3.4 Read back or Playback is a type of audio engineering process where audio recordings are played back to an engineer and listened to for errors or inconsistencies. This process is used in audio production and post-production, as well as in the music industry. It is an important step in ensuring the quality of the final product. There are two main types of 3.4 Read back or Playback: real-time playback and non-real-time playback. Real-time playback is when the engineer listens to the audio as it is being recorded, allowing them to catch any errors as they happen. Non-real-time playback is when the engineer listens to the audio after it has been recorded, allowing them to catch any errors that may have been missed during the recording process.