Recorded the background hum of a Sony clock radio, once again loaded into Audacity and changed to speed multiplier to 0.870, percentage change 13.000 and frequency range from 1297.059 to 1297.059 Hz.Quiet like the effect.
太空電台wave.wav
聲道：2
類型：wav
space、field-recording、radio-waves
空間、現場記錄、無線電波
資料來源：freesound ( https://freesound.org )