Algorithm Manual Revision 4

VP-8
English Manual – Updated 2018-02-28 223
VP-8
The VP-8 Stereo algorithm occupies:
►
@ Normal Sample Rate: 2/4 DSP Resource
►
@ Double Sample Rate: not available.
The inputs and outputs of this algorithm are dis-
tributed as follows:
Input Output
1
E1
E2
E3
E4
1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
Introduction
VP-8 is a pitch change algorithm for multichan-
nel applications.
Up to 8 channels can be handled simultane-
ously. Using intelligent splicing, VP8 has been
designed specifically for transposing multichan-
nel, polyphonic material. However, Doppler shifts
on entire stems may also be performed using its
smooth pitch update capability.
With typical splice size settings, there will be a
delay around 1 frame through the algorithm (32
to 40 ms). Additional delay may be added for
precise alignment with frame boundaries or sync
points.
Inputs and Outputs
For maximum flexibility, two groups of channels
(1 to 4 and 5 to 8) can be set independently or
operated together. Audio phase coherency is
maintained within both groups.
When processing 5.1 or 7.1 material, this leaves
you with several channel assignment options
which is the reason why channels are labeled 1
to 8 instead of specific channel names.
For 5.1 transposing or Doppler shifting of non-
music content, the recommended assignment is:
►
1 L
►
2 R
►
3 Center
►
4 n/a
►
5 SL
►
6 SR
►
7 LFE
►
8 n/a
For 5.1 transposing or Doppler shifting of music
material, the recommended assignment is:
►
1 L
►
2 R
►
3 Center
►
4 LFE
►
5 SL
►
6 SR
►
7 n/a
►
8 n/a
For both 5.1 situations, this assignment may
work better in special cases:
►
1 L
►
2 R
►
3 SL
►
4 SR
►
5 Center
►
6 LFE
►
7 n/a
►
8 n/a
For 7.1 transposing or Doppler shifting of non-
music content, the recommended assignment is:
►
1 IL
►
2 IR
►
3 Center
►
4 LFE
►
5 L
►
6 R
►
7 SL
►
8 SR
For 7.1 transposing or Doppler shifting of music
material, the recommended assignment is:
►
1 L
►
2 R
►
3 Center
►
4 LFE
►
5 IL
►
6 IR
►
7 SL
►
8 SR