From 346b3ef378378ae6ff0e41eb6d157a8ea69894f5 Mon Sep 17 00:00:00 2001
From: Dallas Groot <dallas_groot@me.com>
Date: Sat, 11 Apr 2026 19:28:18 -0700
Subject: [PATCH] quick fix

---
 iOS/Views/Visualizer/MitsuhaVisualizerView.swift | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/iOS/Views/Visualizer/MitsuhaVisualizerView.swift b/iOS/Views/Visualizer/MitsuhaVisualizerView.swift
index 96010a6..aeeefa3 100644
--- a/iOS/Views/Visualizer/MitsuhaVisualizerView.swift
+++ b/iOS/Views/Visualizer/MitsuhaVisualizerView.swift
@@ -326,9 +326,12 @@ struct MitsuhaVisualizerView: View {
                 // (e.g. on a radio buffer hiccup), causing the next tick to be
                 // deferred by a full interval — the visible "stall" in the wave.
                 TimelineView(.periodic(from: .distantPast, by: tickInterval)) { timeline in
-                    let tickDate = timeline.date
                     Canvas { context, size in
-                        _ = tickDate
+                        // Read timeline.date INSIDE Canvas — this is the critical dependency
+                        // that tells SwiftUI to re-evaluate Canvas on every timeline tick.
+                        // Reading it outside the Canvas closure (as a let) doesn't establish
+                        // the Canvas redraw dependency, causing the occasional stall.
+                        let _ = timeline.date
                         box.resizeIfNeeded(count: config.numberOfPoints,
                                            idleAmplitude: Float(settings.idleAmplitude))
                         guard box.displayLevels.count >= 2 else { return }
@@ -378,7 +381,9 @@ struct MitsuhaVisualizerView: View {
             if !playing {
                 box.levelHistoryBuf.removeAll(keepingCapacity: true)
                 box.historyWriteIdx = 0
-                box.peakFollower    = 0.01
+                // Do NOT reset peakFollower here. Resetting to 0.01 means the
+                // first resume frame gets normFactor=100x (1/0.01), spiking
+                // normal levels (~0.5) to 1.0 — the "raise up" on resume.
                 box.lastTickTime    = 0
                 DebugLogger.shared.log(
                     "PAUSE → levelHistoryBuf cleared, lastTickTime reset " +
@@ -386,6 +391,9 @@ struct MitsuhaVisualizerView: View {
                     category: "VisDebug", level: .info)
             } else {
                 box.resumeTickCount = 0
+                // Warm-start peakFollower so normFactor begins around 3x not 100x
+                box.peakFollower    = 0.3
+                box.lastTickTime    = 0
                 DebugLogger.shared.log(
                     "RESUME → isRenderingActive=\(isRenderingActive) " +
                     "isAppActive=\(isAppActive) isVisible=\(isVisible) " +