Characteristics of a ESP type of device...

[Magnus Danielson]

Hi!

I came to wounder what characteristics one should be able to measure on a
Hz to CV converter like the MS-20 ESP etc. Thus, what diffrent figure of merit
could we note that diffrent solutions have. It was just a little interesting
exercise to figure on, and I would like to hear some opinions on this...

Here are a few ideas that poped out of my head...

Input Sensitivity
	Input Dynamic range (noise floor and clip level)
	Input scaling range
	Input scaling method: Static, Manual, Auto

Selectivity
	Method: BP, LP + HP..
	Range: Fixes, Manual or Automatic
	Tracking: Yes/No
	Range & BW
	Stop band rejection
	Slope steepness

Envelope follower
	Dynamic range with (+/- 3dB accuracy)
	Rise time (static value or range)
	Release time (static value or range)
	Offset error
	Signal leak through

Trigger/Gate
	Trigger level (static or range)
	Trigger type (fixed or peak relative)
	Peak release time (static value or range if available)
	Gate hold time (if available)

Hz to CV converter
	Scale type: linear, exponential
	Tracking linearity (+/- cent for range)
	Offset error
	Rise time (for say +/- 25 cent estimate)
	Dead input residue state: 0V, fixed value, hold
	Max tracking speed (for sine sweep) in Hz/s and oct/s

Should these be feasable to measure, use for judgement of relative
applicability in real life, missing some important fault or having totally
irrelevant information. Note that I had various forms of curcuits in mind and
naturally diffrent limits applies.

Cheers,
Magnus