User manual

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7
Settings using Windows 2000
Open "Sounds and Multimedia Properties" (in the "Control Panels" folder) .
Select the register card "Sounds" and set the control of "Sound Volume" to "High".
set "Sound Volume" to
"High" (maximum)
click on "Apply"
close the window
by a click on "OK"
The controller "Sound Volume" is the master volume control for sound playback.
This controller can also be accessed by selecting the register card "Audio" followed by
a mouse-click on the "Volume" button in the playback range. Though it may be labelled
different there, the controller that can be identified as master volume control is
functionally identical with the one described above. Selecting the Checkbox "Mute"
will cut sound playback completely.
One more possibility to access the controller is from the Windows "Taskbar".
You can activate this option in the adequate checkbox shown above. If you do so,
please be concerned about the possibility of unintended faulty operation.
Note:
The Windows driver for PUC is labelled "USB Audio CODEC". It does not provide
settings for recording level.
PUC itself is referred to as "USB audio device" by Windows.
Working with application software
Adapting analogue level standards
Depending on its GPI settings PUC can handle maximum levels of +15dBu resp. +18dBu
at the analogue inputs and outputs. This is related to the specified reference levels of
+6dBu resp. +4dBu only by the settings (default or user) of your application software.
If PUC is operated in delivery status (+15dBu max. level), your application software needs
to be set in the way that reference level is 9dB lower than maximum level. This complies
to german studio standards.
If you operate your PUC with the GPI "INT LVL" activated (i.e. +18dBu max. level), your
application software needs to be set in the way that reference level is 14dB lower than
maximum level (i.e. +4dBu). This complies to common international studio standards.
see also page 4: Audio Options
Adapting digital audio formats
Audio format settings of your application software must correspond to the format of the
audio signal that is fed into the digital input of your PUC. These are basic settings, e.g.
- sample rate (e.g. 32kHz, 44.1kHz, 48kHz)
- resolution (be concerned: PUC max. 16bit)
- mono/stereo
Multichannel operation
It is possible to set up multichannel systems with several PUCs. In theory the maximum
number of channels depends on USB data thruput. But in practice it depends on the inter-
action of all system components like PC hardware, operation system, application software.
Note: In theory it is possible to transfer more than 16 stereo audio signals simultaneously via USB 1.1
Copy Protection (SCMS)
PUC provides Serial Copy Management System (SCMS), a system which restricts copying
audio data in the digital format.
When copying "original" audio data (e.g. from CD to MD), a so called "copy flag" is set
in the audio header data. This has no audible effect on the MD copy, but when this copy
is fed to the digital input of any device that is equipped with SCMS, these audio data will
be denied. PUC will in this case select the analogue inputs.
Audio data created in your application software and then fed through the PUC digital
output are in the original format, i.e. the copy flag is not set.