From 1790f743d65c6ea5e731e249d61e4d2a28a5a56d Mon Sep 17 00:00:00 2001
From: 3dtours <yeunhiepanh.photo@gmail.com>
Date: Fri, 31 Jul 2026 08:26:06 +0700
Subject: [PATCH] fix: add 400ms decay to MIDI noteoff for natural release

---
 app/static/js/services/soundfontPlayer.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/app/static/js/services/soundfontPlayer.js b/app/static/js/services/soundfontPlayer.js
index c904a54..015b750 100644
--- a/app/static/js/services/soundfontPlayer.js
+++ b/app/static/js/services/soundfontPlayer.js
@@ -436,6 +436,9 @@
                     if (!_activeNotes[noteMapKey]) _activeNotes[noteMapKey] = [];
                     if (_activeNotes[noteMapKey].indexOf(ch) === -1) _activeNotes[noteMapKey].push(ch);
                     if (durationMs > 0 && durationMs < 60000) {
+                        var releaseMs = 400;
+                        var totalDurMs = durationMs + releaseMs;
+                        if (totalDurMs > 60000) totalDurMs = 60000;
                         scheduledNote.off = setTimeout(function () {
                             try {
                                 _fluidModule._fluid_synth_noteoff(_synthPtr, ch, midiPitch);
@@ -446,7 +449,7 @@
                                     if (arr.length === 0) delete _activeNotes[noteMapKey];
                                 }
                             } catch (e) {}
-                        }, durSec * 1000);
+                        }, totalDurMs);
                     }
                 } catch (e) {
                     console.warn("[SonicSF] FluidSynth noteOn error:", e);