You don't need to have a PART selected - but the external MIDI device (Camelot or otherwise) needs to send CC 7 messages on MIDI channels 1-16 (whichever target PARTs you want to control volume of).

Is your MODX in single channel mode? This may be part of why CC 7 doesn't work as I described above.

If you're willing to use Camelot - then I'd leave MODX in multi-channel mode.

I do keep it in Multi-channel mode, what I was trying to find out is if it is possible to send CC 7 messages to midi channels 1 - 16 at the same time for each part using a controller that only transmit midi on one channel at a time using Camelot or otherwise.

What would be helpful is a demonstration on how my goal could be implemented. Thank you for the reply though I didn't expect to get a response so quickly.

Have you setup the faders (on Oxygen) to transmit on the MIDI channels you need to target the PARTs you're trying to target?

Channel Assign: The Channel Assign function (Chan Asgn) assigns a knob, fader, button, wheel, or the sustain pedal to a
specific MIDI channel.
1. Press the Edit button.
2. Press the Select button or Control Select (Ctrl Sel) key.
3. Select the control as described earlier in this guide.
4. Press the Channel Assign (Chan Asgn) key. The LED display will show the currently assigned MIDI channel for the active
control (for example, "c.0.2." ).
5. Enter the new MIDI channel number using the number keys.
6. Press the Enter key.
When assigned to channel "0", the control (knob, fader, button, wheel, or sustain pedal) will transmit on the Global MIDI
Channel. See the next section, "Global Channel" for more information.

You should be able to set the Oxygen faders to CC7 and change the channel to each channel you need to target control of the PARTs you want. Camelot wouldn't need to do anything fancy - just pass through Oxygen to MODX.

The only reason to go this route is because MIDI is going to go in through the USB TO HOST port on MODX which is more capable than the MIDI TO DEVICE port. My understanding is that MIDI TO DEVICE is primarily to be able to control the piano keys. I'm not sure that advanced stuff like multiple MIDI channel targets is going to be respected using this new MIDI TO DEVICE feature.

I'm not sure what you're using to run Camelot on (iPad, Mac, or Windows). If you're using an iPad - then Lemur may be more powerful as it handles translating CCs as well as doing channel mapping. Camelot Pro cannot translate one CC to a different one.

I really don't think you need this - but if your MIDI controller only transmitted on a single channel then CC translation would be needed.

..

Oh ok thanks, I'm using Camelot on Windows and the midi controller on transmits on one channel at a time. The reason why I haven't connected the M-Audio directly to the Modx is because in order for me to layer parts and play those parts simultaneously the M-Audio would have to transmit on more than one midi channel hence the use of Camelot. I know I'll be able to assign CC 7 to each slider but when I do that, it only controls the selected part on the Modx and not the others, even when I'm able to play multiple parts at the same time with the help of Camelot. I guess this is due to the fact that the "Midi In" channel in Camelot is set to channel 9 (Which is what the M-Audio is set to as well), and even tho the midi output channels are set to 10 - 16, it is only able to facilitate playing the parts on the keys and not controlling the parameters of each part.

Oxygen has a global channel - but the manual implied that Oxygen faders, buttons, wheels, pedals could be set to something other than the global channel. I would assume that faders individually have control over MIDI channel and not faders as a group - but I don't have an Oxygen to verify.

You're going to need to have each fader transmit on its own MIDI channel or this isn't going to work with Camelot.

... the older Oxygen 49 (silver) states explicitly:

6. 9 Assignable MIDI Sliders (49- and 61- Note Only):
The Oxygen 49 and 61 have 9 assignable sliders that are fully programmable. Additionally, each fader can be assigned to an
individual MIDI channel.

... I would think follow-on products would have the same flexibility.