Zero-based index of the specific format for the ACM codec used for a recording, CD ripping or exporting session: the ACM codec can be modified through the EncodeFormats.ACM.CodecIndex property.
This property is used only if the EncodeFormats.FormatToUse property is set to ENCODING_FORMAT_ACM and the EncodeFormats.ACM.EncodeMode property is set to ACM_ENCODE_USE_CODEC_INDEX.
For further details about using the Windows Audio Compression Manager refer to the ACM object 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 EncodeFormats object.