Huron & SNAP Documentation

96kHz Filters
THE EQUALISATION TOOLS
• 1 96kHz Digital to Analogue converter. This converter must
support data formatted as odd and even samples of the left
and right channels of a standard AES/EBU system.
The 96kHz EQ utilises customised 96kHz convolution filters to
undertake its signal processing.
Incoming signals are processed by an external 96kHz analogue
to digital converter and are input to the Huron system via a
synchronous Lake Digital Input Module as a set of odd and
even 48kHz data streams. These signals are then convolved by
EQ 96kHz with the responses in the EQ canvasses before being
output as a pair of odd and even digital output signals through a
Lake Digital Output Module. These interleaved signals may
then be mixed by an external 96kHz digital to analogue
converter to produce a single Equalised signal.
Figure 91 — A schematic of connections to the 96kHz EQ
Low Latency Minimum DSP
Length Latency
Smpl.
Latency
Secs.
The 96kHz EQ utilises specific 96kHz filters during
convolution. These filters have the following properties, and
should be used in place of the standard EQ filters when running
the EQ 96kHz.
The following filters are available to the 96kHz EQ:
DSP Length Latency
Smpl.
Latency
Secs.
4116 2 0.02 4 4116 2 0.02 4
8638 92 1.00 4 8638 92 1.00 4
69456 6 0.06 8 17276 184 2.00 4
138844 96 1.00 8 32768 1936 20.00 4
278020 10 0.10 12 65536 3934 41.00 4
131072 7874 82.00 4
262144 15896 166.00 4
Patching EQ 96kHz
DSP
For each I/O of 96kHz EQ, the EQ 96kHz requires an input
signal that has been divided into two 48kHz streams of data.
HURON TECHNICAL MANUAL PAGE 268