Gregtech-New-Bastards/.minecraft/config/txloader/load/galacticraftcore/sounds.json

{
  "galacticraft.musicSpace": {
    "category": "music",
    "sounds": [
      {
        "name": "music/absolutezero",
        "stream": true,
	"weight": 3
      },
      {
        "name": "music/nebulalullaby",
        "stream": true,
	"weight": 3
      }
    ]
  }
}