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Scarlatti Master Clock

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Clocking is vital in a digital audio source because any timing errors that occur in the DAC will be converted directly into errors in the analogue output. dCS DACs can act as the system master clock, but listening tests have shown that there is no substitute for a high-quality, dedicated master clock.

Used as part of the Scarlatti digital audio playback system, Scarlatti Master Clock improves on an already spectacular sound and takes it into an entirely new domain. Added to a dCS system, images snap into sharper focus and the music displays a substantially greater sense of authority and power as well as noticeably higher resolution of detail.

Scarlatti Master Clock is based on our professional studio master clocks and the highly successful Verona clock. All dCS Master Clocks are subjected to rigorous in-house testing and the crystal oscillators are pre-aged as well as being selected for long term stability.

Scarlatti Master Clock now features an asynchronous USB input which allows high resolution audio to be played from a computer. In this mode the Master Clock synchronises the audio by providing a feedback pipe to the PC or Mac. The computer’s audio stream is effectively clocked by the Master Clock, for dramatically lower jitter. Clock frequency is automatically switched to suit the incoming audio stream, resulting in extremely accurate performance.

dCS equipment is designed to generate and accept industry-standard Word Clock on 75 ohm coaxial cable. Other manufacturers’ equipment designed to accept standard Word Clock can be used with our clocks. Non-standard clock formats must be assumed to be proprietary to that manufacturer.

All Scarlatti products benefit from our ‘soft’ approach to programmable logic that allows new software to be loaded from a dCS update disc to add new features and adapt to changes in digital formats.

Key Features

  • A powerful yet simple to use Grade 1 master clock with additional USB-S/PDIF conversion based on our pioneering developments in studio and home audio. Featuring six Word Clock outputs and two S/PDIF outputs for transmitting high resolution audio up to 24-bit, 192ks/S.
  • All dCS products use a sophisticated multi-mode Phase-Locked-Loop (PLL), which significantly reduces clock jitter.
  • Improved power supplies give lower running temperature and superior tolerance to AC supply variations.
  • Aerospace-grade aluminium chassis and laminated acoustic damping panels reduce magnetic effects and vibration.
  • Low-power LC display makes the user interface easier to read, keeps power requirements down and minimises electrical noise.
  • ‘Soft’ approach to programmable logic allows new software to be loaded from a dCS update CD to add new features and adapt to changes in digital formats.


Technical Specifications

  • type

    Class 1 Master Clock.

  • clock frequencies

    44.1, 48, 88.2 & 96kHz.

  • colour

    Silver or Black.

  • dimensions

    465mm/18.3” x 405mm/16.0” x 75mm/3.0”. Allow extra depth for cable connectors

  • weight


  • clock accuracy

    Better than +/-1ppm when shipped (guaranteed for 12 months from shipping). Typically +/-0.1ppm when shipped and stabilised.

  • digital inputs

    External Reference Input on 1x 75Ω BNC connector. Accepts Word Clock (with the Coupling menu page set to TTL) or AC coupled signals (with the Coupling menu page set to Bipolar) at 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 1MHz, 5MHz & 10MHz. Lock range is +/-300ppm.
    1 x USB 2.0 interface on Type B connector. Accepts uncompressed audio data at 32, 44.1, 48, 88.2, 96, 176.4 & 192kS/s plus DOP.

  • digital outputs

    6x Word Clock outputs, independently buffered, may be set to 44.1, 48, 88.2 or 96kHz*. 2x SPDIF on 1x RCA Phono and 1x BNC, carry data from the USB input.

  • startup time

    Typically 1 minute to rated accuracy.

  • operating systems

    Tested on Windows XP/Vista/7 and Mac OSX. Operates in “Audio Class” mode. Class 1 mode (limited to 96kS/s) is available and does not require special drivers to be installed. Class 2 mode requires the dCS drivers (supplied) to be installed on Windows PCs. Not required on OSX 10.6.3 or later.

  • file formats

    Packetised PCM at 32, 44.1, 48, 88.2, 176.4 & 192kS/s.

  • software updates

    Loaded from CD via Reference Input or PC via USB input.

  • local control

    Nevo Q50™ programmable remote control is supplied with the Transport, or RS232.

  • power supply

    Factory set for 100, 115, 220 or 230V AC, 49-62Hz.

  • power consumption

    8 Watts typical/12 Watts maximum


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    dCS Scarlatti: The World’s Finest, Most Complex & Best Sounding SACD Player Yet

    Stereophile Vol.32 No.8, August 2009

    Review by Michael Fremer

    Read the review

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    Digital Record Players – dCS Scarlatti Digital Playback System

    The Absolute Sound Issue 183, July 2008

    Review by Jonathan Valin



This is the support section introduction for dCS Scarlatti Digital Playback System.  If you cannot find what you need please try the Support section or Contact Us.

  • Windows USB Class 2 Driver 2018

    Compatible with Windows 10 / 8.1 / 7.

  • dCS Scarlatti-Pronto RU960 Remote Config 2v10

  • dCS Scarlatti-Pronto TSU3500 Remote Config 2v10

  • dCS Scarlatti-Pronto TSU9400 Remote Config 2v10

  • dCS Scarlatti-Nevo S70 Remote Config 2v20

  • dCS Scarlatti-Nevo Q50 Remote Config 2v30

  • Quick Start Guide – dCS Scarlatti Digital Playback System

  • Product Datasheet – Scarlatti CD/SACD Transport

  • Product Datasheet – Scarlatti Master Clock

  • Product Datasheet – Scarlatti Upsampler

  • Product Datasheet – Scarlatti DAC

  • User Manual – Scarlatti CD/SACD Transport v1.1x

  • User Manual – Scarlatti Master Clock

    Software v2.0x. This applies to units with serial numbers starting with SCP.

  • User Manual – Scarlatti Upsampler v1.2x

  • User Manual – Scarlatti DAC v1.3x

  • Remote Control Codes

    Last updated 11 Feb 2016.



    • The Absolute Sound – Editor’s Choice 2014

      Stereophile – Digital Source of the Year 2009

      Dec 2009

    • The Absolute Sound – Editor’s Choice 2014

      Absolute Sound – Product of the Year 2008

      Dec 2008

    • The Absolute Sound – Editor’s Choice 2014

      Stereo Sound Japan – Grand Prix 2007

      Dec 2007