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  1. Rob Watts

    Chord Mojo 2 Thread ___ [product released January 31, 2022 -- starting on page 95 of thread]

    Sure it will affect the timing of transients - if it's an IIR filter that has a phase (or time delay) that changes with frequency, like the filter I use in Mojo 2. But it's a linear change, and linear changes don't matter, as the delay is unvarying with amplitude or time. This is completely...
  2. Rob Watts

    Watts Up...?

    There are two issues here - low frequency master clock jitter where the frequency shifts over the millisecond to second range, and cycle to cycle master clock jitter, which is predominately HF jitter. The master clock is the clock that sets the switching for the analogue conversion. With low...
  3. Rob Watts

    Chord Mojo 2 Thread ___ [product released January 31, 2022 -- starting on page 95 of thread]

    On the earlier DACs I had HF filters switchable because they had a drop at 20kHz, which would make the measurement people complain if it was permanently engaged. But with the new DSP core, I could easily implement filters that had a fast HF roll-off but had no change within the audio bandwidth...
  4. Rob Watts

    Chord Mojo 2 Thread ___ [product released January 31, 2022 -- starting on page 95 of thread]

    Yes it has a HF filter permanently engaged - and it sounds much better that way. Audio bandwidth (20 to 20k) is flat with EQ off.
  5. Rob Watts

    CHORD ELECTRONICS DAVE

    So a transient is different to steady state - a steady state signal repeats but does not change in time, so an unvarying sine wave (or any other regular repeating signal) is steady state. Transient is when something changes that is not a regular repeating waveform; indeed one can think of music...
  6. Rob Watts

    Watts Up...?

    One key reason I engage with Head-Fi and attend CanJams is people are invariably polite. Politeness is about respect for fellow human beings - in short being considerate to other people. Consideration requires a level of humility, both personally and intellectually. And this means admitting that...
  7. Rob Watts

    CHORD ELECTRONICS DAVE

    1. I am free to do what I choose, as I am not under contract with Chord, and only receive payments once products enter production. So my choices on long term R&D are based on two things only - intellectual curiosity and the path that will give me the most musical rewards in the long term. In...
  8. Rob Watts

    CHORD ELECTRONICS DAVE

    My two cents - when I was in Munich demonstrating Quartet M scaler/Dave to the press, I had some extremely positive feedback from reviewers after they had listened to it. Also, a few users listened on the trade days - one who had recently sold his Dave. After listening to Quartet M scaler/Dave...
  9. Rob Watts

    The New Chord Quartet M Scaler Discussion Thread

    No the hardware has been fixed now. But you wouldn't be able to listen too it properly as pro monitors don't support 768kHz.
  10. Rob Watts

    The New Chord Quartet M Scaler Discussion Thread

    It already has this - the DSP EQ has 5 settings, off and 4 settings that can be user set.
  11. Rob Watts

    Hugo M Scaler by Chord Electronics - The Official Thread

    Most likely fourth quarter. But I still have much testing to do, and more features to implement, plus some more things I need to try to perhaps further improve performance. And then there is the time delay for Chord to get into full production.
  12. Rob Watts

    Hugo M Scaler by Chord Electronics - The Official Thread

    Hyper busy at the moment. Quartet M scaler will not be launched at Munich, but the prototype will be available to listen to on the trade days (Thus/Friday). On Saturday/Sunday you can see it, but the production version will be slightly different to the unit shown. I will be there on the...
  13. Rob Watts

    Watts Up...?

    I have been hyper busy over the last few weeks, so haven't had time to post, so apologies for that. I have been reluctant to reply to this as my reply could easily be considered as boasting or marketing BS. But adding Quartet into his system (one of which I have heard several times) was a huge...
  14. Rob Watts

    Watts Up...?

    Partially as I have an initial DAC prototype working. But that doesn't mean you need a new DAC to appreciate Quartet - recently I have been showing the pre-production Quartet to a few selected audiophiles via a Dave against an M scaled Dave, and the subjective results were very much better than...
  15. Rob Watts

    Hugo M Scaler by Chord Electronics - The Official Thread

    Any digital circuit can introduce RF noise. The issue here is how much, and this depends upon power - Toslink optical receivers have the lowest power consumption. By far the worst is USB, as this requires a processor to buffer and decode, and that creates two orders of magnitudes more random RF...
  16. Rob Watts

    Hugo M Scaler by Chord Electronics - The Official Thread

    I covered this aspect in recent NYC and Singapore CanJam seminars - here are the relevant slides: I think optical has a bad reputation because it sounds rich, warm and naturally rounded due to the reduction in noise floor modulation. This is a less impressive sound than the etched and forced...
  17. Rob Watts

    Watts Up...?

    Clearly the writer doesn't have a clue how sampling theory works - the diatribe is just mumbo-jumbo. To say that with more taps "they will end up blending to each other, keeping the "build-up" in between at higher level. Closer these are to each other, higher the build-up. In other words, these...
  18. Rob Watts

    Watts Up...?

    I would hesitate to put a number on the sound quality from the DAC as the analogue and PSU is indeed vital. But if pushed for a number, it would be very much more than 90% is dependent upon the interpolation filter and DAC implementation. The problem is so many listeners are not good at...
  19. Rob Watts

    Chord Mojo 2 Thread ___ [product released January 31, 2022 -- starting on page 95 of thread]

    It doesn't need 24 hours - that applies to Hugo 2. How long it needs depends upon the initial charge state, and the fact that the last charge (from 95% to 100%) is a tiny trickle charge and this can take a couple of hours alone. And because it's a trickle charge, it's uncertain when it will...
  20. Rob Watts

    Watts Up...?

    The new Quartet M scaler will have more complex and lossless EQ built in. Oddly enough, I am putting the finishing touches to it right now. Having EQ that does not mess up sound quality or musicality is a really useful tool.
  21. Rob Watts

    Watts Up...?

    Quartet's single BNC and optical OP is different to the Hugo M scaler - I decided to fix the OP at 176.4/192k as it then allowed for an optimised data path. All inputs are converted to 705.6/768 kHz, then the 176.4/192 is created by decimation from the common 705.6/768 kHz - but it's by no means...
  22. Rob Watts

    Watts Up...?

    Yes Quartet M scaler will have 176.4/192 kHz toslink OP, plus 176.4/192 kHz coax and of course dual BNC at 705.6/768 kHz. On another note, I will be posting my new seminar slides here after Singapore CanJam.
  23. Rob Watts

    Chord Mojo 2 Thread ___ [product released January 31, 2022 -- starting on page 95 of thread]

    I really welcome suggestions for EQ - but as @hypos said, you can't please everyone. The settings for the shelf and peak were determined so that one could compensate for a first order response for bass - a lot of Japanese IEMs have a first order roll-off at 125Hz, and with the appropriate bass...
  24. Rob Watts

    Watts Up...?

    Thank-you for your kind comments. Ah you spotted that! I occasionally add intentional little hints to my posts. Yes the base PSU design has some variants that will suit other future products - in particular the Ultima DAC.
  25. Rob Watts

    Chord Mojo 2 Thread ___ [product released January 31, 2022 -- starting on page 95 of thread]

    So long as it's not white it can't clip under any circumstances even with the max digital input of 0dBFS.
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