Huron & SNAP Documentation

96kHz Filters
Filter
Type
Number
Filter
Length
Latency in
Milliseconds
THE ENGINEERING TOOLS
• 1 96kHz Output device, which must support data formatted
as odd and even samples in the left and right channels of a
standard AES/EBU stream. This device may be a 96kHz
Digital to Analogue converter.
The 96kHz Convolver provides a selection of Finite Impulse
Response (FIR) filters into which measured or simulated
impulse responses may be loaded. 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 with the impulse
responses 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 convolved
96kHz signal.
Figure 58 — A schematic of connections to the 96kHz
Convolver
Rather than the standard Convolver filters the 96kHz Convolver
uses specifically designed 96kHz filters. These filters are
presented in the table below, and when using the 96kHz
Convolver replace the standard Convolver filters found in Table
1.
Latency
in
Samples
Number of DSP
resources used per
channel
Number of
Buffers
available
0 4116 0.02ms 2 4 3
1 69456 0.06ms 6 8 3
2 278020 0.10ms 10 12 3
3 8638 1.00ms 92 4 3
4 138844 1.00ms 96 8 3
5 17276 2.00ms 184 4 2
6 277848 2.00ms 188 8 2
7 32768 20.00ms 1936 4 15
8 65536 41.00ms 3934 4 15
9 131072 92.00ms 7874 4 7
10 262144 166.00ms 15896 4 3
Table 2 — Filters available to the 96kHz Convolver
HURON TECHNICAL MANUAL PAGE 194