[Luap]

Hello everyone here.
I got one track (Holidays by the Beach Boys) from a bootleg. The pitch was off so I applied pitch correction in Sound Forge. When checking these files in Audiochecker, the original track checks out as CDDA sourced, but the pitch corrected track as MPEG sourced!
How can this be? Does the pitch correction really alter the quality of the audio, or is this a 'bug' in Audiochecker?
Thanks,
Paul