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PCM 91 디지털 리버브는 Lexicon의 가장 우수한 리버브 중의 하나로 사운드 디자이너들을 위해 풍부한 프로그램 기능은 물론, 쉽게 익히고 사용할 수 있도록 해주는 강력한 인터페이스를 갖춘 콤팩트한 크기에 저렴한 가격대의 제품입니다.
PCM 90이 갖추고 있었던 모든 기능에 안전한 AES/EBU I/O과 새로운 듀얼 리버브 알고리즘, 그리고 2 채널과 서라운드 환경을 위한 다이나믹 공간화 이펙트를 가진 새로운 프리셋 기능 등이 보강되었습니다.
모든 듀얼 리버브 알고리즘과 프리셋 기능(이 보강된 기능은 PCM 90에 장착하여 쓸 수 있도록 PC card로 판매되고 있습니다)이 PCM 91에 내장되어 있습니다.
450개에 달하는 프리셋 기능은 실제 세상에서 얻어지는 소리들을 제공하며, 사용자가 원하는 프리셋을 빠르고 쉽게 찾아내기 위해 “찾기”와 “분류” 기능들이 제공되고 있습니다.
제품 내에 있는 PCMCIA 카드 슬롯은 그 안에 메모리 카드를 넣고 사용자 자신의 프로그램을 저장할 수 있도록 해 줍니다.


::::특징::::
* AES/EBU 와 S/PDIF I/O
* 15알고리즘 :5 스테레오 와 10 듀얼 리버브
* 450개의 Preset 프로그램 ;100개의 User
* 2-채널 또는 서라운드를 위한 다이나믹한 공간 이펙트
* 밸런스 아날로그 I/O-XLR 와1/4"Inputs 과 Outputs
* Digital I/O -S/PDIF 와 AES/EBU
* 110dB 이상의 다이나믹
* 소프트웨어 업그레이드와 사용자가 편집 가능한 Preset 그리고 시스템 저장을 위한 PCMCIA Card Slot
* 기본적으로 50개의 Preset과 100개의 사용자 Registration.



Features at a Glance
* All of the features of the PCM 90 PLUS built-in Dual Reverb
* AES/EBU and S/PDIF I/O
* 15 Algorithms: 5 Stereo and 10 Dual Reverb
* 450 Preset programs; 100 User
* Dynamic spatialization effects for 2-channel or surround applications


Standard Features
* Lexicon's "greatest hits" – reverb algorithms of the last decade including Random Hall, Random Ambience, Rich Plate, Concert Hall and Split Chamber
* Balanced Analog I/O- XLR and 1/4" inputs and outputs
* Digital I/O- S/PDIF and AES/EBU
* Keyword Search: Allows quick, intelligent search of the presets by application (i.e. vocals, drums etc.) or alphabetical order
* A front panel Adjust knob is automatically attached to one or more of the parameters you're likely to want to change in each factory tailored preset. This allows immediate modification of each preset in real time without ever going into the Edit mode.
* Pro and Go Modes: Go mode gives you access to as many as ten hand-picked parameters for any particular preset. Pro Mode allows full access to an Edit Matrix of as many as a hundred parameters.
* Greater than 110dB of Dynamic Range
* Dual Lexichip Architecture- These are our own propietary microprocessors, custom designed by our own chief scientists to meet Lexicon's rigorous specifications.
* PCMCIA Card Slot for software updates and user-edited preset and system set up storage.
* 50 Factory Presets and 100 Internal User registrations are standard. .


250 All-New Presets
The PCM 91 includes all of the acclaimed sounds from the PCM 90 Digital Reverberator, and also includes the algorithms and presets found in the PCM 90 Dual Reverb Card.
250 all-new presets have been designed for the PCM 91, with real-world applications in mind. We spent countless hours fine-tuning them – so you don't have to. Furthermore, to enable you to make adjustments quickly, we have placed the most useful parameters for each sound within easy reach, in a user-definable soft row.

To make it even easier to find your sounds, we've clearly labeled each of the Banks and Rows so you'll always know where you are. For example, as you scroll through the first bank of programs, the label reads Halls: Orchestral. When you enter the next row within that bank, the display changes to Halls:Vocal.

PCM 91 Reverb Algorithms
Our research into the physics of classical acoustics is embodied in the Random Hall algorithm. Echograms of real halls have dispelled the myth of pre-delay and early reflections. In actual spaces, there is no empty interval between the direct sound's arrival and maximum reverb density to be filled in by early reflections. Instead, ambience builds gradually, with diffuse and complex reflections which do not color the timbre of the sound the way that fixed delay taps do.

Random Hall's unique Size, Shape and Spread parameters control the buildup and decay of the ambient envelope. Size determines how large the environment will be. Shape controls the contour of the ambient build: at its highest settings, it provides an inverse envelope for effects and gating. Spread controls the duration of Shape – the ambient envelope – setting the buildup and sustain.

There are also precision filters for spectral control of reverberation time, and the unique Spin and Wander parameters add random movement to the entire algorithm, ensuring silky smooth reverberant decay. Try preset Deep Blue on a piano to get a feel for this algorithm.

A new Concert Hall algorithm was designed for the PCM 91. We borrowed the character from the classic PCM 70 sounds and added Spatial EQ and a Compressor.

We created the Ambience algorithm specifically for the post-production environment. It enables accurate matching of a previously-recorded ambience, so that new elements may be blended in seamlessly and realistically. You can place sound effects, dialogue, or even musical instruments and previously-recorded music, at different depths and panning within the 'space'.

Voices are particularly interesting when processed with this algorithm – try the Spatial Room preset for an example.

The Rich Plate algorithm is designed to simulate plate reverberation devices popular in the '70s and '80s. Typically, plates are bright and highly diffused, with characteristically colored reverberation content. Two stereo pre-echoes can be used to create soft-diffused or hard, non-diffused reflections. Try Cool Plate on a snare drum to explore the possibilities of this algorithm.

Another all-new algorithm called Chamber/Room has also been developed for the PCM 91, which allows two independent stereo reverbs to run simultaneously within the machine. This algorithm can be arranged as Stereo, Mono, or Reverse Mono.