Update Settings.sampleRate for iOS 18

Author: NickCulbertson

Cookbook/Cookbook/CookbookApp.swift

@@ -11,6 +11,14 @@ struct CookbookApp: App {
         #if os(iOS)
             do {
                 Settings.bufferLength = .short
+                
+                let deviceSampleRate = AVAudioSession.sharedInstance().sampleRate
+                if deviceSampleRate > Settings.sampleRate {
+                    // Update sampleRate to 48_000. Default is 44_100.
+                    Settings.sampleRate = deviceSampleRate
+                }
+                
+                
                 try AVAudioSession.sharedInstance().setPreferredIOBufferDuration(Settings.bufferLength.duration)
                 try AVAudioSession.sharedInstance().setCategory(.playAndRecord,
                                                                 options: [.defaultToSpeaker, .mixWithOthers, .allowBluetoothA2DP])

Cookbook/CookbookCommon/Sources/CookbookCommon/Recipes/MiniApps/DrumSequencer.swift

@@ -127,6 +127,7 @@ struct DrumSequencerView: View {
             conductor.start()
         }
         .onDisappear {
+            conductor.isPlaying = false
             conductor.drums.destroyEndpoint()
             conductor.stop()
         }

Cookbook/CookbookCommon/Sources/CookbookCommon/Recipes/MiniApps/DrumSynthesizers.swift

@@ -64,6 +64,7 @@ struct DrumSynthesizersView: View {
             conductor.start()
         }
         .onDisappear {
+            conductor.isRunning = false
             conductor.stop()
         }
     }