Pre-delayed signal into reverb is a standard studio technique, that goes back to at least Motown. Youâd have tape delay at a couple lengths into EMT 140 or chamber. Later on engineers would use a favorite rack delay like a PCM 42 paired with reverb.
You could also use sends to various plates and chambers and sends to delays and mix them.
A result of predelay is better separation of mix elements and more foreground sound for vocals with just right amount of ambience dialed in. Not mush.
Wet signal into delay would be less the norm, but was certainly done from time to time.
In any case, I think the halo design is actually better and more standard now. Still, I agree it would be nice to be able to toggle it to affect dry signal. Itâs also possible there are filters prior to the delay or the Halo in the Mimeophon as part of the Color implementation. This would be like eqing an FX send.
A separate reverb for the dry signal (two mimeophons) and submixes would offer the most control. I havenât heard a modular fx unit that is good enough for the latter.