The Otari DAS (Digital Archite System) Series is a set of equipment used to digitize analog audio signals on magnetic tapes at high speed. The system consists of three units - analog tape player (open reel or cassette), analog-to-digital conversion unit, noise reduction/level normalization unit (PC software). Numerous analog tapes (such as talking books) which have been stored in information fascililites such as libraries, broadcast stations, etc.) can be digitized efficiently. High-speed digitizing at 2 or 4 times normal playback speed. Various track formats supported - monaural 2 tracks to stereo 4 tracks. All tracks are reproduced simultaneously. The signals of the reverse direction channels can be automatically flipped during digitizing. Three sampling frequencies supported - 48 kHz, 44.1 kHz, 22.05 kHz (48 kHz & 44.1 kHz : only with 2x speed). The digitized audio data is stored as WAVE format files. Removable type hard disk drives are used for storing digital audio. The analog tape players are controlled from the A/D conversion unit. A PC keyboard connector is supplied on the A/D conversion unit. Noise reduction and level normalization can be performed on the digitized audio. DAISY system supported - It is possible to generate phrase index data for the DAISY system. The index data can be generated using cue signals recorded on the analog tapes (special order). Digitized programs can be used as master programs for the Otari duplication systems. [MTR-15DAS2/4] [DAS-2/4C] [DAS-ADC Unit] [Noise Reduction/Level Normalization]