Abbingdon Music Research Compact Disk Processor CD-77 Owner's Manual
Also see for CD-77: Owner's manualOwner's manual
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Contents
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31An S/PDIF linkwas not offeredas this methodresults in exces-sive sonicdegradation3b. DAC InputIt is possible to allow playback of a large library of music to an exceptionally high standard through the CD-77’sDAC option (See Section 2 item 12 for connection details). Under the DAC mode, the DAC section of thecompact disk processor will disengage from the transport section. Instead, the digital signal from the USB input(R3) located at the rear of the CD-77 will be used as the music signal source.It is worth noting that the isosynchronous USB connection used in the CD-77, because of the almost negligibleintroduction of jitter, offers a sonic performance that is virtually indistinguishable from CD playback via theintegral transport.3c. Infra-Red LinkWhen using the CD-77 as part of a Home Theatre system, it is possible to connect a wireline remote controlcable to the IR link (R4). The CD-77 will become “slaved” to the remote control operation of the Home Theatresystem.3d. Crowbar ‘Muting’ CircuitDuring switch-on and standby/resume operation, the output of the CD-77 is ‘muted’ (turned off) in order toprevent any audible thumping noises during this period. Unlike the commonly used muting switches or transistorswhich are connected in series with the music signal, AMR has employed a relay which shunts across the output(a crowbar circuit). As a result, the muting circuit is completely removed from the path of the music signal whennot needed yet when engaged, offers complete protection for any equipment connected to the CD-77.Crowbar MutingCiruit when notrequired, is out ofthe signal path |
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