Changes

Field SFXID(in the SFX list for that field)

Plays a sound effect through the given sound channel. The channel is important because it's the parameter used in [[FF8/Field/Script/Opcodes/0CD_SESTOP|SESTOP]] to halt a specific sound effect(and to prevent multiple counds from silencing each other). AFAIK Channels go up to 2^20 (which is 1048576), so you can theoretically have 20 sounds playing at once. 0 doesn't seem like it's a usable channel, but this is untested.