Re: [LAU] So what's the deal with controlling the aeolus organ stops via midi

Hey Fons,

Yeah, I'd say for my needs, I can just create a few presets and just cycle
through them as needed!
Thanks again!

Andrew.

On Sun, Oct 4, 2009 at 11:18 PM, Fons Adriaensen <fons@email-addr-hiddenwrote:

> On Sun, Oct 04, 2009 at 03:33:46PM +0200, Dominic Sacré wrote:
>
> > Unfortunately it's not that simple. Most hardware MIDI controllers will
> > let you send continuous controller values or toggle between two values.
> > But to control the stops in Aeolus you basically need to be able to
> > manipulate individual bits of the controller values...
> >
> > Some time ago I wrote a small script that might be just what you need.
> > It uses mididings (http://das.nasophon.de/mididings/) to convert normal
> > MIDI controllers (one CC for each stop) to Aeolus' CC 98. You'd just
> > need to insert it between your MIDI controller and Aeolus.
>
> The basic problem here is that MIDI doesn't have anything
> close to what is required. On a pipe organ you can switch
> each stop on/off independently of all others. MIDI is not
> designed to do that, its 'preset' model is something quite
> different. The standard Aeolus setup has around 55 stop
> buttons, and that amounts to more than 2^55 ~ 3e16 =
> 30000000000000000 combinations or 'presets'.
>
> The easiest way to control Aeolus from MIDI is to create
> a number of presets in Aeolus (it can have up to 1024)
> and then use the standard MIDI messages (bank/preset) to
> select one of them.
>
> If you really want to control individual stops that is still
> possible using normal controllers. You need (for the standard
> instrument) 4 buttons to select one of the four groups, and
> 16 buttons to select a stop within a group. If you organise
> things this way then each button just needs to send a single
> controller message.
>
> The essential thing to understand is that switching a stop
> on/off is a two-step process. First you select a group and
> and action (on/off/toggle), then you select a stop within
> that group. The first (group/action) message is stored, you
> only need to send it when it changes. This is really no more
> complicated than the concept of preset banks.
>
> Apart from all this, mididings is the perfect tool to
> manipulate all things midi. Using it you can map Aeolus'
> control messages to whatever you want.
>
>
> Ciao,
>
> --
> FA
>
> Io lo dico sempre: l'Italia è troppo stretta e lunga.
>
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Received on Tue Oct 6 16:15:03 2009