Zero-based index of the ACM codec used for a recording, CD ripping or exporting session.
This property is used only if the EncodeFormats.FormatToUse property is set to ENCODING_FORMAT_ACM and the when the EncodeFormats.ACM.EncodeMode property is set to ACM_ENCODE_USE_CODEC_INDEX.
The specific format for the chosen ACM codec can be modified through the EncodeFormats.ACM.CodecFormatIndex property.
For further details about using the Windows Audio Compression Manager refer to the EncodeACM class section.
For a tutorial about the use of the Windows Audio Compression Manager refer to the How to use the Windows Audio Compression Manager section.
For further information about available encoding formats see the EncodeFormatsMan class.