Files in this archive are music moduls for "AY-3-8910/12 Emulator"
by S.V.Bulba. This files was got from different games and demos of ZX
Spectrum:
   1) *.zx50 - files are support by "AY-3-8910/12 Emulator" v1.1+
   2) *.stc - Sound Tracker files are support by "AY-3-8910/12 Emulator" v1.2+
   3) *.asc - ASM files are support by "AY-3-8910/12 Emulator" ver. 1.3+

You may to get russian version of this Emulator on next pages of Internet:
   1) "Russian ZX Spectrum page"
      http://www.zx.ru/echo/ 
      in section Emul's
   2) "World of Spectrum"
      http://www.void.demon.nl/
      or on its FTP 
      ftp://ftp.void.jump.org/pub/sinclair/music/players-pc/ay-8910.zip
      ftp://ftp.void.jump.org/pub/sinclair/music/aysongs.stc.zip
   3) E-Mail to author of Emulator (Sergey Bulba): vorobey@eol.ru