On the Collectors Gold some new details on the Audio DVD for 'ELV1S 30 #1 Hits' were mentioned by David Bendeth, the producer. The interesting facts are:
The Six Special Bonus Tracks are NOT 5.1 DVD - Audio Multi - Channel, they are all in stereo.
Ray Bardini and David Bendeth have discovered a new which has not been used before with any artist until now. Elvis will be the first artist on the 5.1 DVD Audio Multi-Channel where this new technique on the mono tracks will be used. Until now the Z 1 Sound was used on mono tracks but this sounds quite electronical. With the mono-tracks on Elvis 30 # 1 Hits this technique gives a pure, acoustic, new surround sound.
David Bendeth fixed the pop on the song 'Hound Dog' and the band silence after 'In The Ghetto', it was 11 seconds and is now the normal 4 seconds. On not using the original track of 'The Wonder Of You' we should hear why with this release.
Source: ECG / Updated: Nov 13, 2002