parker at chiba_city@... wrote:

> After all this talk of funny noises coming from the MD I decided to see if I
> could hear what everyone means. I'm sad to say that I can too here these
> 'decay' noises. I did a bit of testing and noticed the following things:-
> 
> -The noises seems to be dependent on pairs of outputs i.e. a sound on the main
> outs triggers the noise in the main outs(A + B) whereas a sound on out C
> triggers the noise on C + D and a sound on E triggers the noise of E + F.
> 
> -The noise does not seem to pass between pairs of out i.e. a sound on out E
> does NOT trigger the noise on out A,B,C or D.
> 
> -The noise bears some resemblance to the sound that has been triggered. This
> is especially obvious with sound that have more high frequency content eg
> snares. This indicates to me that the problem could be some kind of signal
> bleed through.
> 
> -The volume and erm.. (hard to describe) shape of the noise is effected by the
> volume of the sound that has been triggered.
> 
> -There are other small, seemingly unrelated, periodic noises present on the
> outputs.
> 
> All of this seems to point to a hardware rather than software problem to me.
> Bear in mind that I am just a student and my opinion probably counts for
> nothing and may well be wrong. Would anyone with a better technical background
> (Shifty where are you!), like to lend their opinion? You can quite easily
> reproduce the noise by, for example, assigning a bass drum to out C and then
> listening with the volume up on out D.
> 
> over and out
> 
> jng[png]



P.S. despite these minor problems the MD is still a rather lovely little
bugger of a machine. And lets be honest, this noise is nothing like the
Sidstation level of noise. I like Elektron noise! it adds a nice background
to my tracks ;-)

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