In the context of synthesizers, what does spurs refer to?

In the context of synthesizers, "spurs" refers to unwanted noise frequencies that can interfere with the intended signals. These spurious signals are typically generated as a byproduct of the mixing and modulation processes within the synthesizer. They are not harmonics of the primary signal but rather extraneous frequencies that manifest due to non-ideal characteristics of the components used in the synthesizer, such as imbalances in the circuits or insufficient filtering.

Understanding spurs is important when working with synthesizers because they can detract from the purity of the sound and lead to a less desirable audio output. By recognizing the presence of spurs, users can take steps to minimize their impact, such as employing better design practices, using higher quality components, or adding filtering techniques to clean up the output signal.

The other options refer to different aspects of audio processing; harmonic distortion relates to the alteration of frequencies due to nonlinearities, low-frequency signals pertain to signals in the lower end of the frequency spectrum, and desired modulation refers to intentional changes made to a signal for creative effects. These do not describe the unintended sounds and frequencies that characterize spurs.