Function formatBarPosition

formatBarPosition(
    beatInQuarters: number,
    meter: MeterLike,
    decimals?: number,
): string
Render an absolute position as the bar.beat a DAW or a score shows: 1-based bar, 1-based felt beat.

The felt beats counted are the ones the bar actually has. A meter change starts a new bar, so the bar it interrupts is short, and a position that rounds past the end of a short bar reads as the downbeat of the next one rather than as a beat the bar never reached.
Parameters
- beatInQuarters: number
  Absolute position in quarter-note beats.
- meter: MeterLike
  A single signature, or the piece's meter map.
- decimals: number = 2
  Digits of the fractional beat to keep.
Returns string
The formatted position in one of two forms: bar.beat on a felt beat, e.g. '3.2' for bar 3, felt beat 2; and bar.beat+fraction between felt beats, e.g. '3.2+0.5' halfway from the second felt beat to the third. A reader of these strings has to take both, since most onsets of an ordinary piece fall between pulses.
Example
```
import { formatBarPosition, parseTimeSignature } from '@libraz/libcantus';
formatBarPosition(7.5, parseTimeSignature('6/8')); // '3.2'
formatBarPosition(8.25, parseTimeSignature('6/8')); // '3.2+0.5'
```
- Defined in src/core/meter/index.ts:765