The speed of the motion is controlled through the use of pulse-code modulation.
From the en.wikipedia.org
Digital audio uses pulse-code modulation and digital signals for sound reproduction.
From the en.wikipedia.org
Pulse modulation schemes aim at transferring a narrowband analog signal over an analog baseband channel as a two-level signal by modulating a pulse wave.
From the en.wikipedia.org
Digital audio is sound reproduction using pulse-code modulation and digital signals.
From the en.wikipedia.org
It may also include analog-over-analog pulse modulatated baseband signals such as pulse-width modulation.
From the en.wikipedia.org
Laser power was adjusted by pulse-width modulation to maximize signal without saturating the charge-coupled device.
From the nature.com
This is a kind of pulse-width modulation.
From the en.wikipedia.org
Depending upon the capacitance and the quality of constant-current pulse-width modulation, this can largely eliminate modulation at 100 or 120 Hz.
From the en.wikipedia.org
If the frequency of the pulse-width modulation is too low and or the user is very sensitive to flicker, this may cause discomfort and eye-strain, similar to the flicker of CRT displays.