Digital-to-analog audio converters accept a compatible digital output from a source, such as an optical, coaxial, or HDMI connection, and convert the audio signal. They send analog audio through outputs such as left and right RCA connections to equipment with analog inputs, such as an amplifier or receiver.

Check that an audio format converter accepts the source connection your system uses, such as HDMI, optical Toslink, or coaxial digital audio. Then confirm its output matches the destination, such as analog left-and-right RCA or stereo audio, and verify that it supports the signal format you need.

A project may need an audio converter with stereo downmixing when an HDMI source sends multichannel audio but the connected display or sound system uses two-channel audio. The converter can extract the audio and convert it to stereo for playback through compatible equipment.

Check the converter’s specifications against the source equipment’s output format, such as coaxial, Toslink, or HDMI, and its audio format and sample rate. Also confirm that the converter’s output connection and audio format match the receiving equipment.