On Tue, Jan 29, 2008 at 03:14:51PM -0500, Garth Dahlstrom wrote:
> On Jan 29, 2008 2:00 PM, Ben Wheeler <[EMAIL PROTECTED]> wrote:
>
> > BUT it is similar to BUTTON and SWITCH which I think used
> > CCs with the same value, or something like it (I never understood the
> > difference between the two).
>
>
> (hand up) Oh, Oh, Oh! I know the answer to this one... [I'm the guy who is
> responsible for a switch being different from a button.]
>
> >From http://mixxx.sourceforge.net/wiki/index.php/MidiMapping
>
> - button - a button has a *Down* (non-zero) and an *Up* (zero) state,
> these occur together when pressed/released, this switch only triggers on
> the
> *Down*, *Up* is ignored. (Herc)
> - switch - a switch has a *On* (non-zero) and an *Off* (zero) state,
> these occur separately. (Herc)
>
> An example of a switch:
> On the front of the Herc Mk2 there is a Headphone monitoring Switch. When
> this switch is moved from Deck A to Deck B, you receive an "On" for Deck B
> and an "Off" for Deck A. When it is moved from Deck B back to Deck A, you
> get an "Off" for Deck B and an "On" for Deck A... So as you can see the
> "Off" state is not coupled in the same action as the "On" state.
>
> Where as with a normal Midi Button, you push the button creating an "On" and
> when you release you get an "Off".
Ok I understand the example a lot better than the description (occuring
"together" or "separately" seems to be reading too much into a
particular controller's layout -- surely what we're interested in within
mixxx is what messages are received, not how they were triggered?)
I still don't get why these have to be separate types. They seem
basically the same to me, and whether a button acts as an impulse
("on" only) or a toggle ("on" and "off") seems like it should be
a factor of its control's <NumberStates> in skin.xml, shouldn't it?
Am I missing something subtle to do with the different way the value
is calculated for these?
Ben
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