[sdiy] How much DMM accuracy do you need?

[thx1138]

On 10/7/09 9:54 AM, "Needham, Alan" <Alan.Needham at centrica.com> wrote:

> 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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Hi Guys,

The Majority of synths were design to be 1v/Octave.

There were exceptions on some machines that could be retuned such as the
Prophet V Rev 3.0 versions machine.

It could be retuned to play various scales and Macrotonal/microtonal
variations.

This would allow tradional instrument tunings.

Still most people use 1volt/Octave as a general tuning.

Regards,

Terry