I've released version 1.31 of musixtex, which defines macros \zzdoublebar, \zzbar and \zendpiece, and version 2021-01-07 of the autosp preprocessor which allows \Cp as an abbreviation for \Cpause.
http://icking-music-archive.org/software/musixtex/musixtex131.zip http://icking-music-archive.org/software/autosp/autosp-2021-01-07.zip or from CTAN.org. Bob T. ------------------------------- TeX-music@tug.org mailing list If you want to unsubscribe or look at the archives, go to https://tug.org/mailman/listinfo/tex-music
