The Sigma from Solid State Logic is a remote controlled analog summing mix engine that brings the sound of an SSL console together with the workflow advantages of mixing in a DAW. Sigma uses the same Superanalogue technology as SSL's Duality and AWS consoles, offering analog summing with an extended frequency response, precision stereo imaging, depth, and clarity. Additionally, the unit can be controlled remotely using MIDI control and automation data from a DAW or hardware control surface.
Sigma's rear panel offers 16 inputs via DB25 that are switchable between mono and stereo, offering a total of 32 channels at mixdown. Each input also features an individual direct output for printing individual channels back to your DAW. Two pairs of stereo mix busses, each with dedicated outputs and stereo inserts for implementing parallel compression and convenient printing of stems back to the DAW. Additionally, Mix Bus B can be routed into Mix Bus A during final mixdown. The studio monitor section offers two pairs of monitor outputs; Mains and Alternative. A separate artist monitor output features a comprehensive matrix system for signal routing with front and rear panel output connections.
The front panel offers accurate LED metering for all inputs and the master meter. Pressing the push-button rotary control cycles through monitors, headphone, Mix A, and Mix B, while turning the knob adjusts the level control. The LED ring around the level control offers visual feedback of level setting with the red LED indicating 0 dB. All levels are scalable between +18, +22, or +24 dBu. The two user buttons offer four controls and are user customizable. By default, they are set up to control main and alternative monitors, mono check, loud speaker mute, and loud speaker dim. A 1/8" stereo jack input on the bottom right of the interface offers connections for any audio playback device, such as MP3 players and iOS devices.
While much of Sigma's controls are available from the front panel interface, the system offers complete control through a web browser interface. The Channels page is used to configure each of the 16 channels, while the Master page is used for monitor configuration, user button settings, and MIDI learn functionality. The Settings page provides additional configurations with DAW protocols, controller setup, network connections, and miscellaneous settings, while all settings can be saved and recalled. The web browser interface also allows the unit to be wirelessly controlled via iOS devices or other tablets.
Once the system is set up, Sigma is controlled by the first 16 channels of your DAW, allowing for full automated control over the mix engine. Outboard processors are typically connected inline between an optional audio interface and Sigma. The DAW controlled mix engine circumvents the issue of DAW volume changes affecting outboard signal processors, like compressors, during mixing operations. The Sigma ships with an AC power adapter.