[A6] RE: A6 Digest, Vol 111, Issue 18

[KISSINGER, JEFFREY S]

Hello all,

My name is Jeff and I am new here.   I have a recent problem with my beautiful red A6, the only real problem I have ever had with it.  It boots up and produces no sound.  I have performed soft and hard resets to no avail.  A numark tech it could be the mute transistors have gone out.  Any suggestions or similar things happen to anyone here?

Thx,

Jeff

-----Original Message-----
From: a6-bounces at code404.com [mailto:a6-bounces at code404.com] On Behalf Of a6-request at code404.com
Sent: Sunday, November 21, 2004 3:00 PM
To: a6 at code404.com
Subject: A6 Digest, Vol 111, Issue 18

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Today's Topics:

   1. Re: Why ...No, no Memory! (AnTus)
   2. Some waveform observations (Robert Skerjanc)
   3. Re: Some waveform observations (David Evans)


----------------------------------------------------------------------

Message: 1
Date: Sat, 20 Nov 2004 17:16:16 -0500
From: AnTus <spd2156 at sympatico.ca>
Subject: Re: [A6] Why ...No, no Memory!
To: A6 at code404.com
Message-ID: <419FC230.2000102 at sympatico.ca>
Content-Type: text/plain; charset=us-ascii; format=flowed


Michael E. Caloroso wrote:

The A6 battery is soldered.  Mine went bad and I got it replaced last year.
  MC.
__________________________________________________________________

Hi Michael: I got mine 2 Years ago.
Now could you tell me How long the... $#$%@ Battery lasts?
This is assuming that Newmark/Alesis doesn't have a pile of A-6's in a 
warehouse, waiting to
be sold ...You think?

Also:  If and when the battery expires, a trip to the service Dept.
of my local dealer will be a must rigth?

And now, some A.Ksng:
Thanks Michael for your continuing support to all our little problems.
And : Where can we find your music?

Thanks again
Best always : MG




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Message: 2
Date: Sun, 21 Nov 2004 11:18:07 +0100
From: Robert Skerjanc <mormelq at yahoo.de>
Subject: [A6] Some waveform observations
To: a6 at code404.com
Message-ID: <41A06B5F.1000001 at yahoo.de>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hello all,

I made some strange observations, possibly some of you have an answer to 
that:

1. the basic waveforms of the VCOs look very strange, when you see them 
on an oscilloscope. "Saw" is not a saw wave at all, also the other 
shapes are not mathematically geometrical, but they sound as they 
should. Is this a specialité of the A6?

2. The VCOs have linear and expon. type of FM. Normally the linear type 
is intended for the modulation to stay in tune (negtive slopes detune 
the carrier in same amount as positive slopes), like the DX7. However 
linear FM on A6 stays not in tune. Possibly the reason are the weird 
waveforms mentioned above?

Robert




------------------------------

Message: 3
Date: Sun, 21 Nov 2004 11:21:12 -0500
From: David Evans <dfevans at bbcr.uwaterloo.ca>
Subject: Re: [A6] Some waveform observations
To: Robert Skerjanc <mormelq at yahoo.de>
Cc: a6 at code404.com
Message-ID: <20041121162112.GC12788 at bcr10.uwaterloo.ca>
Content-Type: text/plain; charset=us-ascii

On Sun, Nov 21, 2004 at 11:18:07AM +0100, Robert Skerjanc wrote:
> 
> 1. the basic waveforms of the VCOs look very strange, when you see them 
> on an oscilloscope.

  Many synths have crazy-looking waveforms due to design of the VCOs and
because of other parts of the signal path.  It's part of the source of
fun.

> 2. The VCOs have linear and expon. type of FM. Normally the linear type 
> is intended for the modulation to stay in tune (negtive slopes detune 
> the carrier in same amount as positive slopes), like the DX7. However 
> linear FM on A6 stays not in tune. Possibly the reason are the weird 
> waveforms mentioned above?
> 

  Certainly if they're asymmetrical about the zero axis then that could
happen.  I'm afraid I'm not sufficiently awake to say any more.  ;-)

-- 
David Evans                                         dfevans at bbcr.uwaterloo.ca
Research Associate, Ph.D. Candidate        http://bbcr.uwaterloo.ca/~dfevans/
University of Waterloo         "Default is the value selected by the composer
Ontario, Canada           overridden by your command." - Roland TR-707 Manual


------------------------------

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End of A6 Digest, Vol 111, Issue 18
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