diff --git a/Sources/MIDIKitSMF/MIDIFile/Chunk/Track.swift b/Sources/MIDIKitSMF/MIDIFile/Chunk/Track.swift
index fbebf277e4..e07a96d138 100644
--- a/Sources/MIDIKitSMF/MIDIFile/Chunk/Track.swift
+++ b/Sources/MIDIKitSMF/MIDIFile/Chunk/Track.swift
@@ -309,17 +309,15 @@ extension MIDIFile.Chunk.Track {
     /// Returns ``events`` mapped to their beat position in the sequence.
     /// This is computed so avoid frequent calls to this method.
     /// Ensure the `ppq` supplied is the same as used in the MIDI file.
-    public func eventsAtBeatPositions(ppq: UInt16) -> [(beat: Double, event: MIDIFileEventPayload)] {
+    public func eventsAtBeatPositions(ppq: UInt16) -> [(beat: Double, event: MIDIFileEvent)] {
         var position: Double = 0.0
-        return events.lazy
-            .map { $0.smfUnwrappedEvent }
-            .map { (delta, payload) in
-                let deltaTicks = delta.ticksValue(using: .musical(ticksPerQuarterNote: ppq))
-                if deltaTicks != 0 {
-                    position += Double(deltaTicks) / Double(ppq)
-                }
-                return (beat: position, event: payload)
+        return events.map {
+            let deltaTicks = $0.delta.ticksValue(using: .musical(ticksPerQuarterNote: ppq))
+            if deltaTicks != 0 {
+                position += Double(deltaTicks) / Double(ppq)
             }
+            return (beat: position, event: $0)
+        }
     }
 }
 
diff --git a/Sources/MIDIKitSMF/MIDIFile/Types/TimeBase.swift b/Sources/MIDIKitSMF/MIDIFile/Types/TimeBase.swift
index c62204d4a6..79dcc04917 100644
--- a/Sources/MIDIKitSMF/MIDIFile/Types/TimeBase.swift
+++ b/Sources/MIDIKitSMF/MIDIFile/Types/TimeBase.swift
@@ -12,7 +12,7 @@ import MIDIKitCore
 extension MIDIFile {
     /// MIDI file timebase as described in the MIDI file header.
     public enum TimeBase: Equatable, Hashable {
-        /// Musical: Delta-time ticks per quarter note (PPQN / PPQ / PPQBase).
+        /// Musical: Delta-time ticks per quarter note (PPQN / PPQ / PPQBase / TPQN).
         ///
         /// Common values: 96, 120, 480, 960. Cubase exports at 480 by default.
         /// Can also be a larger value if needed.
@@ -41,8 +41,8 @@ extension MIDIFile.TimeBase {
 extension MIDIFile.TimeBase {
     var rawData: Data {
         switch self {
-        case let .musical(TicksPerQuarterNote):
-            return (TicksPerQuarterNote & 0b01111111_11111111)
+        case let .musical(ticksPerQuarterNote):
+            return (ticksPerQuarterNote & 0b01111111_11111111)
                 .toData(.bigEndian)
             
         case let .timecode(smpteFormat, ticksPerFrame):