Digital graphic equaliser remote controller offer control of 31 bands of Helix graphic equalisation and have 31 motorised 100mm faders representing frequencies from 20Hz to 20kHz on 1/3 octave centres to BS EN ISO 266:1997. User interface shall provide for four banks of 32 channels of user-assignable channel access, implemented as four bank and 32 channel non-latching illuminating pushbutton switches. Four non-latching illuminating pushbutton switches provided for the selection of groups, each of four groups permitting relative adjustment of multiple channels of Helix graphic equalisation. There shall also be non-latching illuminating pushbutton for global access of all addressable channels of Helix graphic equalisation and applying relative adjustment to all channels. Non-latching illuminating pushbutton shall also be provided to bypass currently selected channel(s) of Helix graphic equalisation.