what stays centred · what is spread · why the low end is not panned
Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.
Three sizes in one archive — from a sheet on the fridge to a poster on the wall.
A dot marks where the image lands between the loudspeakers, not where the knob points. Check the mix in mono: the centre rises by 3 dB there.
A pan knob does not move sound through space. It does exactly one thing: change the balance of level between two channels. One of the two cues the ear uses to find direction is precisely that — a level difference between the ears, and it arises when the head casts an acoustic shadow.
The shadow exists only while the wave is shorter than the head. At 1.5 kHz the wavelength is 23 centimetres, exactly the path from one ear to the other; below that the wave bends around the head and almost no level difference remains. At 50 hertz the wave is seven metres long — some thirty heads.
That is why a club or a cinema runs one subwoofer for everyone, and why the kick and the bass are kept centred not out of tradition: spread apart they will not move left and right, but they will hand half the available headroom to one loudspeaker.
Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 8 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.
two shapes, twelve chords each
12 keys · key signatures · relative minors
one coil or two · six builds · where it sits along the string, and how high above it
15 chords every beginner starts with · standard tuning E A D G B e