Excuse me - I did not speak correctly; there is not an established software means of dealing with embedded lyrics - some programs do it one way, others another. some produce mid files with karaoke lyrics - other produce karaoke files with midi event lyrics. The point is that even though many programs can produce acceptable sheet music from a midi file - especially a midi file that is produced itself from a notation program rather then a live performance, the embedded lyrics may or may not show up depending on how the midi was produced and what program is being used to re-transcribe it.

ABC is much more standardized. PDF files are pretty much un-ambigious; but don't give those of use who cannot READ music a way to know what it sounds like.

We are talking DT purposes here, which basically means an un-ornemented simple melody line. Embedded lyrics do work if software is compatible - but you don't always know what is being used to produce and/or transcribe.