|
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: V90 DAC bass roll off posted by dave789 on July 23, 2015 at 20:39:24:
By internet search, I found an interesting frequency graphs.Cambridge Audio Dacmagic Plus uses "up sampling to 384kHz" (ASRC). Apple iPhone 5 does not advertise "up sampling."
The frequency response graph of Cambridge Audio Dacmagic Plus is far more wiggly than that of Apple iPhone 5.
From the 384kHz figure, I guess Cambridge Audio Dacmagic Plus uses in house ASRC resulting in more pass band ripple than off the shelf ASRC chips (usually used to upsample to 192kHz, not 384kHz).
P.S.: The passband ripple spec is +/- 0.008dB on Texas Instrument SRC4392. I do not know whether V90 DAC has this chip or some other ASRC chip. SRC4392 is an 24bit/192kHz chip not a 32bit/192kHz chip (Cirrus Logic 8421 is a 32bit/192kHz chip).
Edits: 07/24/15 07/24/15
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Does ASRC (upsampling) hurt pass band ripple in general? - dave789 05:03:31 07/24/15 (10)
- RE: Does ASRC (upsampling) hurt pass band ripple in general? - Dave_K 06:32:48 07/24/15 (9)
- RE: Does ASRC (upsampling) hurt pass band ripple in general? - dave789 06:55:05 07/24/15 (8)
- I'm not convinced ASRC is the culprit though - Dave_K 04:27:05 07/26/15 (6)
- passband ripple specs in +/- dB - dave789 06:56:42 07/26/15 (5)
- So? - Dave_K 10:03:35 07/26/15 (4)
- RE: So? - dave789 11:03:19 07/26/15 (3)
- Benchmark DAC1 has AD1896, and Cambridge DacMagic Plus has Anagram upsampler - Dave_K 11:31:49 07/26/15 (2)
- RE: Benchmark DAC1 has AD1896, and Cambridge DacMagic Plus has Anagram upsampler - dave789 20:09:24 07/26/15 (1)
- RE: Benchmark DAC1 has AD1896, and Cambridge DacMagic Plus has Anagram upsampler - Dave_K 02:28:36 07/27/15 (0)
- RE: Does ASRC (upsampling) hurt pass band ripple in general? - beautox 14:24:16 07/25/15 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
