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In Reply to: S/N question posted by Daverz on August 5, 2011 at 08:19:25:
On some DACs, particularly some ladder DACs, there is low level distortion as well as noise. In addition, if the software doesn't do dithering that will cause there to be low level distortion and the sound will suddenly drop out.
On the other hand, some DACs lack headroom on loud material and will distort on intersample peaks that are over maximum. This is actually a design problem with the DAC but it happens with some DACs. This distortion can be prevented by a small amount of digital volume control reduction (typically less than 2 dB except on pathological material where it may be more).
So if you have both an analog volume control and a digital volume control the rule is, as always, experiment and select what sounds best to you. Just take care not to use too much analog gain so that you don't blow the speakers if "You've got mail!"
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- RE: S/N question - Tony Lauck 15:22:06 08/05/11 (0)
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