Tri-directional control with Sigma δelta
Sigma δelta offers users three additional features that facilitate full simultaneous tri-directional control of Solid State Logic’s Sigma analogue hardware. The upgrade to the Sigma Remote Controlled Analogue Summing System adds δelta-Control (δ-Ctrl) compatibility, a Remote Control App and direct MCU control.
Already introduced for SSL’s Duality and AWS consoles, δ-Ctrl uses DAW plugin architecture to enable analogue signal path automation from a DAW. According to the manufacturer, the introduction of δ-Ctrl for Sigma streamlines both working with Sigma as a standalone mix environment and transfer of sessions prepared using Sigma to Duality or AWS equipped studios.
The main interface for δ-Ctrl is a native AAX/RTAS/VST/VST3 plugin that allows automation of Sigma channel volume as if it were a DAW plugin. The automation system in the DAW is used to record and playback Sigma volume control data entered either directly from the fader in the plugin GUI or from an MCU control surface which is controlling Sigma directly. The δ-Ctrl plugin is inserted into a DAW mixer audio or aux channel. The plugin then receives and sends volume data from Sigma δelta via an Ethernet connection. Audio on the DAW track passes through the plugin slot unprocessed.
Sigma’s volume and mute switch are represented as plugin parameters in the δ-Ctrl GUI and their automation data is recorded to the automation lane of the selected DAW channel. In playback the plugin converts the stored automation data from the DAW into δ-Ctrl messages and routes these back to Sigma via the SSL Logictivity Network connection.
Automation data can reportedly be viewed and edited as normal plugin data in the DAW tracks. The manufacturer explains that Sigma’s volume data is saved using the same dB law as the selected DAW track volume data so that the ‘Paste Special’ command can be used to copy existing DAW fader data into the plugin.
Moving on from δ-Ctrl, the Sigma Remote Control Application offers full control of all Sigma functions plus store and recall of saved settings. It runs on Mac, PC or tablet devices and connects to a workstation via Ethernet (or wirelessly from a tablet). The user interface’s three main screens provide control and setup of the Master Section, Channel Control and Global Settings parameters. SSL states that every parameter can be saved for future recall.
The final addition sees the introduction of MCU control of Sigma. This facilitates direct control over the Sigma analogue mix path and monitor switcher from SSL’s Nucleus DAW controller or any other Ethernet equipped MCU enabled hardware control surface. Sigma’s MCU control reportedly requires no DAW software to be active, no app to be open or for a PC to be running. It requires a 16-fader MCU-compliant surface to be connected via a network cable to the same DHCP server or router that Sigma is connected to. Nucleus/Sigma becomes a 32 into four automated line mixer, with full monitoring and talkback capabilities.
Sigma can also be used in combination with Duality, AWS and Matrix. Inserting Sigma δelta across the insert points of an XL desk reportedly adds automation to the console.
Staying with the theme of Greek letters, SSL has also unveiled its βeta 500 format module Hardware Development Kit. Aimed at ‘build your own’ audio electronics enthusiasts, βeta offers a self-illuminating Perspex front panel with a collection of components that are identical to those used in SSL’s large format consoles. The kit includes five log, antilog and linear pots (including centre detent versions) with SSL’s signature knob caps, a selection of two and four pole switches and dual colour status LED’s. The components mount within the front panel in a fixed configuration but are freely assignable to any function. The panel and controls attach to a blue solderable breadboard with a 500 format edge connector and is supplied with resettable fuses.