From 909fa57b2756ac82c2e1f540a00ecc9e8bc73955 Mon Sep 17 00:00:00 2001 From: Thomas Harte Date: Fri, 14 Nov 2025 13:29:15 -0500 Subject: [PATCH] Record references for the SID and biquad filter. --- Components/SID/SID.cpp | 6 ++++++ SignalProcessing/BiquadFilter.hpp | 3 ++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/Components/SID/SID.cpp b/Components/SID/SID.cpp index eb238af1e..ec4dd9e2f 100644 --- a/Components/SID/SID.cpp +++ b/Components/SID/SID.cpp @@ -8,6 +8,12 @@ #include "SID.hpp" +// Sources used: +// +// (1) SID Article v0.2 at https://github.com/ImreOlajos/SID-Article +// (2) Technical SID Information/Software stuff at http://www.sidmusic.org/sid/sidtech2.html +// (3) SID 6581/8580 (Sound Interface Device) reference at https://oxyron.de/html/registers_sid.html + using namespace MOS::SID; SID::SID(Concurrency::AsyncTaskQueue &audio_queue) : diff --git a/SignalProcessing/BiquadFilter.hpp b/SignalProcessing/BiquadFilter.hpp index 931837849..e4ae13c02 100644 --- a/SignalProcessing/BiquadFilter.hpp +++ b/SignalProcessing/BiquadFilter.hpp @@ -22,7 +22,8 @@ namespace SignalProcessing { It is used quite often in real designs, hence an implementation of this filter specifically. - (And the below is largely textbook; I can't claim any great knowledge) + ... and the below is largely textbook; I can't claim any great knowledge. I am especially indebted to + the W3C Group's audio EQ cookbook at https://www.w3.org/TR/audio-eq-cookbook/ . */ class BiquadFilter { public: