The odd panning in the early Beatles' records is a consequence of the wiring of the REDD.51 desk used for mixing. According to the REDD.51 handbook, the console was designed with stereo recording of symphonic, opera and oratorio music in mind. The orchestra was recorded in stereo on the first two tracks of the tape. Tracks 3 and 4 then were reserved for spot balance of solo instruments or orchestral sections. The console had four tape replay inputs on faders 1, 2, 7, and 8. Tracks 1 to 4 were routed to these four faders usually in order. Track 1 to fader 1, track 2 to fader 2, track 3 to fader 7 and track 4 to fader 8. The console had four sub-group faders, called Main faders. For stereo mixing Main faders I and II were usually used. Main faders I and III were hard-wired Left, Main faders II and IV were hard-wired Right. For stereo mixing, faders 1 and 7 (tracks 1 and 3) were routed to Main fader I, and faders 2 and 8 (tracks 2 and 4) were routed to Main fader II. Hence, contents of track 1 (drums and bass) and track 3 (lead vocals) ended being panned Left, contents of track 2 (guitars) and track 4 (lead vocals) ended being panned Right. However, one could narrow the panning of either fader pair 1 and 2, or fader pair 7 and 8, by using a stereo width control called spreader. This meant that the orchestra could be recorded in stereo on tracks 1 and 2, and the soloist vocals or instruments, on tracks 3 and 4, could be brought to the centre of the stereo image by using the spreader control. This was usually the case of the early Beatles' stereo mixes. For instance, on Beatles for Sale and Help!, tracks 1 (drums and bass) and 2 (guitars) are panned left and right respectively, and tracks 3 and 4 (vocals, lead instruments and percussion) are panned almost to the centre. The first two LP's were recorded on twin-track, with rhythm group on track 1 and lead instruments and vocals on track 2. Since, track 1 went into fader 1, and track 2 into fader 2 of the console, track 1 ended being panned left and track 2 ended being panned right. According to Recording the Beatles, for the third LP, 4-track recording was relatively new to the Beatles sessions and tape tracks were filled in the order in which they were recorded. Then when mixing for stereo the hard-wiring of the REDD.51 console made some wierd stereo positioning of instruments that did not please George Martin, so the LP was mixed on a REDD.37 console with full panning on all faders.
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