Crane Song HEDD 192 - Manual (Page 8)

It is also possible to add this dither to an existing audio source. Dither can be added by
running digital in, digital out and selecting the part of the Process switch that is labeled 16 bit
or 20 bit depending on what you want to dither to. To disable the dither run the unit where the
process switch is labeled 24 bit. This will record correctly on a 16 bit recorder
EXTERNAL WC SYNC
The external WC connections are for A/D convertor synchronization with an external world.
They do not effect the digital inputs because the digital inputs provide their own clock infor-
mation. The input connection is used to synchronize the A/D convertor to an external
source. The output connection is at the rate of the A/D convertor whether internal or external
clock is selected and can be used as a sync. source. When HEDD recognizes and locks on
to external WC and WC is selected on the front panel an LED by the sample rate switch
lights up to indicate lock. If there is no lock HEDD defaults to a 44.1 KHz sample rate.
METER
The meter is calculated by the DSP and follows the HEDD process, as selected by the
process switch. The peak hold can be set to run in one of two different modes. First is a 2
second hold then the peak indicator will drop back to a lower level. In the second mode the
peak value is held until the OVER RESET button is pushed. This mode is good for those of
us that may have to leave the room and want to know what the maximum value was during
the transfer. There is an internal jumper that can be changed or select either options. The
default mode is memory or hold forever.
OVERS
The Over led lights on detecting a digital over load. This is done by the DSP. The Over
indicator will respond from the analog input when the process is selected as analog or A/D.
The Over indicator will respond to the digital source when the process is selected as digital
or D/A. We are defining a digital over as a single sample overload.
APPLICATIONS
HEDD can be used for many different tasks. It can be operated in the following modes;
analog in / analog out; digital in / digital out; and as A/D and D/A convertors with the signal
processor operation attached to either convertor.
You can put it on the stereo bus of a digital console feeding a digital device or have analog
output. It can be used as the A/D convertor and D/A convertor for a digital tape multi track
or a DAT machine. It can go between 2 DAT machines in the digital mode to process existing
material. You can even use it to convert to analog for processing and then back to digital.
HEDD is also useful for tracking and mixing, and it can be used analog in, analog out. It will
allow you to do amazing things to individual tracks. HEDD can also be used in mastering as
a convertor or as a digital in / digital out processor. HEDD opens up a new world of signal
processing.
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