if the contour is same as on dbx compressors, it's same as low cut
http://www.dbxpro.com/1066/1066.php
# Contour switch removes unwanted low frequency information from detector circuit
Well actually the "contour" knob on the SE is more like the contour knob you can find on some Marshall amps or some wah pedals for instance :
This is the SE user manual description :
CONTOUR :
Contour shapes midrange frequencies for Main Channel 2's Lead I and Lead II modes.
When activated, Contour boosts low mids from 300 to 600 hertz as well as the frequency at 1500 hertz. Note that the Contour setting influences the functionality and range of the Mid knob (30). The LED above the button lights up to indicate is activated. This feature may also be switched via MIDI program change or the ENGL Custom Z-9 Footswitch.
A tip from the designer:
Though this voicing section is passive and its control range is therefore somewhat narrower, with Contour and Mid Edge you have two additional tools available for shaping the midrange. And for good reason music is made in the mids, and these frequencies are critical to dialing in happening lead tones. You can employ to scoop mids radically and conjure rabid heavy metal tones or boost them to elicit assertive lead sounds.
MID EDGE :
This sound-shaping tool addresses midrange frequencies by slightly lowering the Mid knob's frequency spectrum. The LED above the button lights up to indicate is activated. This feature can also be switched via MIDI program change or the ENGL Custom Z-9 Footswitch.
Atip from the designer:
Like Contour, is a passive voicing feature. Consequently, its effect on the
soundscape is rather subtle. Technically speaking, it actually re-voices the Mid knob.
Activating Mid Edge smoothes out lead tones' rough edges. Deactivating Mid Edge and Contour thins out the lead tones' midrange, creating a more brittle tone. This brand of tone is better suited for rhythm work because it is not as aggressive or overly assertive. Different combinations of Contour and Mid Edge yield four additional tonal variants in Main Channel 2, and these variations can be programmed, stored and accessed via MIDI.
-> MEANS i'm gonna try different combinations with those knobs next time
