Onset Detection for Audio Signals

1. What is onset detection?
2. What is onset detection in music?
3. What is the onset of a signal?
4. What is onset strength?

What is onset detection?

Onset detection is concerned with finding the start of a musical note immediately preceding the attack. Onset detection in conjunction with pitch detection are utilized in various processes such as pitch-shifting, synthesis, adaptive filtering and envelope generation, to name a few.

What is onset detection in music?

The audio signal is often considered to be a succession of the discrete acoustic events. The term music onset. detection refers to detection of the instant when a discrete event begins in a music signal.

What is the onset of a signal?

The onset of the note is a single instant chosen to mark the temporally extended transient. In most cases, it will coincide with the start of the transient, or the earliest time at which the transient can be reliably detected.

What is onset strength?

Onset strength at time t is determined by: mean_f max(0, S[f, t] - ref[f, t - lag]) where ref is S after local max filtering along the frequency axis 1. By default, if a time series y is provided, S will be the log-power Mel spectrogram.