ZX SPECTRUM SOUND CHIP EMULATOR FILES STC

STC These files are created by ZX Spectrum program ST Song Compiler v1.2 or by built-in compiler of Sound Tracker (version from 1.1 to 1.3 of ST produces compatible modules). Simplified structure of STC module follows.

Offset Number of byte Name Description +0 1 Delay Minimal number of interrupts between notes of track +1 2 Positions Pointer Pointer to Positions table +3 2 Ornaments Pointer Pointer to Ornaments table +5 2 Patterns Pointer Pointer to Patterns table +7 18 Identifier String 'SONG BY ST COMPILE' +25 2 Size Length of all module +27 Size-27 Data Other data Many STC files have Identifier 'SOUND TRACKER v1.3' and they can be played in AY Emulator too. What is more, Identifier can contain any data, and many authors store in it name of song and so on. Also field Size can contain wrong data (for example, zero) or last two chars of song title.

Files of Super Sonic by KLAV are fully compatible with Sound Tracker, so you can simply give it STC extension to play in Ay_Emul (emulator cannot detect them by structure).

ZXS-files of ZXMUS.EXE Version 1.02 Beta by Super Dima from Kaluga are full analog of STC.