In principle: yes, you should be able to do this. If you have a loop switcher device that can reconfigure itself in response to Midi Program Change messages then you can do this,
Skimmed the manual for the Lehle here (http://www.lehle.com/products/D_Loop/Lehle_DLoop_SGoS_Manual.pdf) and it does appear that it will support MIDI channel switching with Program Change messages (sent from the HD). Other devices such as the Voodoo Labs GCX do also I believe. Suggest you send a query to the vendor's web site if you are nervous about this setup but it looks fairly straightforward. One catch is that you need a special 1/4" TRS ===> MIDI cable to make MIDI happen. Not a huge deal but something to consider.
As a side benefit, you can send MIDI Program change messages from within a patch using the 1-4 switches. Just assign a program change message to them (note that it will not toggle though).
The hookup iwth 4CM is entirely possible and should work as you describe. The one thing you really need to stay aware of levels at the amp input.
- drive it too hard and you may have trouble getting good clean tones or a garbled distortion tone.
- Too weak and your sound will be anaemic.
Stay mindful of the output levels of your pedals and the loopers and you should be fine. Try and keep the basic level around the same as when you plug a guitar in (unless you are deliberately driving the input hard with your distortion pedals. Expect to have to fiddle !!!
I have a Voodoo Lab GCX that I use with my HD Pro and HD500. By assigning MIDI Toggle messages on the appropriate channel/CC to footswitches on the HD unit, I send the GCX messages to open/close loops/switches when the patch loads. Usually, I assign these messages to switches I won't use, like the bottom four patch changing switches on the shortboard/500.
Right now, I'm using the GCX for amp channel switching, but I've also used it to switch pedal loops in and out of the chain.
Jim and Karl,
Thanks! It sounds like it will work as I imagined then - which was my assumption but wanted confirmation. I emailed Lehle's American Distributer and they gave a very short and no so helpful answer basically saying that does accept MIDI changes.
Now that it seems this will work as I want it to, could either of you point me to a tutorial on how to program MIDI on the HD500 as I described above in the original post? I haven't had any luck finding one.
Any suggestions as to what loop pedal to use, Lehle, Voodoo Lab, etc? The Lehle is small enough that I can fit it on my board with no problem but if anyone has experience with this type of setup and prefers one particular unit over another then I'm all ears.
The Advanced manual should be your first port of call, found Here ==> http://line6.com/data/6/0a06434d5f004f286bebc8142/application/pdf/POD%20HD500%20Advanced%20Guide%20-%20English%20(%20Rev%20B%20).pdf
This gives good info on using Midi with the HD. Most of the good stuff is in the Appendix B. If you need clarification or advice on strange behaviours then search this forum.