Bill Evans "When I fall In Love" Portrait Riverside Stereo reissue of "Portrait"

Does anyone else notice the 'continuous tone' in the background that runs through the entire length of this song?  It sounds like a Dolby 'A' test tone to me.  It drive me nuts!  I haven't heard anyone else mention it.  So now I am wondering, are there any versions of this LP that do not have the annoying 'tone' on this track, or is this something that all versions have?  I was considering trying out the half track master tape copy, but am not interested if it is the same as the LP.

Thanks

Norman