Guthrie: Apart from the digital transfers that we made in London, it was all done at das boot recording, yes. My studio is a collection of gear I've acquired over the years that I consider to be the best amalgam of analog and digital. We live in a digital world, but a lot of equipment that makes the most pleasing sound to me is still analog. Having that analog gear means we can always use the original master tapes in conjunction with newer digital files.
I use Studer A827 2-inch multi-track recorders that can be configured as 16-track, 24-track, or even 8-track. On the digital side, it's all SADiE for workstations with various high-quality options for ADC and DAC. Nothing is done "in the box." The workstations are used as tape machines, and all tracks are output through a digitally controlled analog console made by Euphonix. Multitrack playback DACs are made by Prism. Mix converters were dCS for TDSOTM and WYWH and Prism for ATD. Meitner converters are used for transfers to DSD. I'm a big fan of [founder of EAR valve amplifiers] Tim de Paravicini, and I use numerous pieces of equipment that he has designed and built, including some custom pieces that he has made for me.