ADI-2/4 Pro SE: Digital Phono Preamp (RIAA Mode) Explained
RME’s ADI-2/4 Pro SE comes with an unusual digital RIAA mode, removing the need to use an external phono preamp in front of the ADI-2/4’s line inputs. This video explains in detail how this new mode is designed, operates and measures.
This video includes measurements from Audio Science Review, https://www.audiosciencereview.com
An independent review of the ADI-2/4 Pro SE RIAA functionality can be found here: https://www.audiosciencereview.com/fo...
00:00 - Intro
00:25 - The ‚Analog’ RIAA Preamp
01:21 - RIAA Curve Explained
01:57 - Challenges for the Analog Preamp
02:47 - Turning the ADI into an RIAA Preamp
02:58 - ASP (Audio Signal Processor)
03:23 - Step 1: Impedance Matching
03:48 - Step 2: Noise from Line and ADC
04:51 - Step 3: Headroom
05:14 - Step 4: Optimization
05:46 - RIAA Mode Implementation Overview
06:54 - RIAA Mode Implementation in Detail
07:16 - RIAA Digital Processing in Detail
07:40 - Mono Bass
08:14 - Let’s Compare
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