Be careful about alignment.

Sources/AudioKit/MIDI/Packets/MIDIPacketList+SequenceType.swift

@@ -39,12 +39,10 @@ extension MIDIPacketList: Sequence {
 public func extractPacketData(_ ptr: UnsafePointer<MIDIPacket>) -> [UInt8] {
 
  let raw = UnsafeRawPointer(ptr)
- let lengthPtr = raw.advanced(by: MemoryLayout.offset(of: \MIDIPacket.length)!)
  let dataPtr = raw.advanced(by: MemoryLayout.offset(of: \MIDIPacket.data)!)
 
- let length = lengthPtr.withMemoryRebound(to: UInt16.self, capacity: 1) { pointer in
- Int(pointer.pointee)
- }
+ let length = Int(raw.loadUnaligned(fromByteOffset: MemoryLayout.offset(of: \MIDIPacket.length)!,
+ as: UInt16.self))
 
  var array = [UInt8](repeating: 0, count: length)
  memcpy(&array, dataPtr, length)
@@ -61,26 +59,22 @@ public func extractPacket(_ ptr: UnsafePointer<MIDIPacket>) -> MIDIPacket? {
 
  var packet = MIDIPacket()
  let raw = UnsafeRawPointer(ptr)
- let lengthPtr = raw.advanced(by: MemoryLayout.offset(of: \MIDIPacket.length)!)
- let timestampPtr = raw.advanced(by: MemoryLayout.offset(of: \MIDIPacket.timeStamp)!)
- let dataPtr = raw.advanced(by: MemoryLayout.offset(of: \MIDIPacket.data)!)
 
- let length = lengthPtr.withMemoryRebound(to: UInt16.self, capacity: 1) { pointer in
- Int(pointer.pointee)
- }
+ let length = raw.loadUnaligned(fromByteOffset: MemoryLayout.offset(of: \MIDIPacket.length)!,
+ as: UInt16.self)
 
  // We can't represent a longer packet as a MIDIPacket value.
  if length > 256 {
  return nil
  }
 
- packet.length = UInt16(length)
- packet.timeStamp = timestampPtr.withMemoryRebound(to: MIDITimeStamp.self, capacity: 1, { pointer in
- pointer.pointee
- })
+ packet.length = length
+ packet.timeStamp = raw.loadUnaligned(fromByteOffset: MemoryLayout.offset(of: \MIDIPacket.timeStamp)!,
+ as: MIDITimeStamp.self)
 
+ let dataPtr = raw.advanced(by: MemoryLayout.offset(of: \MIDIPacket.data)!)
  _ = withUnsafeMutableBytes(of: &packet.data) { ptr in
- memcpy(ptr.baseAddress!, dataPtr, length)
+ memcpy(ptr.baseAddress!, dataPtr, Int(length))
  }
 
  return packet