a_pleasant_stroll/sound.lua

-- Defines constants and plays music and sound effects

function init_sound()
   -- each name maps to a pattern number to play
   music_map = {
      desert = 0
   }
end

-- call this once to initialize biome sound.
-- by convention channel 4 should always be the
-- preferred sfx channel, so we unmask it.
function play_biome_music(biome)
   music(music_map[biome], 2000, 7)
end