What are A/D and D/A Converters?

A/D stands for “Analog to Digital”, and it refers to the process of converting an analog audio signal into digital audio information.

Examples of A/D conversion:

• A USB microphone has onboard A/D converters that convert the analog signal of your voice into digital information, which then enters your computer through the USB cable.
• When you plug an XLR (analog) microphone into an audio interface or digital recorder, the audio interface and recorder do the A/D conversion.

D/A stands for “Digital to Analog”, and it does the exact opposite conversion of the A/D converters. D/A converters convert digital audio information back into an analog audio signal so you can hear it.

Examples of D/A conversion:

• When you play any audio on your computer/phone/digital recorder, your computer/phone/digital recorder converts the digital audio information into an analog signal which is then sent to the little speakers in your phone/earbuds/headphones in order to create sound so you can hear it.
• If you play audio on your phone and your phone is connected to a Bluetooth speaker, the digital audio signal travels from your phone to the speaker (through the air!), and then the speaker converts the digital audio information into an analog signal which is then sent to its physical speaker in order to create sound so you can hear it.

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