From 5136127e39a77e43a4f9a197ac832a3bd6d4c5b63f21166fce09fb274f99881f Mon Sep 17 00:00:00 2001
From: copecone <controld3785@gmail.com>
Date: Tue, 13 Oct 2026 19:20:59 +0900
Subject: [PATCH] Round Voice Start Times Down To Output Samples

---
 Util/Audio/Mixer/VoiceMixer.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Util/Audio/Mixer/VoiceMixer.cs b/Util/Audio/Mixer/VoiceMixer.cs
index 9be63e6..b522d4b 100644
--- a/Util/Audio/Mixer/VoiceMixer.cs
+++ b/Util/Audio/Mixer/VoiceMixer.cs
@@ -75,8 +75,11 @@ internal sealed class VoiceMixer : IDisposable
     /// <summary>Voices currently mixed (started or waiting to start). Render thread only.</summary>
     public int ActiveVoiceCount => _voices.Count;
 
-    /// <summary>Output sample nearest to <paramref name="seconds"/>.</summary>
-    public static long ToSample(double seconds, int rate) => (long)Math.Round(seconds * rate, MidpointRounding.AwayFromZero);
+    /// <summary>
+    /// Output sample containing <paramref name="seconds"/> (seconds × rate rounded down), the sample at which
+    /// AudioSource.PlayScheduled starts a sound scheduled between two output samples.
+    /// </summary>
+    public static long ToSample(double seconds, int rate) => (long)Math.Floor(seconds * rate);
 
     // ── Main thread ──