These are recordings in the “old” style. But that is not the case with above (Paul Berner & Michael Moore). These are “moderne” (nowadays) sound but recorded with just one microphone.
… but not what many people would think of as ‘one microphone’, as it’s a Calrec Soundfield mic which is (I think) a tetrahedral array of four capsules and needs a bit of fun post processing to make a stereo master.
The lovely stereo AEA ribbon in the video isn’t strictly a single mic either.
I think the poster is getting at an approach to capturing the sound in the room the way old school classical engineers would - with a single mic array - and no spot mics and minimal mixing.
So that one was recorded with a Josephson C700S - which has 3 microphone capsules (two directional, one omni) in the single housing.
So far these are all co-incident mic techniques (first order ambisonic, blumlein pair, c700s)
Many purist classical recordings use ‘near co-incident’ techniques (mostly ORTF) or spaced omnis / arrays (eg Decca tree), because the timing differences help with stereo imaging.
It would be nice if there where more recordings like that.
