Я этим проверяю: The Sheffield Lab Test
Track 34. Recorded with the level of -10 dB.
Track 35. Recorded with the level of -20 dB.
Track 36. Recorded with the level of -30 dB.
Track 37. Recorded with the level of -40 dB.
Track 38. Recorded with the level of -50 dB.
Track 39. Recorded with the level of -60 dB.
Track 40. Recorded with the level of -70 dB.
Track 41. This track is a digital signal zero. Ideally, the track should play as a complete silence and is used to measure the background noise components or systems.