The new mixes created for the box set were made in January–February 1996. Linett wrote: "In mixing "Pet Sounds" in stereo, every attempt was made to duplicate the feel and sound of the original mono mixes. Vocal and instrumental parts that Brian left off the record in 1966 were noted and duplicated, as were the fades." To this end, a Scully model 280 4-track was used to transfer the analog reels to digital multi-tracks – the same model used for "Pet Sounds". The mix was then processed through an original tube console from United Western Recorders in the 1960s.