Note length multiplier via x MML character

[KungFuFurby]

The utilization of commas for parameters sounds nice, but for note lengths, there is a conflict with others. Plus, ties are nice for extending note lengths, but when used for default note lengths (#1 is my main citation), they conflict with the actual tie VCMD ($C6) that is used in the sound driver.

Thus, I came up with a solution that turns a note length into a fraction. Why?

MML's note lengths act as a divider. Thus, all note lengths are currently represented as 1/x, where x is the note length. My idea is to use the x character to act as a multiplier for the note length, rather than using ties (because ties conflict with the actual tie command of N-SPC) or commas (because if a length is a parameter, then the multiplier is optional: using commas would force this to be a requirement).

Thus, by using 1x4 as a note length, you're defining a note length of 4/1, or four whole notes.

The x part can also be defined without a preceding note length to simply act as a multiplier of the default note length.

If the default note length is defined with x as the first character, then the preceding default note length divisor is used and

It can also be used to multiply exact tick note lengths... =96x2 would make it 192 ticks total.