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Is it possible to setup several keygroups, each of which will talk to the same AU plugin over different MIDI channels?
At the moment if I want 3 different patches independently controllable in a plugin such as Omnisphere, I can load up the plugin in 3 keygroups, but I get 3 instances. Omnisphere is quite capable of running dozens of sounds from a single plugin instance, so was wondering if there was some way of splitting up the output from the eigenharp and routing it to just one plugin.

Is there a way to do this that I'm missing, or will I have to wait for the work bench?

I often have an omnisphere patch on one keygroup and a trilian bass patch on another, and since the newer versions of the spectrasonics plugins let you run trilian patches inside omnisphere, this kind of setup would mean I can further reduce my plugin count.

I suppose the overhead of the plugin itself is quite small compared with the actual size of the sample libraries involved?

Silly question probably, but if you set the maximum to 1, does this cause everything to come out of the same MIDI channel?

Ah no, sorry, misunderstood.

I was just playing with Electri6ity and was asking myself this exact question... can you have two keygroups going to the same AU but different MIDI ports?

I have been thinking the same thing for Omnisphere.. I thought I would give this thread a bump to see if anybody has figured this out.

Another thing I was thinking about would be to have a quick way to change midi channels from within the same keygroup. Say I'm in keygroup 1 and playing midi channel 1 on Omnisphere. It would be great if I could just push one key and I would be playing on midi channel 2. I have a piece of music I would like to play where the "lead" instrument needs to be changed very quickly. Being 4 to 5 different instruments it doesn't make sense to try and set them up in separate keygroups. If I could just swap midichannels that would make the most sense.

midi converters??

AU agent??

I just read your post but don't have a clue what you said (well maybe a little). I am an absolute beginner and have so much to learn.

My Tau came a little over a week ago, I have been practicing scales, trying to learn about modes and how to record loops while trying to absorb as much knowledge as I can. I have a thousand ideas and huge ambitions. There's just not enough time in a day!!

I will be ordering EigenD Pro this week so will have Workbench. That should help me visualize how things work.

I also have a virus that I eventually want to use in my setup.

ok, bad news ... there appears to be a bug in EigenD which means this will not work!

bit technical to explain what the issue, but basically, the audio unit agent can accept its normal input and ONE additional midi input source.

in the above example, it can work on midi channel 1 & 2 but no more than that.

this is a pain, because I already had connected by virus keyboard and the eigenharp, so I cannot use it for splits.

for the technical minded the issue is midi input on audio unit agent, although will accept multiple connections it will only process the data on one channel (the first that connects.
the same bug exists on the midi output agent which explains why a new midi output is created for each rig.
(id wondered about this before... as they are on separate midi channels, why create separate virtual ports, they could all be on one... well the reason is because the midi output agent cannot process multiple rigs midi signals!)

Yeah the original post (and my requirement for Virus) is to have multiple midi channels to same AU at once eg for splits
If you one only need one at a time, then yes midi rigs and au agents can have their channels changed from a talker.