I have the two connected with midi and it basically works great. And like you suggest, I am even using the TF as a compact midi switch to send program changes to both the MF and the Axess GRX4 loop switcher. This is pretty slick with the addition of a simple aux button to give me four foot switches ("program a" "program b" "bank up" "bank down"). So far I haven't needed a dedicated midi foot switch but depending on how many and the configuration of my presets, it may become necessary. Below is a kind of rambling post I made to another forum about connecting the two pedals. By the way, it's great to see the bypass idea could show up in a future firmware.
"I'd like to share what I've found regarding the Eventide pedals'
control and integration capabilities. For those that don't know, these
are digital delay and modulation pedals with expression pedal, 3-aux
switch, and MIDI support.
The pedals have an intuitive program change map that defaults to patch
1:1-> pgm 0; 1:2 -> pgm 1; 2:1 -> pgm 2, etc up to 20:2 ->
pgm 39. Because of this, all that's necessary are two or three tweaks
from 'out of the box' (turn on midi program changes, turn on midi
output) and the second Factor will change patches in parity to the
first Factor. That being said, both the transmit map and receive map
are completely customizable, and my concept at the moment is to have 4
or 5 delay patches that will sync with 2 or 3 modulation patches. You
can assign the same program change to multiple patches, so that the MF
could use patch 12:1 when the TF changes to either 8:2 or 15:1, etc.
Moving from program changes to continuous control, all of the knobs and
optionally, the expression pedal, can generate cc messages on a
user-assignable ID. You could use a Factor pedal to control audio
or USB MIDI). I've tested this with MIDI-OX and it's more or less plug
and play. More interestingly, the "second" Factor pedal can assign
incoming CC changes to any of its own knobs. I've tested this will all
the assignable knobs, and it works fine. Here is an example: I set the
'mix' knob on the TF to program a CC that, on the MF, I map to the
'intensity' knob. So as the mix gets wetter on the delay, the
modulation gets more "intense". More than one knob can be mapped to the
same CC, however there is a GUI issue where the receiving pedal seems
to only display the new value of the highest-id knob that was changed,
but I definitely hear both of the assigned knobs' value being changed.
Either or both pedal could have an expression pedal or 3 button aux
switch plugged in. For my purposes, I'm only using one exp pedal and
aux switch. The expression pedal can be assigned to one or many of the
knobs- and not just 0 – 100, but to a custom range, including some
knobs turning 'up' and others turning 'down' in the same motion. I do
agree with some of the user reviews online that it is a little
cumbersome to program the exp pedal (especially to 'remove' it from
assigned knobs). If Eventide could have just put a little 'clear / set'
button somewhere out of the way, certain programming, like the pedal,
would be a little easier. The pedal will even encode the exp. pedal
with MIDI CC messages– which, yes can be mapped on the receiving
Factor pedal as well to allow the exp pedal to control very different
mappings on each pedal simultaneously.
I did find a niggle with the exp pedal and MIDI assignments. Let's say
I've programmed knob 1 on the sender Factor to manipulate knob 1 on the
receiver Factor. When I turn knob 1 on the sender there is a 1:1 update
on the receiver's knob 1 (or other midi-cc assigned knobs)- no sweat.
BUT, now let's say I assign the exp pedal to a range of values on the
sender's knob 1. When I move the exp pedal (connected to the sender
Factor), the sender knob 1 values update just as expected, but knob 1
on the receiver does not change- rather, the parameters assigned to the
receiver's patch's exp pedal CC ID change instead. I'd have to think
for a while before deciding that this is a smart move on Eventide's
part or just an oversight.
The Aux switch input accepts any of the three combinations of Tip, Ring
or Ring+Tip. Using a mono cable and a paper clip, what you'll create
are Ring+Tip inputs. The aux switch can be assigned to the parameters
you'd guess… looper start (TF), brake (MF), bypass on, tap tempo,
bank up / down, and a few more and I've tested most of these and they
work fine. Smartly, the AUX switch can be setup to just duplicate the
three built in functions- I imagine for use in a situation where the TF
is racked or on a shelf for you to control live. Something I wouldn't
have expected but find intriguing is that an aux switch can be assigned
to a knob to set a min and max value. I tested this by assigning my aux
switch 1 to knob 1 (delay mix), with 10:2 as the min and 2:10 as the
max. The TimeFactor is a dual delay, so with that example I can switch
between primarily delay A and primarily delay B to create a kind of
"sub patch". While the exp. assignments are unique to each patch, the
aux switch settings seem global, although multiple actions can be
assigned to the same switch inputs (T, R, and T+R).
And, much like the exp. pedal, when I assigned the aux switch to toggle
between two values of a particular knob on the sender Factor, and I
then mapped that knob to a knob on the receiver Factor with MIDI CC,
the receiving knob does not change when the sending knob's parameter is
manipulated with the Aux switch.
Another feature I haven't been able to make work is MIDI clock syncing
between these two pedals. I was able to sync a drum machine with the
TF, and that was elementary. But there too I did find something a
little quirky: Let's say the looper is in 'beat' mode (i.e. tempo is
flashing on the TF and time elapsed is described as beats, etc). In
such a case, I was able to sync the beat display from a drum machine,
but found that the record start / stop / and play events on the TF
didn't align with the drum clock. It seems like it would be so easy for
the TF to make the loop start and stop at the next 'beat' after button
press, but this could be a bad assumption.
Since I have almost no experience with other effect pedals, I'm not in
a good position to review the actual sound these make… though they
sound great to me."