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MQA –> dCS

  • The best DAC in the world? There’s no one-size-fits-all-answer but any shortlist would likely include something from Cambridge/shire’s dCS (Data Conversion Systems): the Debussy, the Rossini or the Vivaldi.

    Prices start at around eight and half – that’s audio show speak for £8500 – and move upwards from there, each with options for adding external upsampling disc transports, upsamplers or master clocks.

    DAR caught Raveen Bawa’s intro to the dCS product range at the 2016 Hong Kong High End show:

    For those who prefer a unibox solution, dCS’ 30th Anniversary model, the Vivaldi One, puts a hi-res Roon Ready network streamer, TEAC/Esoteric VRDS NEO SACD/CD disc spinner and proprietary Ring DAC™ under one roof for a cool £55K.

    dCS’ Ring DAC™ technology isn’t derived from off-the-shelf silicon but from in-house designed circuitry that oversamples all incoming data to 5-bit DSD.

    Now for the news: dCS have finalised arrangements with the neighbouring MQA (also based in Cambridgeshire) to add MQA compatibility to “all current product ranges”, including streamers. The firmware updates will roll out as follows:

    dCS Rossini – October 2017
    dCS Vivaldi One – November 2017
    dCS Network Bridge – November 2017
    dCS Vivaldi DAC & Upsampler – December 2017

    MQA’s proposition is that it not only 1) enables higher sample rates to be streamed using digital audio origami but 2) MQA’s pre-processing corrects for time domain errors in the master source file and 3) optimises the digital signal ahead of D/A conversion.

    Remember: an MQA decoder handles the unfolding of the hi-res content. The MQA renderer, which includes a decoder, optimises the digital signal in lieu of the ensuing D/A converting circuitry.

    Whilst some digital audiophiles are happy to receive MQA’s pre-processing and a software-powered first unfold free of charge, others want the fully MQA monty: the pre-processing, the complete hi-res unfold and DAC optimisation.

    For DAC manufacturers operating in 2017, the call to add full MQA rendering to their products is beginning to transcend the controversy surrounding the format. The high end audio world is littered with Format-First Audiophiles who now more than ever shop with a “No MQA, No Deal” approach, especially when it comes to big ticket items like those offered by dCS.

    Rightly or wrongly, this kind of consumer cares not for calls of further investigation into MQA’s encoding methods or MQA (the company’s) financial model.

    From the press release, David Steven, Managing Director of dCS, says, “The dCS and MQA teams have been in discussion, development and testing for almost a year. This is a unique and exciting implementation made possible by the flexibility and capability of our platform, as well as the fact that both companies have aligned philosophies, strong mutual respect and trust.”

    And MQA’s Bob Stuart adds, “In the case of the dCS Rossini, the MQA and dCS teams were able to work together to develop code which accurately matched the MQA hierarchical ideal reconstruction to analogue. This MQA implementation is unique as it is the first opportunity to enable a DAC which, by providing exact rendering to beyond 16x (768 kHz), matches the desired temporal response with very low modulation noise.”

    Interestingly, the press release also tries to move the conversation of hi-res audio away from the digital domain’s sample rates and bit depths and toward the analogue domain’s “temporal fine structure and lack of modulation noise”.

    Further information: dCS

    Written by John

    John currently lives in Berlin where he creates videos and podcasts for Darko.Audio. He has previously contributed to 6moons, TONEAudio, AudioStream and Stereophile.

    Darko.Audio is a member of EISA.

    Follow John on YouTube or Instagram

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