The sample rate is the number of samples of a sound taken per second to represent it digitally. The higher the sample rate, the more accurate the digital representation. Sample rates are measured in hertz (Hz) or kilohertz (kHz). Common sample rates for digital music and audio in videos range from 44.1 kHz to 192 kHz, with 44.1 kHz used for compact discs and 48 kHz for most digital video formats. Higher sample rates like 96 kHz and 192 kHz provide higher quality representation for professional music recording and mastering.