Tape recording of audio programme produces significant noise signals underlying the audio signal. Measurements show that total modulation noise is significant; often around 25 dB down from a sinusoidal audio signal, although historical measurement methods give numbers that may exceed 50 dB. The persistent popularity of tape in the audio industry may indicate a preference for some of the more salient tape characteristics; perhaps even modulation noise. Measurements on a variety of tapes; machines are presented in an attempt to understand the basic principles. A model of modulation noise is developed which provides a broad steepening spectral peak centred on the signal frequency; captures much of the tape noise character. This could be the basis of a plug-in to simulate such noise. A new measurement method is presented culminating in a single plot which gives a useful more complete picture of modulation noise.
Saturday May 30, 2026 9:00am - 11:00am CEST Foyer Building 303ATechnical University of Denmark Asmussens Alle, Building 303A DK-2800 Kgs. Lyngby Denmark
