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--- resources:tools-software:sigmastudio:toolbox:adialgorithms:automaticvolumecontrol [18 Feb 2013 16:50] – Added GUI controls table and example Brett Gildersleeve
+++ resources:tools-software:sigmastudio:toolbox:adialgorithms:automaticvolumecontrol [25 Jul 2014 22:25] – add adau145x information John McCarty
@@ Line 16: / Line 16: @@
 |Freeze Level (dB)|-36|-36 to -20|The threshold below which the algorithm considers a signal to be "noise" that is not suitable for amplification. When the audio input goes below this level, the output gain will remain unchanged. This effectively lets the algorithm ignore background noise when the main signal of interest is not present.|
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+**NOTE:** this algorithm introduces a constant delay to the audio signal regardless of the AVC Enable setting.  This algorithm only supports sampling rates of 44.1kHz and 48kHz (except for the ADAU145x processor which supports all sampling rates).
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+**ADAU145x DSP:** The ADAU145x implementation of this algorithm supports growing the input channels for 5.1/7.1 applications. However, the volume detection is calculated from the first 2 inputs only (left and right) and the resulting level compensation and delay is applied to all other channels.
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 ===Example===
 The following example test circuit shifts the AVC's input between two tone levels 20dB apart:

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