|
Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
|
|
|
Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
|
In Reply to: RE: About depth of field posted by unclestu on May 8, 2015 at 11:23:42:
"Boosting the highs then rolling them off at the end."
Back in my day we called that: Preemphasis.
And as I'm sure you know, it's included as part of the Red-Book standard. However unlike records and tape and FM it's use is unfortunately optional as is the implementation of the de-emphasis filter (I think). I've often wondered if it had been manditory and the the de-emphasis filter forced to be in the analog domain at the get-go if most of the whinging about digital would never have happened.
The signals that make music seem live are subtle in both the time and amplitude domains and can easily get lost in the shuffle. On top of that boosting the HF's would have provided more jitter for the lower frequencies helping the effective resolution of the early converters.
A bad (or misused) standard can cause decades of grief. One that was the source of much frustration was RS-232. Of course it didn't help that it was only aimed at modems but ended up being used for about everything.
My DAC, an ancient EAD, does sense the preemphasis bit and switches in (with a comforting relay click) real hardware deemphasis after the converter. Seems like your's is also creating the emphasis. Yes, it leaves out more of the chain but the grief always comes at the conversions so at least the final one should be improved.
Regards, Rick
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: About depth of field - rick_m 08:48:25 05/09/15 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]