Hi Mike
the Holdsworth thing!
Technically there is no reason why this isn't possible as for any other line level capable fx, once the signal has been *safely* treated to line level.
The question about "coloration" really applies to the signal reconditioning. As Holdsworth has many times ackowledged, the devices used for such task have a strong tendency to sound coloration. On the other hand any time domain fx used in a pro rig should be run in parallel, by means of line mixers or routers. This ensures everything works at the best.
Eventide converters are probably the best ever used in fx devices, in term of sound transparency, dynamics and headroom. I wouldn't really be bothered by this…. what is the thing I worry about is the signal "reconditioning"…to get THAT at pure, natural tone quality, is still not easy.
all the best
I
