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. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
