AW: Re: Edit modes (was: Re: an idea ...

[Haible_Juergen#Tel2743]

>   (Alas) I haven't used any Obie stuff with knobs. When you say 
"relatively"
> do
>   you mean that;
>   -You switch to a patch
>   - You turn a knob to the right and that value goes "up"
>   - regardless of what it's setting was?
>
>   This implies encoders and not pots for the controls - doesn't it?
>   In this case, both methods don't use the same hardware - what am I 
missing
>   here?

No, it just uses simple pots. It works like this (asumuming a range of
0 to 1):
Say we start with a stored value of 0.3 and an initial knob position of 0.6,
and you want to increase the value. So you touch the knob, increase it
by 0.1 to 0.7, so the internal voltage will also be increased by 0.1 to 0.4.
So you have a smooth realtime editing without a jump. Of course this
finds a limit when your knob reaches 1 (cw end position), and the internal
value is just 0.7.
If you want to go up further, you have to turn the knob fully back at its
ccw end position. As soon as you reach 0.3 with the knob, the internal
value reaches 0, and of course it will still be 0 when the knob is at 0.
This is detected by the software, and if you start turning the knob right
again, the internal value follows the external value exactly.
So you have the advantage that you can do smooth real-time editing,
and to enter an absolute edit mode, just turn the knob fully to either
side. What sounds complicated in description is very easy and
comfortable in reality, as soon as you get used to it. Especially when
the potentiometers are types with low torque, as in the Obies.

JH.