Manual

Table Of Contents
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10.3 Delays and CPU Usage
10.3.1 Sample Delays
The sample delay (latency) of the plug-in depends upon the particular codecs selected. The
monitor outputs are delay compensated, so if more than one codec is selected in the CODEC
LIST, then the reported delay is the maximum of the individual codec delays. This field is
updated in the GUI immediately a new codec or other setting is selected. Depending on the
host behaviour, the new value might not be available for delay compensation until the plug-in
is removed and re-instantiated.
Individual codec sample delays are given in the following tables:
44.1kHz
48kHz
mp3
CBR max/min
13489 / 7345
13489 / 7345
VBR
37041
39127
mp3-HD
3072
3072
AAC-LC
CBR/VBR
3648
3648
HE-AAC
CBR max/min
7398 / 7300
7398 / 7300
VBR
7300
7300
HE-AAC v2
CBR/VBR
9153
9153
HD-AAC
4096
4096
Apple AAC
VBR
5120
8192
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88.2kHz
96kHz
mp3
CBR max/min
26978 / 14690
26978 / 14690
VBR
74082
78254
mp3-HD
6144
6144
AAC-LC
CBR/VBR
7296 / 3648
7296 / 3648
HE-AAC
CBR max/min
14796 / 6302
14832 / 6312
VBR
14600
14604
HE-AAC v2
CBR/VBR
18306
18306
HD-AAC
6144
6144
Apple AAC
VBR
12288
12288
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10.3.2 CPU Usage
All codecs are mathematically intense, and some have significant latency as a result.
Separately from the latency, some of the codecs are also CPU-intensive. The user can take
advantage of advances in CPU power in modern computers if appropriate, but can also use
the plug-in extensively with older and possibly lower-powered computers by selecting fewer
codecs simultaneously.