Effects provides: nice reverbs (Room, Flat, halls, orchestral, gate delays ...), transparent, fine delays "analog" (rglage the damp), tap tempo button for delay and reverb: super live!, Harmonizers Smart (SETTING THE range), Leslie superb chorus until 4-way (I have not seen elsewhere ..) flangers ditto, ditto phasers, detune, pitch shifter, compressors, gates, equalizer until 6 paramtriques bands or bands carrment paragrahique 2x31 (but there remains the power for something else: it's more a dmo power of using a bte concrte ) ...

The bbte is powered by 2 processors S disc (1 single on the studioquad), which explains the power of 4 channels.

Connecto pro jack and XLR-10db and +4 db: it fits everywhere!
Option card AES / EBU (single cable is sufficient to adapt gnralement SPDIF).

UTILIZATION

The factory presets are great.
For programming, a request Ceratina a technical level, because we ACCS All parameters of each effect. So it's long program ...
Gnrale Ergonomics is good, but the routing inflexibility, forcing adapt to routing configs block effects pr-configure.

SOUND QUALITY

It sounds much more expensive than its price (see: www.george.shilling.com/Reviews/digitech400.htm). The reverb is superb, not much envy Lexicon and TC, but a demand for the program to fit the context, may therefore be a little more work.
On vocals, drums, acoustic instruments, it is nickel.

OVERALL OPINION

I used live and in studio. Live, it can track a group by bringing with you its effects: no surprises, no making head fit a little known multi-effects, especially effects carefully tailored each piece ( tempo> pr-time limit of reverbs, etc.).
It's a good working machine, temperatures requiring good technical skills.