From 8d28bde119b79f487ef9d9fd0ffd9932d89c7404 Mon Sep 17 00:00:00 2001
From: minjaesong <alswo9628@gmail.com>
Date: Thu, 23 Apr 2026 23:11:09 +0900
Subject: [PATCH] taud base note def changed (A3@440Hz)

---
 assets/disk0/tvdos/bin/taut.js      | 3 +++
 assets/disk0/tvdos/include/taud.mjs | 4 ++--
 s3m2taud.py                         | 2 +-
 terranmon.txt                       | 4 ++--
 4 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/assets/disk0/tvdos/bin/taut.js b/assets/disk0/tvdos/bin/taut.js
index b7e3374..684a744 100644
--- a/assets/disk0/tvdos/bin/taut.js
+++ b/assets/disk0/tvdos/bin/taut.js
@@ -10,6 +10,9 @@ const taud = require("taud")
 
 font.setHighRom("A:/tvdos/bin/tautfont_high.chr")
 
+const BUILD_DATE = "260423"
+const TRACKER_SIGNATURE = "TsvmTaut"+BUILD_DATE // 14-byte string
+
 const MIDDOT = "\u00FA"
 const BIGDOT = "\u00F9"
 const BULLET = "\u00847u"
diff --git a/assets/disk0/tvdos/include/taud.mjs b/assets/disk0/tvdos/include/taud.mjs
index 83a0817..98504f1 100644
--- a/assets/disk0/tvdos/include/taud.mjs
+++ b/assets/disk0/tvdos/include/taud.mjs
@@ -219,8 +219,8 @@ function captureTrackerDataToFile(outFile) {
         numPats & 0xFF, (numPats >>> 8) & 0xFF, // numPatterns Uint16 LE
         bpmStored,                             // BPM with −24 bias
         tickRate,                              // initial tick-rate
-        0x40,0,      // basenote
-        0x13,0xd0,0x82,0x43, // basefreq
+        0x00,0x4C,              // basenote (0x4C00 -- A3)
+        0x00,0x00,0xDC,0x43, // basefreq (440 Hz)
         0,        // padding
     ]
 
diff --git a/s3m2taud.py b/s3m2taud.py
index fc056c7..527b740 100644
--- a/s3m2taud.py
+++ b/s3m2taud.py
@@ -904,7 +904,7 @@ def assemble_taud(h: S3MHeader, instruments: list, patterns: list) -> bytes:
         num_taud_pats_hi,
         bpm_stored,
         speed,
-    ) + b'\x40\x00' + b'\x13\xd0\x82\x43' + b'\x00'
+    ) + b'\x00\x4C' + b'\x00\x00\xDC\x43' + b'\x00'
     assert len(song_table) == TAUD_SONG_ENTRY
 
     # Cue sheet (using remapped pattern indices)
diff --git a/terranmon.txt b/terranmon.txt
index 603aad4..095a22f 100644
--- a/terranmon.txt
+++ b/terranmon.txt
@@ -2210,8 +2210,8 @@ Rows of 16 bytes:
     Uint16  Number of patterns (0 is invalid. pattern bin length = numPats * 8 bytes)
     Uint8   Initial BPM (bias of -24. 0x00=24, 0xFF=279)
     Uint8   Initial Tickrate (0 is invalid)
-    Uint16  Current Tuning base note (1..65533), assuming octave 3. C3 (the default value) is 0x4000. If zero, assume the default value
-    Float32 Frequency at the base note. Default (A440) is 261.6255653. If zero, assume the default value
+    Uint16  Current Tuning base note (1..65533). A3 (the default value) is 0x4C00. If zero, assume the default value
+    Float32 Frequency at the base note. Default (A440) is 440.0. If zero, assume the default value
     Byte[1] Reserved for future versions
 
 Taud device can queue up to 2 "playdata" in its buffer, which can be interpreted as a song.