dig·i·tal-to-an·a·log converter (d?j??-tl-t?-?n??-lôg?, -l?g?)n. Abbr. DAC A device that converts a digital signal into an analog signal, especially into an electrical signal whose voltage reflects the digital values. Digital-to-analog converters are commonly used to convert digital media for playback on analog devices, such as speakers, headphones, and older televisions. Also called D/A converter.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.