export bitrate and VBR fields to a csv file

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1

Hi,
I'm trying to insert the BITRATE and VBR fields into a csv export file, but its not working using:
%bitrate% or %vbr%

How can I export that sort of data on a csv file?

SOLVED***
inserted as %_bitrate% and %_vbr%

2

The correct names are %_bitrate% and %_vbr%