>>Howdy!
>>
>>I'm having some trouble coming up with a regex matching expression for a small string format:
>>

>>C3#:4.
>>-or-
>>F4-:16t
>>-or-
>>E2b
>>

>>
>>These represent musical notes.
>>
>>"C" is the base note (A - G, uppercase only).
>>"3" is the octave (1 - 6).
>>"#" is the accidental (optional: can be "#" sharp, "b" flat, "-" natural, or "" omitted).
>>":" is required if anything follows...
>>"4" is the duration (1 whole, 2 half, 4 quarter, 8 eighth, 16 sixteenth, 32 thirtysecond)
>>"." is the duration modifier (optional: can be "." dotted, "t" triplet, or "" omitted)
>>
>>So the first char must be [A-G] and the second char must be [1-6]. After this it gets a little hairy. The accidental is optional, so it's possible to have the colon immediately follow the octave digit. If there is a colon, then there must be a duration digit and there cannot be a duration modifier without a duration digit.
>>
>>Thanks!
>
>Keith,
>
>No testing, but have a go at this
>

>^([A-G][1-6][-#b]?(:(1|2|4|8|16|32)[.t]?)?)$
>

Thank you Gregory, it works well!