Casio CZ/ VZ/ FZ - Pro Series

Hi Jon,

Yeah, a stopwatch is pretty imprecise to measure this kind of thing.
If a person wanted to try to time somthing, a pitch envelope might work
best.

[Linearity]
The manual text actually spoke of the various rates being angles.  
I need to look at the manual to find out whether it says anything about
the relationship between the levels.
I suppose an exponential relationship between levels would be a way to
produce an exponential envelope.
That would make for some graininess when changing between low levels.
The CZs were early digital technologly.  I wouldn't be surprised if the
envelopes were linear.  A book about synthesizer construction (early 90s)
mentioned that digital envelopes were, very often, linear.   

I want to make sure I was right about somthing else:
If Rate represent an angle and Level relationships are linear, would I
still have been right about the time relationships?
If one draws a line between two parallel lines, does a 10 degree angle
produce a line twice as long as a 20 degree line?  
And is this relationship linear?  I.e. would the 10 degree line be three
times as long as a 30 degree angle?

[Possible usefulness of a calculator]
Perhaps a calculator would still be useful even if one couldn't find the
exact miliseconds involved.
If the envelopes are linear, you might be able to synchronize your Amp
Pitch and Wave(brightness) envelopes to end their attacks at the same
time,etc. 

<Synchronize your envelopes>
Using the [Rate x Time = Distance] equation you could make envelope's
"Time" equal.

1. Find the arbitrary "Time" of your first envelope:

Devide your first envelope's Distance (between the two levels) by it's
Rate.  
This will give you an arbitrary "Time" value. 
Distance / Rate  =  "Time"  

2. Use the "Time" from your first envelope to find the Rates for your
other envelopes:
 
Next, divide the Distance (Between levels) of  your other envelopes by
the "Time" of your first envelope to get the appropriate Rates.
Distance / "Time" = Rate


Thanks for the good discussion.

Yours,
Nathan 


On 25 Mar 2002 12:07:14 -0000 CZsynth@yahoogroups.com writes:
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> There is 1 message in this issue.
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> Topics in this digest:
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>       1. RE: Digest Number 137
>            From: "Furman, Jon W." <jfurman@...>
> 
> 
>
________________________________________________________________________
>
________________________________________________________________________
> 
> Message: 1
>    Date: Sun, 24 Mar 2002 13:43:14 -0500
>    From: "Furman, Jon W." <jfurman@...>
> Subject: RE: Digest Number 137
> 
> Nathan your thoughts are good in theory but there are a few things 
> that
> complicate this in practice. The first is that at least my ears 
> aren't
> sensitive enough/fingers fast enough to measure the envelope changes 
> with a
> stop watch.  Maybe you might be able to get some kind of 
> approximation but
> I'm too deaf and slow to even come close. And the big issue is that 
> you're
> assuming that these rate/level relationships are linear and I'm 
> pretty sure
> that they're not (at least on most synths). That is the time 
> represented by
> a rate of  50 going from level 1 to 100 is not 5 times the time of a 
> rate of
> 10 going from level 1 to 100. To make matters worse level 50 is 
> probably not
> 5 times the volume(or whatever) of level 10. See what I mean? I know 
> that in
> the synth manuals they always draw the envelope diagrams with 
> straight lines
> but I believe that if you were to graph those values in real life 
> all those
> lines would be curves.
> 
> Jon   

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