Linear Acoustic® quality with the right features at the right price

Introducing Linear Acoustic ARC (Automatic Realtime Control), our next-generation television loudness processor featuring our state-of-the-art APTO® loudness adaptation algorithm.

The 1RU ARC processes two 2-channel stereo or mono programs and is designed for simple setup. Specify a target output loudness value, choose a processing profile, and walk away knowing your station is in compliance with all global loudness standards and recommendations, including EBU R128 and ATSC A/85.

ARC is ideally suited to regions and applications where multi-channel audio is not supported or required, and which require straightforward stereo loudness processing without the need for coded audio, audience measurement watermarking, external audio insertion, or many of the other advanced features found in our AERO-series processors.

Broadcasters on a budget no longer have to compromise between audio quality and affordability, as ARC delivers the viewer-pleasing audio for which Linear Acoustic has become famous, but at a very approachable price point.

ARC supports two independent audio programs via AES, SDI, and AES67 I/O, making it fully compliant with SMPTE ST 2110.

Its easy-to-use web-based user interface ensures a simplified remote experience on any device, browser, or OS. Loudness logging for each program is included for compliance verification as a .csv file.



  • Linear Acoustic® APTO® Loudness Adaption technology. Processing for two stereo or mono programs. Downmixing of 5.1 content prior to processing on first program.

Sample Rate/Resolution/Frequency Response

  • 48kHz, 24-bit, 20Hz to 20kHz below threshold


  • One 2-channel input and one 2-channel output via 75 Ohm BNC female connectors, internally terminated; signal levels per SMPTE 276M/AES-3ID-200


  • One auto-sensing 3Gb/s HD/SD-SDI (SMPTE ST425/292M/259M) input and one output via 75 Ohm BNC female connectors, internally terminated; video formats up to 1080i/60/59.94/50Hz

AoIP (Audio Over IP)

  • 16-channels of bi-directional AES67 audio via dedicated RJ-45 Ethernet port

Parallel GPI/O Control Port

  • 15-pin female D connector, 0-5V TTL levels for 5 inputs and 5 outputs; GPI controls for loudness measurement start/stop/reset, loudness logging start/stop/reset, and preset recall for each audio engine, plus system configuration recall. GPO controls for loudness above/below target, loudness within target window, loudness measurement reset, logging on/off, reference change, and loss of reference.

Ethernet Connections

  • Two Gigabit Ethernet ports support; one for AoIP connections, one for remote control and monitoring via web interface


  • SNMP support standard; traps include loudness above/below target, loudness within target window, change in reference, and power supply status.

Front Panel Controls and Indicators 

  • 5-key navigation cluster; graphical color LCD display; LED status indicators for each power supply and reference


  • Dual, redundant, internal auto-sensing power supplies, each rated at 100-264VAC, 50/60 Hz, 40 Watts maximum

Dimensions and Weight

  • 1RU high; 1.75”H x 19”W x 9”D (44 x 483 x 229 mm); approximate net weight - 9 lbs (4 kg); approximate shipping weight - 12 lbs (5.4 kg)


  • Operating range: 0 to 50 degrees C (32 to 122 degrees F); non-operating range: -20 to 70 degrees C (-4 to 158 degrees F)


  • NORTH AMERICA: FCC and CE tested and compliant, power supplies are UL tested and approved.

  • EUROPE: Complies with the European Union Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS), as amended by Commission Decisions 2005/618/EC, 2005/717/EC, 2005/747/EC (RoHS Directive), and WEEE.


  • Standard 2-year limited parts and labor