Sigma DeltaRemote Controlled Analogue Summing

SSL Sigma

Feature Detail

Sigma is powerful and very flexible.
It has 16 stereo input channels which can be individually switched between being mono or stereo for up to 32 channels at mixdown. There is accurate metering for all channels via LED meters on the Sigma hardware unit. There are two stereo mix busses with dedicated outputs and individual stereo insert points to facilitate implementation of parallel compression or convenient printing of stems back to the DAW with processing applied. Mix Bus B can also be injected into Mix Bus A for final mixdown. Providing further flexibility, Mix Bus A & B inserts also include an 'insert sum' feature to sum the insert return to the mix bus.

Each input channel also features individual direct outputs for printing individual channels back to your DAW. The inclusion of direct outputs streamlines integration of analogue processing, with a typical configuration connecting DAW I/O outputs to outboard processor inputs, then processor outputs to Sigma inputs and Sigma direct outputs back to the DAW I/O. Unlike "dumb" analogue summing boxes, with this configuration, the gains of each channel on Sigma are automatable POST the outboard processors eliminating the effects of volume change inside the DAW riding into outboard compressors.

SSL Sigma

An Artist and Studio monitoring section provides separate Monitor and Headphone circuits. The Main monitor output has Main and Alternative connections to accommodate 2 sets of monitors. A comprehensive switching matrix enables selection of monitor source and output. A large front panel level control uses a push-select mechanism to determine whether it adjusts Mix A, Mix B, Main Monitor or Headphone. There is also a Talkback input with adjustable Dim level. A handy front panel ijack input (3.5mm stereo socket) feeds into the monitoring section.

The Sigma Remote app offers full control of all Sigma functions plus store and recall of saved settings. It runs on a Mac, PC, iOS or Android tablet device and connects to your workstation via Ethernet (or wirelessly from a tablet via a wireless router). The user interface provides a series of intuitive pages that makes controlling Sigma's powerful feature set straightforward. Three main screens provide control and setup of the Master Section, Channel Control and Global Settings parameters. Every parameter can be saved for future recall making swapping between projects simple and efficient.

Sigma δelta supports full direct remote control of the mix engine from any SSL MCU-compatible control surface. Supported channel functions are level, pan, solo, mute, mono/stereo, and mix bus routing. Channel labels as well as volume and pan data are returned to the surface for display. The Dim, Cut, Mono and Alt monitor functions, as well as Talkback, can be controlled from MCU F-Keys. MCU control is via MIDI over Ethernet and shares the same Network link as the Remote app and δelta-Control. Similar functionality is also available with Eucon enabled devices.

The Sigma rack unit houses the analogue summing engine, provides connectivity, a set of bright status and level LED's, hardware controls, headphone socket and ijack input. A pair of user assignable dual action push/hold buttons on the front panel plus a foot-switch input can be assigned to the master section functions. The rear panel provides dedicated XLR connections for the Mix Bus A and the Main and Alt monitor outputs. The individual line inputs and direct outputs are connected via standard 25pin D-Sub. An additional pair of D-Sub connections handle Mix Bus inserts, Mix B output and line level Talkback input.