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    [3] RFC 7845
        Ogg Encapsulation for the Opus Audio Codec

<a name="3"></a>
3 Terms and Definitions
    3.1 active track
        enabled track from the non-alternate group or selected track from alternate group

    3.2 actual duration
        duration constructed from valid samples

    3.3 edit
        entry in the Edit List Box

    3.4 padded samples
        PCM samples after decoding Opus sample(s) which are not valid samples
        An Opus bitstream always contains them partially at the