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POW-R is a wordlength reduction (dithering / noiseshaping) method, to reduce e.g. a 24 bit digital audio signal to e.g. a 16 bit wordlength without introducing any quantization distortions. The Weiss pow-r unit includes the standard set of three algorithms which make up the pow-r scheme, plus in addition offers flat TPDF dithering.
The pow-r unit is available in two versions, a two channel and a four channel version.

Features are:
24 bit single wire high-speed AES/EBU interfaces
input wordlength indication
PLL locked indication
bypass switch
dither type selection (pow-r#1, pow-r#2, pow-r#3, flat TPDF)
20 / 16 / 8 (for testing) bit output wordlength selectable
auto-blacking for dither noise
40bit floating point / 32bit fixed point processing
44.1 / 48 / 88.2 / 96kHz sampling frequencies supported
standalone 1hu 19" rackmount chassis
History of Pow-r

An innovative new technique for digital audio Word Length Reduction (WLR) is now available from the Pow-r Consortium, LLC. Some of the world's finest digital audio designers have come together as a team to create what is being hailed as the audio industry's most transparent and musically accurate method of reducing digital word lengths.

Pow-r, an acronym for Psychoacoustically Optimized Wordlength Reduction, is a unique, patent-applied-for algorithm, which reduces longer word lengths (20, 24, even up to 32 bits), to CD standard 16-bit format while retaining a high degree of perceived dynamic efficiency and very low noise. Pow-r is ready for all sample rates from 44.1kHz to 192 kHz, and beyond.

Pow-r is compact and designed for portability. The algorithm will operate optimally in both DSP and native software in digital audio workstation applications. Pow-r constists of three diferent algorithms, two beeing noiseshaping and one based on narrow-band Nyquist dither. Pow-r is free from artifacts present in other popular Nyquist-band or noiseshaping WLR techniques, such as "birdies" and "motorboating." With Pow-r, archaic look up tables are avoided and all audio program is decorrelated from Nyquist-band dither.

POW-R Technical Data:
AES/EBU Input:
Sampling Frequencies: 44.1 kHz, 48.0 kHz, 88.2 kHz, 96kHz
Maximum Input Wordlength: 24 Bits
Channel Status Data: Input accepts professional or consumer format.
Channel Status Bits forwarded to AES/EBU output: all
Connector: XLR female

AES/EBU Output:
Sampling Frequencies: 44.1 kHz, 48.0 kHz, 88.2 kHz, 96kHz
Output Wordlength: 24 Bits, 20 Bits, 16 Bits or 8 Bits
Connector: XLR male

Mains Voltage: 110 / 220 Volts with voltage selector
Fuse rating: 500 mA slow blow
Power Consumption: 40VA max

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