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PrismSound AD-2

Nigel Lord 22 December 2010

 What is it?An A/D converter designed for music applications. DetailsThe AD-2 operates like two separate A/D converters – plus a digital processor – in one unit. It can generate two entirely separate output signals simultaneously. These can have different sampling rates, different word-lengths – or even use different noise-shapers. For example, it’s possible to output a 96kHz/24-bit signal and a 44.1kHz/16-bit noise-shaped signal at the same time. Dynamic range extends to 130dB, while THD+N at full scale is raised to 108dB (0.0005%). The AD-2 also offers enhanced clock stability and rejection of incoming reference jitter. The analogue front-end of the AD-2 includes software-programmable sensitivity (and inter-channel balance) over the entire range with 0.05dB resolution. The inputs are transformerless, electronically balanced and galvanically isolated (fully floating), to ensure freedom from noise pick-up and crosstalk. The digital-to-digital path offers re-dithering, noise-shaping and DRE encoding/decoding, as well as conversion of synchronous sample-rate 96kHz, 24-bit masters to 44.1kHz 16-bit streams. PrismSound’s DRE (Dynamic Range Enhanced) function is included on the AD-2, making it possible to make 24-bit quality recordings on 16-bit recorders. The front panel gives a clear indication of the main control settings at all times. Audio level is shown on 16-segment meters complemented by a digital level readout in the LCD display. A menu system allows control of operating parameters, and 16 memories are provided (including eight ‘factory’ modes) which can be recalled at the push of a button. A unique ‘Setup Wizard’ feature simplifies configuration of the AD-2 for new users. 

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