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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: Looks like a mini version of mine.... posted by Dawnrazor on July 13, 2012 at 21:45:22:
The comments below speak to using multiple DACs in digital crossover applications. With multiple DACs there is a possibility that the time delay out of the separate DACs may differ.
If there is a fixed delay through the different channels, you will be able to see that by capturing the output, e.g. by using a measurement microphone. If the software crossover has delay compensation because it is working on impulse response then there will be no problem, no matter how the delays work out so long as they are consistent, because the delay compensation in the digital crossover can be adjusted appropriately.
If there are variable delays, then all bets are off. It is possible that the delays might vary from time to time or might be different each time the system is powered up. (I am not saying it is likely, but it does seem possible, at least with some software and hardware.) If this happens then the sound will be incorrect, ranging from imperceptibly degraded to absurd. Therefore I suggest that running some tests to verify that this isn't happening, e.g. measure the impulse response at the listening position from time to time during a long session and measure the impulse response at power up for a number of days. Of course, this paranoia won't be necessary if there is consistently consistently good sound. :-)
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: Looks like a mini version of mine.... - Tony Lauck 09:54:07 07/14/12 (7)
- RE: Looks like a mini version of mine.... - Dynobot 10:11:38 07/14/12 (6)
- RE: Looks like a mini version of mine.... - Tony Lauck 10:51:56 07/14/12 (5)
- RE: Looks like a mini version of mine.... - Dawnrazor 09:48:53 07/15/12 (4)
- Good to Go, but watch out for Murphy's Law - Tony Lauck 11:02:43 07/15/12 (1)
- RE: Good to Go, but watch out for Murphy's Law - Dawnrazor 12:10:16 07/15/12 (0)
- Something else you might consider - Dynobot 10:08:24 07/15/12 (1)
- RE: Something else you might consider - Dawnrazor 12:04:35 07/15/12 (0)
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