[sdiy] How much DMM accuracy do you need?

[Needham, Alan]

Does it really matter if your synth works at 0.999v/oct or 1.7v/oct?
As long as everything ties up within *your* system what difference does
it make? The important thing is to make it >sound good< 
I have one synth working at 1v/oct (nominal), one at 0.35v/oct and one
on v/Hz (yes, I do interconnect them all).

A good meter needs to have repeatability and resolution as well as being
"accurate" - I guess the latter means it is calibrated to some higher
authority, a better meter at a calibration house, without this the whole
issue is moot. Who checks the checker?

My 20 year-old 3.5digit Fluke has never been calibrated!

	Alan - out of cal as usual!


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Jerry
Gray-Eskue
Sent: 07 October 2009 13:43
To: Synth-diy at dropmix.xs4all.nl
Subject: RE: [sdiy] How much DMM accuracy do you need?


Maybe one of the most demanding measurements is related to the 1Volt per
Octave. If you are tiring to get high accuracy and measure it to 1 Cent
you
have 1 Volt / 12 semitones / 100 cents = 0.000833333... Volts per Cent.


- Jerry


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