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Abtr

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About Abtr

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  1. I had a similar issue with my Shiit EITR USB to S/PDIF converter. When I switched the mains light on, the USB connection was lost and I had to reset the unit to reconnect. Other members had the same issue. I replaced the light switch but the problem persisted. According to Mike Moffat from Shiit it had to be a problem with the mains wiring, but personally I think the USB chip used in the EITR is overly sensitive to the RF burst resulting from switching the light. I had the same problem with a SHIIT Modi 2 DAC which uses the same USB chip. I now use another DDC (and another DAC) without a probl
  2. Yeh, I know what you mean. I own a lot of audio equipment that didn't live up to expectations. But I can recommend the Topping.
  3. Well, @AudioDoctor tried various DACs and streamers that apparently all suffer from this *easily* and *immediately* audible difference between Tidal and Qobuz 'lossless' streaming. He also tried galvanic isolation to no avail. To be honest, I find this hard to believe. I think something else must be going on. These software clients are not that architecturally different and (as said) they use the same OS kernel functions to process USB streams. Anyway, in my system all electrical noise problems are solved by simply installing a decent USB to Toslink DDC before the DAC.
  4. So what you are saying is that the Tidal client software (app) may be audibly more noisy than the Qobuz client software (or vice versa). I seriously doubt that. The timing of the USB data packages (chunks) is standard 8 KHz and doesn’t vary. What varies is the amount of data per package, which is determined by the USB receiver of the DAC which requests more, or less data per package in case of buffer under, or overruns respectively. This is not determined by the server. Furthermore, with lossless streaming, the data is simply relayed. Both clients will not perform DSP and both Tida
  5. Are you suggesting that Tidal servers are more noisy than Qobuz servers (or vice versa) and that this noise audibly persists through multiple internet hops; typically 10 to 20 routers each regenerating the digital signal that ultimately goes into your streamer and DAC? If that was true then the cumulative noise of millions of servers would make any data transmission over the internet impossible.
  6. If you can easily hear a difference then, somehow, the bits sent to the DAC must be different..
  7. I know how USB works and I know the bits are bits discussion. I agree that bits are not just bits in this context. Streamer hardware (especially computers) can be very noisy and some of this electrical noise may audibly end up in the analog stage of a USB DAC. However, using *the exact same streamer and DAC*, I don’t think anyone can demonstrate that streaming bits from a Tidal server sounds different (or worse) than streaming the same bits from a Qobuz server. But again, this is off topic and has nothing to do with MQA.
  8. I agree that the Whathifi article is BS. And IMO there is no obvious way the exact same bits will result in different sound depending on whether they are streamed from a Qobuz, or a Tidal server, especially when they are buffered and reclocked by a modern USB DAC. But I agree to disagree. It's basically the old bits are bits discussion and as such it has nothing to do with MQA.
  9. Whathifi doesn't agree with you: https://www.whathifi.com/us/qobuz/review Anyway, apart from MQA and true high-res, which may sound different, there is no audible difference IME between Qobuz and Tidal when the same lossless redbook version of an album is streamed from either service using the same hardware. Are you sure you have exclusive mode and force volume checked and loudness normalisation unchecked in the Tidal client?
  10. You may try connecting 2 speakers in series per channel..
  11. Although sometimes the MAQ version of an album sounds better than the currently available redbook release, this seems to be because MQA uses e.g. an earlier redbook version (possibly the original release) as the basis for the MQA conversion. And sometimes there's no readily discernable audible difference between redbook and MQA, probably because the master is the same. Now here's an MQA album that sounds notably worse than the redbook version: Steely Dan, Gaucho. Both redbook and MQA versions are available on Tidal. The difference is night and day in my system. After playing the re
  12. Abtr

    GROUNDING

    Thanks for the PM. The only difference in my system is that USB GND is earthed through a 100K Ohm series resistor (not 100 Ohm) for optimal SQ..
  13. Abtr

    GROUNDING

    Yes, a static charge may be a problem when it is abruptly discharged (if that's what you mean), even when it is discharged to ground. That's what causes a USB disconnect in my system. But imagine a static charge that continuously builds up and continuously leaks current into a DAC or a DDC. Could that affect SQ? I think so. In my setup, touching USB GND causes an instantaneous static discharge which disconnects USB, whereas grounding USB GND through a 100K Ohm resistor prevents the static buildup and improves SQ. Just grounding USB GND without the series resistor audibly reduces SQ, probably b
  14. Abtr

    GROUNDING

    Any thoughts about how static charge may audibly affect sound quality?
  15. Abtr

    GROUNDING

    BTW, another remaining question is how common is the buildup of static charge in ungrounded (double isolated) audio equipment, especially in equipment for streaming computer audio over USB, and how may this audibly affect SQ (as it does in my system)?
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