Popular Post mansr Posted January 3, 2020 Popular Post Share Posted January 3, 2020 4 hours ago, marce said: I presume by high end you mean something above a price point... Since the other category is "value," I assume "high end" here means overpriced. AudioDoctor, Samuel T Cogley, sandyk and 8 others 1 3 6 1 Link to comment
mansr Posted January 8, 2020 Share Posted January 8, 2020 4 minutes ago, Richard Dale said: As far as I know the Chord DACs use a very high end delta-sigma type of conversion implemented in FPGAs Right. They just call it something else to confuse people like George. Ran 1 Link to comment
mansr Posted January 8, 2020 Share Posted January 8, 2020 42 minutes ago, Ralf11 said: I see people talk about a "hump" in the ESS chips. What is that really? It's a slight increase in IMD at moderate signal levels. Weird, but not audible. Some manufacturers, such as Benchmark, have found ways to avoid it. Ralf11 1 Link to comment
Popular Post mansr Posted January 9, 2020 Popular Post Share Posted January 9, 2020 10 hours ago, gmgraves said: I spoke, briefly with a Chord representative at a Hi-Fi show a few years ago, he assured me that the Chord Dave and Hugo2 DACs were not based on delta-sigma architecture but on a proprietary multi-bit scheme. He seemed to be quite technical, and knew what he was talking about. If he was wrong, I have no way of ascertaining it. Can you elaborate? Look at what they say themselves (https://chordelectronics.co.uk/wp-content/uploads/2016/08/DAC-64-Information-Sheet.pdf): Quote Pulse Array as a DAC technology has been universally praised for its outstanding natural sound quality. The fourth generation builds on this success; it employs 64 bit 7th order noise shaping, 2048 times oversampling rates and improved pulse width modulated elements. Or this (https://chordelectronics.co.uk/wp-content/uploads/2016/09/DAVE-Technology-Presentation.pptx): They go to great pains to avoid saying delta-sigma, yet that is exactly what this is. 10 hours ago, gmgraves said: Of course, as I said earlier, it could be that delta-sigma technology is capable of very high levels of performance, just not in single-chip monolithic form as made by semiconductor companies such as ESS, Texas Instrument (Burr-Brown), Analog Devices, etc. Delta-sigma modulation is just maths, and its performance is easy enough to determine by all-digital means. The only limitation is the amount of computational power (number of gates) you're willing to throw at it. Now more gates means a bigger, more expensive chip and higher power consumption, so going to extremes here is simply wasteful if the overall performance is anyway limited by the analogue parts. There is no reason the guts of a Chord DAC couldn't be made into a chip. There's just not enough of a market for such a device to make it commercially interesting. Superdad and semente 2 Link to comment
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