RME Audio | ADI-2/4 Pro SE: Digital Phono Preamp (RIAA Mode) Explained @RMEAudio | Uploaded August 2023 | Updated October 2024, 12 hours ago.
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, audiosciencereview.com

An independent review of the ADI-2/4 Pro SE RIAA functionality can be found here: audiosciencereview.com/forum/index.php?threads/rme-adi-2-4-pro-se-riaa-mode-measurements.39941

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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