SJB wrote:Gary's post shows how the stereo out of phase can affect a track combining stereo channels into mono.
This demo goes a little deeper and gives an insight using up to date kit - how the people mixing stereo so in mono its ok for things like radio do it.
https://www.youtube.com/watch?v=fCFMzF6affAI have tried to find out which machines the original apache was recorded on. Seems most of the historical stuff starts at 1960 - then drops on to the beetles. Seems likely that apache was recorded in mono initially.
Now for live mixing:-
For bands that use a mixer into a PA system - the PA in mono - then mixing of instruments could get very interesting. Say two guitars playing the same riff - exactly in tune and play timing very accurate , and the same type of guitar with the same settings - could prove interesting. Probably never happen - but the cancelling effect could come and go.
Apache - and a good many other tracks (by all sorts of people) recorded ensemble as one take (even if there were numerous attempts) was recorded just once - but on two set-ups simultaneously, each with a different engineer, in a different control room. The mikes were routed to a stereo mixer and machine on the one hand and to a mono mixer and machine on the other. The mono method of recording to a half-track (or far more likely, full-track recorder) was known at Abbey Road as "delta mono", because the routing diagram inside the mixer resembled the path(s) taken by a river delta (except of course, that the "flow" was the other way round, many channels to one, rather than a river delta's one channel to many).
This continued until multi-track - 4-track in the first instance - started to be used. There have been tales, though, that the 4-track machines were not used immediately and that the older, tried and tested methods continued for a while (even by George Martin).
There are a few sources for this. The first one (I don't know who wrote it, but it's pretty good):
https://www.taisawards.com/inpage/the-shadows/Another with a general discussion on the "birth" of 4-track at EMI:
https://forums.stevehoffman.tv/threads/so-why-such-extreme-stereo-separation-on-beatles-albums.301959/page-10There's an 11-page ShadowMusic discussion at:
http://www.shadowmusic.bdme.co.uk/viewtopic.php?f=11&t=3244There's a useful discussion on EMI and recording in general at:
https://www.gearslutz.com/board/mastering-forum/474202-width-knob-abbey-road-mastering-console-2.htmlAnd (this is all for now), see page 28 (in a 1976 article entitled "FROM MONO TO MULTITRACK") at:
https://worldradiohistory.com/Archive-All-Audio/Archive-Studio-Sound/70s/Studio-Sound-1976-08.pdf