Gear: Victory V22, using RET as signal input. Captor-X, using amp OUT, receiving MIDI PC from Morningstar 6 MIDI 5-pin OUT for cab changes only! Iridium for amp modelling, cabs disabled. Iridium receives MIDI PC/CC from Morningstar 6 via TRS Multiport to Iridium TRS Multiport.
I hear a high pitched drone when using the Morningstar 6 connected via TRS to the Iridium with it’s audio output going to my Victory RET input. If I disconnect the TRS multiport on either the MS6 or the Iridium, all noise goes away, as does ability to send MIDI PC/CC.
- Changed power supplies on all, no change.
- Changed MIDI cable, no change.
- Used an Radial isolating transformer, on audio output from Iridium no change.
Workaround is to use a Midi Mouse (w/ or w/o a common power supply), which means tap dancing to change amp models n the Iridium and cab models on the Captor-X simultaneously. Is there a way to isolate the MIDI output issue between the Iridum and MS6 while maintaining the ability to use both the Multiport (to Iridium) and the MIDI OUT (to Captor-X)? Did I miss anything?
SOLUTION FOUND! ::
I suspected it was a grounding issue (loop), did a bit if MIDI research, and found that it can and has happened in the past with other gear. I simply cut the ground on one end of the TRS cable and voila, golden silence & the ability to switch cabs via MIDI on the fly! Where does the fault lie - with the MS6 or with the Iridium, or both? I’d love to hear your thoughts on this as swapping out a simple TRS cable is no longer an option with molded ends!
Solution #2 may be using a TRS with no RING connection. Iridium RX’s on TIP, and sends MIDI out on RING connection., but the GND would still be there, so not sure if I could get a TIP only cable to work between the Iridium and the MS6 (I did!) SO, you only need a TIP only signal to the Iridium from the MS6 w/GND cut on one end, assuming the cable ground thru to other end is connected (as with molded 1/4" plugs, which is likely standard.)
