I don't know which program created the files. They were downloaded from the internet. The suffix was abc. But importing abc-files into Biab should be independent from the creation. The abc-format is defined.
Defined? Oh dear no. Like many amateur formats, ABC is a clown car with only the loosest of standards and no organization or governing body to maintain them. Any definitions are merely suggestions.
Simple? Yes, Free? Absolutely. A mess? Yep, that too. Since there's no established commercial application, there's nothing for anyone else to conform to.
ABC Notation As the above web site freely admits:
There is now a vast array of software (mostly freeware or shareware) which can read or edit abc. It is almost impossible to maintain a list of what software has which functionality on each platform but the following tables may help (N.B. the entries are based on what software developers say about their own programs rather than independent testing).I'm not interested in an argument. Frankly, I couldn't care less about ABC and find notation much easier to read. I do know about standards, definitions and inter-application compatibility.
I am only the messenger.