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CDプレーヤー AVM EVOLUTION CD2のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。AVM EVOLUTION CD2 19 ページ。 Cd-player evolution

Besides this the digital filter increases the sampling frequency by a factor of 8 (oversampling) through extre-

mely fast calculation of intermediate values, thereby permitting the analogue filter at the converter output

to be laid out in as considerate a manner as possible with regard to phase and amplitude.

All necessary pulse frequencies are produced by a mutual, extremely precise pulse generator.

The audio digital information is available in CD standard format (16 Bit! 44.1 kHz) on each of the three dig-

ital outputs.

THE DIGITAl/ANALOGUE (D/A) CONVERTER

The raw data from the digital filters is passed discretely through separate channels to the D/A

converters. We install only pre-selected Burr-Brown PCM 1704 converters. This high precision parallel con-

verter is considered to be the best product available on the market. Strict selection procedures and careful

laser trimming of the converter by the manufacturer ensures constant high tonal quality of the CD2.

THE ANALOGUE·FILTER

Filtering the signals after conversion ensures that unwanted frequency remnants (aliasing, sampling frequen-

cy) are removed from the converted audio signal. We regard filtering to be very important. The way in which

filters work with phase and amplitude of the signals can have serious effects on the tonal quality of a D/A

converter. We have created a filter that causes no ampiitude or phase errors within the audio frequency

range. This was possible because upsampling means that aliasing components are only to be expected after

half of the sampling frequency has been reached ie. initially after 48 kHz or 44.1 kHz. By employing 8 x over-

sampling in the digital filter these limits are displaced even further upwards.

THE ANALOGUE OUTPUTS

The Cinch or XLR analogue outputs of the CD2 possess two discretely constructed power amplifiers. Their

great ability to provide a current supply coupled with their low output resistance ensures precise transmiss-

sion of the musical signals to the pre amplifier.The phase position of the output signal can be rotated through

180 degrees via the remote control.