reference

Time signatures

A metre is not only how many beats there are. It is also which notes may be beamed together and which sounds have to be written as two notes tied — and on this site both of those are derived from the two numbers rather than typed in.

The ten

2/42 beats · simple 3/43 beats · simple 4/44 beats · simple 5/42 beats, grouped 2 + 3 · simple 2/22 beats · simple 3/83 beats · simple 6/82 beats, grouped 3 + 3 · compound 9/83 beats, grouped 3 + 3 + 3 · compound 12/84 beats, grouped 3 + 3 + 3 + 3 · compound 7/83 beats, grouped 2 + 2 + 3 · simple

Beaming groups, in sixteenths

Metre	Bar	Beat	Beats	Groups	Kind
2/4	384	192	2	4 + 4	simple
3/4	576	192	3	4 + 4 + 4	simple
4/4	768	192	4	4 + 4 + 4 + 4	simple
5/4	960	192	2	8 + 12	simple
2/2	768	384	2	8 + 8	simple
3/8	288	96	3	2 + 2 + 2	simple
6/8	576	288	2	6 + 6	compound
9/8	864	288	3	6 + 6 + 6	compound
12/8	1152	288	4	6 + 6 + 6 + 6	compound
7/8	672	96	3	4 + 4 + 6	simple

Bar and beat are counted in ticks of a 768-tick whole note, which divides by two five times and by three as well, so every value this site can write is a whole number.