Professional Products

L-ISA PROCESSOR multichannel audio core

Combining a powerful multi-core architecture with a compact form factor, the L-ISA Processor is the audio heart of each L-ISA system. For extreme reliability, the L-ISA Processor focuses solely on spatial audio processing, offering panning and room simulation for up to 96 audio objects based on speaker positioning information and mixing parameters (pan, width, distance, elevation, aux send) and creating direct speaker feeds to L Acoustics amplified controllers. The high-resolution DSP engine is fully compatible with 96 kHz sampling rate and performs 32 bits floating point operations with low input-to-output latency (<5 ms). The L-ISA processor is remotely and uniquely controlled by the L-ISA Controller.

96 x 32 audio engine

The multi-core DSP engine features 32bit floating point processing with a sampling rate of up to 96kHz. It offers real-time control of pan, width, distance per input, parametric speaker setups up to 32 outputs, IRCAM room simulation engine for distance effect, including automatic mono, stereo and LCR downmixes, and remote i/o level-monitoring, all with an input-to-output delay of less than <5ms.


  • Height: 88 mm / 3.5 in (2U)
  • Length: 482 mm / 19 in
  • Depth: 350 mm / 13.8 in
  • Net weight: 8.9 kg
  • Finish: black
  • Protection class: IP 20


  • Audio inputs for 44.1 and 48 kHz sampling rates
  • MADI optical 1: inputs 1 to 64
  • MADI optical 2: inputs 65 to 96
  • Audio inputs for 96 kHz sampling rates
  • MADI optical 1: inputs 1 to 32
  • MADI optical 2: inputs 33 to 64
  • MADI BNC: inputs 65 to 96
  • Audio outputs
  • MADI optical 1 / optical 2 / BNC: redundant outputs 1-32
  • 1x stereo analog (6.3mm TRS), automatic downmix 1x stereo AES/EBU (XLR), automatic downmix
  • Sync sources
  • Word clock in (BNC)
  • MADI optical in (1, 2) / BNC in (3)
  • Network
  • 1x Ethernet port (RJ45) for remote control and monitoring from L-ISA Controller
  1. Power switch
  2. Status LED
  3. Fan grill
  4. Mains switch
  1. IEC mains inlet
  2. RJ45 ethernet connector
  3. MADI 1 i/o (optical)
  4. MADI 2 i/o (optical)
  1. Stereo analog out (6.3 mm TRS)
  2. Stereo AES/EBU out (brakout XLR)
  3. MADI 3 i/o (BNC)
  4. Word clock in i/0 (BNC)


The L-ISA Controller is the central communication interface of an L-ISA professional installation. It offers, on a single screen, a visualization of all sound objects in the 3D mixing space for live monitoring and user interaction in Windows and Mac OS environments.

The L-ISA Controller gathers communication from other interfaces (L-ISA plugins, trackers/sensors from Open Sound Control messages, mixing desk…) and provides an advanced priority mechanism to allocate control of selected parameters (pan, width, distance, elevation, aux send) for each object. In order to minimize the flow of control parameters and maximize reliability, it is the only communication link to the L-ISA Processor.

The L-ISA Controller configuration is saved in a session file that comprises all configuration settings, including grouping information, snapshots, reverb settings, naming of sources and groups and priority settings for external controllers.

The speaker configuration can be applied to an existing session without having to having to update any of the other parameters. It can be created directly into the L-ISA Controller or imported from a Soundvision file.

  • Windows 7+ / Mac OS X 10.10 +
  • Control up to 96 tracks (objects)
  • Speaker layout control
  • Integrated grouping features
  • Integrated snapshot features
  • Automation via companion VST / AAX plugin
  • External control via OSC

L-ISA source control plugin

The L-ISA Source Control Plugin offers seamless integration with the automation features of all major digital audio workstations, such as Avid Pro Tools, Steinberg Nuendo or Ableton Live and is available as a VST and AAX plugin for Windows and Mac OS.

The L-ISA mixing parameters (pan, width, distance, elevation, aux send) are available as automation data in the timeline of the workstation. Parameters can be directly edited in the timeline or stored during playback from direct user interaction on the L-ISA Controller.

The L-ISA Source Control Plugin automatically connects with the L-ISA Controller over the network, allowing the Controller and the Source Control Plugin to reside on different machines for practicality without requiring complex configuration.