Critic's Corner Discuss a review. Provide constructive feedback. Talk to the industry.

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Critic's Corner ]

---

[ Alert Moderator ]

---

RE: MQA Enabled ADCs

Posted by John Atkinson (R) on November 1, 2016 at 09:29:45

In Reply to: RE: Hey JimiAustin: MQA Enabled ADCs posted by 13th Duke of Wymbourne on October 31, 2016 at 18:09:21:

>An ADC is still an ADC. The answer in the linked interview does not state
>there is anything special about the ADC function for MQA except 'low
>modulation noise', i.e. it should be a good ADC.

There are 2 strategies for designing an ADC with a very short impulse
response of the type desired by the MQA system. One is to use a true DSD
converter running at 128Fs or higher with a first-order low-pass
antialiasing filter set well above the desired passband. The other is to do
what Ayre has done in its QA-9 converter at 192kHz, where it uses a
moving-average low-pass filter, of the type described by Keith Howard at
the article linked below.

John Atkinson
Technical Editor, Stereophile

• http://www.stereophile.com/reference/104law/index.html   (Open in New Window)

This post is made possible by the generous support of people like you and our sponsors:

VH Audio

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---