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Bi-directional high performance audio format converter for AES3, AES3id and S/P-DIF signals


The MUTEC MC-1.1+ is a unique piece of equipment to help you to convert problem-free between the most popular digital audio formats and interface standards: AES3 and S/P-DIF. Due to lots of operations modes, we are sure that the MC-1.1+ will cover also your conversion needs between these two formats.

  • AES/EBU, AES/EBUid and S/P-DIF optical/coaxial interfaces in one box
  • Uni- and bi-directional format conversions up to 192.0 kHz between AES3/AES3id and S/P-DIF
  • Signal improvement and stabilization by low-jitter PLLs
  • Converts to all output formats simultaneously while allowing the original signal to pass through
  • Works as active signal splitter for AES3/AES3id and S/P-DIF
  • Every interface standard offers two separately buffered outputs
  • Detects NONE-PCM and DTS bitstreams
  • SCMS processing and status analysing
  • User‘s settings will be stored after switching-off
  • New-designed, simple user interface
  • Rack-space-saving 9.5“ housing
  • Built-in, internationally useable power supply


High-Performance Audio Conversions in all Respects

Due to the increasing number of devices with AES/EBU or AES/EBUid and S/P-DIF interfaces found in every studio environment, often a problem of different transmission formats and interface standards occurs mostly when those devices should exchange their digital audio data. At this point the MC-1.1+ comes in and helps you to convert problem-free between the most popular digital audio formats and interface standards: AES3 and S/P-DIF. Using latest low-jitter audio PLLs and a low-noise PCB circuit design, the MC-1.1+ not only converts, but also regenerates and improves your digital audio signal with clock rates up to 192.0 kHz. Thereby, the format conversion process does not only the necessary electrical conversion but also a real format conversion of the reference signals in compliance with the specifications standardized by the Audio Engineering Society (AES) and the International Electrotechnical Commission (IEC). This feature truly helps you to avoid incompatibility problems of the used signal formats between the connected devices during conversion. Thus, you can rely on professional conversions with help of the MC-1.1+ in all respects!

Outstanding Flexibility

Various operation modes enable the use of the MC-1.1+ in many applications. Nearly every imaginable conversion between the involved formats is possible! Incoming digital audio signals are uni-directionally converted to four output formats at once, whereas every format offers two outputs for additional signal splittings. As for bidirectional format conversions, the MC-1.1+ provides real double circuitries which allow for the first time converting the formats of two signals even with different sampling rates at the same time. A special splitting mode offers to actively split four individual input signals to their respective double outputs simultaneously. The SCMS status of S/P-DIF signals can be monitored and adapted in every operations mode. Thus, the MC-1.1+ offers highest flexibility to solve interconnections problems in your studio very easy and reliable!


  • Interconnection of consumer and professional digital audio devices
  • Real-time bi-directional signal transfer and conversion between send/returns of digital mixing consoles and effect processors
  • Converts AES3 and S/P-DIF signals to Dolby devices using AES3id
  • Uni- or bi-directional interconnection of computer-based sound cards with professional digital audio equipment
  • AES3, AES3id and S/P-DIF signal splitting and distribution
  • Digital audio signal refreshing in long-distance applications
  • SCMS coding of digial audio productions to protect those against illegal copying
  • S/P-DIF optical/coaxial status analysing

Technical Data


  • 1 x XLR input for AES3/11, 110 ohms terminated, transformer balanced
  • 1 x BNC input for AES3/11id, 75 ohms terminated, unbalanced
  • 1 x Optical input for S/P-DIF, Toshiba Toslink™, EIAJ RC-5720
  • 1 x Cinch input (coaxial) for S/P-DIF, 75 ohms terminated, unbalanced
  • 2 x XLR output for AES3/11, terminated, transformer balanced, buffered
  • 2 x BNC outputs for AES3/11id, terminated, unbalanced, individually buffered
  • 2 x Cinch (coaxial) output for S/P-DIF, terminated, unbalanced, buffered
  • 2 x Optical output for S/P-DIF, Toshiba Toslink™, EIAJ RC-5720

All inputs and outputs work between 32.0 kHz and 192.0 kHz.

Signal Processing

  • Digital audio format conversion between AES3, AES3id, S/P-DIF (optical + coaxial) in every combination and direction
  • Signal regeneration and stabilization
  • SCMS copy bit generation of original and 1st generation incl. SCMS pass-thru functionality
  • S/P-DIF signal analyzing with automatic detection of SCMS original + 1st generation status; none-PCM and DTS detection
  • Operating temperature: 0 °C to +50 °C

Power Supply

  • Type: Internal switching power supply
  • Input Voltage: 90 V – 260 V (automatic adjustment), 47 Hz – 440 Hz
  • Power Consumption: max. 10 W

Mechanical Details

  • Cover size/material/color: 196 x 42 x 156 mm without connectors (W x H x D), 1 mm aluminium sheet 1 mm, black powder-coated
  • Front panel size/material/surface: 198 x 44 x 2 mm (W x H x D), aluminium, powder-coated
  • Weight: approx. 650 g