only write PCM to stdout

Sources/Core/AudioPacket.swift

@@ -3,18 +3,15 @@ import Foundation
 public struct AudioPacket {
   public let timestamp: Date
   public let duration: Double
-  public let peakAmplitude: Float  // useful for level monitoring
   public let rawAudioData: Data
 
   public init(
     timestamp: Date,
     duration: Double,
-    peakAmplitude: Float,
     rawAudioData: Data
   ) {
     self.timestamp = timestamp
     self.duration = duration
-    self.peakAmplitude = peakAmplitude
     self.rawAudioData = rawAudioData
   }
 }