Analog-Digital Audio Converter. Ideal when amplifiers, soundbars, or active speakers have too few or no analog audio inputs. Uncompressed digital LPCM stereo signal output with a 48 kHz sampling rate. Includes a high-quality ADC (Analog-Digital Converter) for the best sound reproduction. Supports simultaneous audio output via optical and coaxial digital outputs. The Marmitek Connect AD12 is a digital audio converter that allows you to connect an analog stereo signal to a digital playback device. This can be useful if your turntable does not have a built-in phono preamplifier or if your amplifier does not have enough analog audio inputs. The Connect AD12 features both Toslink and coaxial outputs, making it compatible with a variety of playback devices.