Copy Z
Authored teaching scenario. The features below are constructed to show how a shared property is reasoned about. Nothing here was measured from a real tape, a real deck or a real recording.

Features present:
  F1  throughout    Broadband noise floor raised by about 9 dB
  F4  00:21.150     Click, 6 ms
  F5  00:04.900     Door closing, 300 ms
  F6  throughout    High-frequency rolloff above 12 kHz