Naim Audio DAC-V1 - Manual (Page 4)

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Introduction
1.4 DAC-V1 Volume Control
DAC-V1 output volume can be controlled using either the
front panel volume control or the remote handset
vol+ and
vol- keys. Volume level is shown in the DAC-V1 display.
If the DAC-V1 is connected via USB to a computer,
depending on the functionality of the audio playback
application, the DAC-V1 volume and handset keys may
be able to control application output volume, and track
playback (play/pause, and next/previous). See Section
5.2.4.
If your DAC-V1 is to be connected to a further
“downstream” preamplifier, the DAC-V1 output volume
should be fixed by selecting the
Fixed Output option in the
Preamp Out setup menu (see Section 5.2.2). If headphones
are used with the DAC-V1 while Fixed Output is selected,
volume control will be restored while the headphones are
plugged-in.
1.5 DAC-V1 BitPerfect Analysis
Digital audio output data from computer audio playback
applications can sometimes be compromised by software
configuration and setup. For example, high-sample rate
data may by default be re-sampled to a lower rate,
or data bit-depth may be reduced by software based
volume control.
The DAC-V1 incorporates a BitPerfect analysis routine,
used in conjunction with downloadable test files, that
enables the integrity of data output from a computer to
the DAC-V1 to be analysed. BitPerfect analysis tests the
configuration of audio playback applications to help
ensure optimum audio quality. Use of BitPerfect analysis is
described in Section 5.3.