Which channel is dedicated to the witness in a four-channel reporting system?

In a four-channel reporting system, Channel 2A is specifically reserved for capturing the voice of the witness. This structured approach helps to isolate the witness's testimony from other audio inputs, ensuring clarity and precision in the recorded material. By dedicating a specific channel to the witness, the reporting system allows for easier identification and playback of that individual's statements, facilitating a more accurate transcription process. This separation of audio sources enhances the overall quality of the recording, which is crucial in legal contexts where precise documentation of witness testimony is essential for court proceedings.