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This article needs additional citations for verification. 8-channel Cirrus Logic CS4382 digital-to-analog converter as used in a sound card. DACs are commonly used in music players to convert digital data streams into analog audio signals. They are also used in televisions and mobile phones to convert digital video data into analog video signals which connect to the screen drivers to display monochrome or color images.
Discrete DACs would typically be extremely high speed low resolution power hungry types, as used in military radar systems. Piecewise constant output of a conventional DAC lacking a reconstruction filter. In a practical DAC, a filter or the finite bandwidth of the device smooths out the step response into a continuous curve. An ideal DAC converts the abstract numbers into a conceptual sequence of impulses that are then processed by a reconstruction filter using some form of interpolation to fill in data between the impulses. DACs and ADCs are part of an enabling technology that has contributed greatly to the digital revolution. To illustrate, consider a typical long-distance telephone call. Specialist standalone DACs can also be found in high-end hi-fi systems.
Similar digital-to-analog converters can be found in digital speakers such as USB speakers, and in sound cards. In voice over IP applications, the source must first be digitized for transmission, so it undergoes conversion via an ADC, and is then reconstructed into analog using a DAC on the receiving party’s end. Top-loading CD player and external digital-to-analog converter. Video signals from a digital source, such as a computer, must be converted to analog form if they are to be displayed on an analog monitor. A device that is distantly related to the DAC is the digitally controlled potentiometer, used to control an analog signal digitally.
IBM Selectric typewriter uses a mechanical digital-to-analog converter to control its typeball. A one-bit mechanical actuator assumes two positions: one when on, another when off. The motion of several one-bit actuators can be combined and weighted with a whiffletree mechanism to produce finer steps. The IBM Selectric typewriter uses such as system.