Boss
Boss FS7 Footswitch
When using the FS7 as an Aux Switch, the FS7 needs to be powered in order for it to work as a momentary switch.
The polarity setting needs to be set to II and Mode to MOMENTARY.
As usual, a Stereo TRS cable needs to be used - a Mono TS cable will not work.
Boss RC5
Connecting the MC6MK2 or MC8 to the RC5.
You can connect it in a couple of ways:
1. Using the DIN5 MIDI OUT from the MC8. You will need to use a 5 Pin MIDI to 3.5mm TRS Type A cable. Boss sells this: https://www.boss.info/global/products/bmidi-5-35/
If you purchase from Amazon or other websites, do note that it needs to be labelled as Type A, as there are many variations around with different connections.2. Using the 1/4" Omniport from the MC8. You will just need a 1/4" to 1/8" TRS cable for this. You can also just use a standard 1/8" to 1/8" TRS cable, and then a 1/8" to 1/4" adaptor like this:
https://www.taydaelectronics.com/hardware/6-35mm-1-4-plugs-jacks/3-5mm-female-to-6-35mm-1-4-male-stereo-audio-jack-adaptor-gold-plated-total-length-4-4-cm.html
Boss RV-500 / DD-500 / RC-500
There is no CC MIDI Implementation chart for these devices. You need to go into the MIDI menu in the device to map the functions to a CC number.
More info on recalling presets here: https://forum.morningstar.io/t/mc6-dd-500-how-to-select-presets-in-other-banks/1138/2
Boss DD-200
There is no CC MIDI Implementation chart for this device. The functions needs to be mapped to a CC number to control it. Same goes for the PC number to recall the Presets on the DD-200.