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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: RE: New DAC and CD Player search posted by morricab on June 20, 2016 at 09:22:14:
Hi, morricab,
In general, the following are my conclusions after experimenting with DACs of my own design. So, in no particular order:
1. The best sounding I/V circuit I've tried is a simple resistor. This vastly subjectively outperformed the typical op-amp based virtual ground I/V circuits I tried.
2. Power supply common-mode noise rejection makes an audible difference. Meaning, use of common-mode chokes.
3. Digital filtering, or a lack thereof, makes an very audible difference. This isn't to suggest that NOS conversion always sounds best, just that altering the digital filter implementation is very audible. In short, to my ears, NOS does indeed provide a stress free type of sound, yet it also has certain subjective artifacts such as a narrowing of the soundstage width relative to that with digital filtering - although, the soundstage is quite deep via NOS.
4. The analog output reconstruction filter capacitors adversely affect the sound unless they're implemented with care. I'm presently utilizing Wima FKP2 film & foil (not metallized film) units with satisfaction.
5. Regarding, straight multibit conversion versus sigma-delta conversion. I've seen the subjective reports of DSD producing a wispy sound character. While I can't speak about DSD, I've found that the sigma-delta based PCM1794A (a PCM, not a DSD converter) does not have a wispy should character. It produced a sound character every bit as solid sounding as the AD1865 straight multibit converter I've experimented with. I'm presently conducting on-going experiments around the PCM1794A converter.
_
Ken Newton
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Follow Ups
- RE: New DAC and CD Player search - knewton 07:58:12 06/22/16 (0)
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