Deep Abyss Audio(9) The Answer to UAC: Why PopoDAC Chooses UAC1.0 Feedback

Hello again.This is Episode 9.Last time I said “next episode will finally reach ...

Deep Abyss Audio (8) CCC Core: Pro‑Audio Spec PopoDAC (USB DAC) DIY

Hello again. Welcome to Episode 8 — the long‑awaited chapter on the DDC Central ...

Deep Abyss Audio (7) PopoDAC DIY — DDC Design Philosophy

Happy New Year.Right at the beginning of 2026, we have finally arrived at Episod...

Deep Abyss Audio (6) Building the DDC Buffer: DIY Pro‑Audio PopoDAC (USB DAC)

Hello.This is Episode 6, where we build the DDC buffer.Up to the previous episod...

Deep Abyss Audio (5) Mounting the UAC Engine: Building a Pro‑Audio‑Grade USB DAC with the ESP32‑S3 Core

Hello again.Welcome to Episode 5.Today we’re finally installing the USB (UAC) en...

Deep Abyss Audio (4) Installing the I2S Tachometer: Building a Pro‑Audio USB DAC with an ESP32‑S3 Core

Hello again.In this fourth chapter, we attach a tachometer to the I2S engine—tur...

Deep Abyss Audio (3) – Spinning up the I2S engine Building a Pro Audio–grade USB DAC on ESP32‑S3

Hello again—third article already. This time I’m starting from the output side: ...

Deep Abyss Audio (2) DDC Architecture and MCLK Design: Building a Pro‑Audio USB DAC with an ESP32‑S3 Core (DIY)

Hello again.In Part 2, we will design the USB‑DDC (the “copy‑MOS” section) and t...

Deep Abyss Audio (1) Design & Specs: Building a Pro‑Audio USB DAC with an ESP32‑S3 Core (DIY)

Good evening. Starting today, we dive into the world of hand‑built USB DACs.As y...

【深淵オーディオ】アンプ自作 アンプの周波数特性を比較する

今回は、自作VUメーターを使ってアンプの周波数特性を収集し、比較を行います。 比較検証するアンプは3つ。 DENON社PMA-39033,000円（当時...