Hello everyone, i pick up a old cheap oscillascope to put my MOTM through,
http://www.teklab.com/~weld/pix/eicoosc.jpgit has no probes, so i was wondering how you all would connect to the motm? I
would just like to see the final waveform on the scope.
Thx
Jim
thomas white wrote:
> Hello all,
>
> I recently bought a little $20 Korg chromatic tuner to calibrate/tune my 300
> VCO's with. Let me say this thing works great for this job!!! My MOTM sounds
> so in tune it scares me now. What a way to discover how tone deaf you
> actually are when trying to use only your ear. Now I get the slowly beating
> lead I wanted all the way up the keyboard and not just in a 2 octave range.
> Highly recommend proper 1v/oct tuning!
>
> Thomas White
>
> PS. No resistor change either.
>
> >From: "Dave Bradley" <daveb@...>
> >Reply-To: motm@egroups.com
> >To: motm@egroups.com
> >Subject: [motm] Re: MOTM-300 and cheerleaders
> >Date: Tue, 15 Aug 2000 01:31:31 -0000
> >
> >--- In motm@egroups.com, "thomas white" <djthomaswhite@h...> wrote:
> > > Hey fellas,
> > >
> > > I have noticed in my two VCO system that when I use the transpose
> >switch on
> > > my Roland M-181 keyboard or play higher up in scale thru my Kenton
> >that the
> > > VCO's do start to sound flat or slightly off key. Especially one
> >compared to
> > > the other.
> >
> >A little detective work is in order here before you blame your 300s.
> >
> >First, it's hard to please 2 masters, so to speak. Your Kenton and
> >Roland may be calibrated slightly differently. If so, you will be
> >able to calibrate your 300s to play in tune with one or the other,
> >but not both.
> >
> >Second, the Roland may track fairly accurately when you play the
> >keyboard, only to introduce errors when you use the octave switches.
> >
> >If the 2 vcos track differently than each other using the same
> >source, you need to calibrate them as closely as possible.
> >
> >If they stay in tune with each other in the low mid range, but get
> >further out of tune in the higher range, you may have one that needs
> >the high frequency tracking resistor change that Paul mentioned. The
> >problem with only 2 vcos is that it may be hard to tell which one is
> >tracking correctly, and which one is not linear.
> >
> >My fave calibration technique is to beat a tracking vco against a
> >nontracking drone vco. Hendry likes to feed the drone into the 120 to
> >get exact suboctaves, so you can do close comparisons over many
> >octaves.
> >
> >Moe
> >
>
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