Music

Terraria has over thirty music tracks total as of version 1.3. Each one will play and loop endlessly while the player is in a specific biome or while certain events are taking place. Music is individual to each player, and as such its volume can be lowered or disabled entirely within the Options menu.

All the music in Terraria was composed by Scott Lloyd Shelly of Resonance Array.

In-game, it is possible to record and play these songs using the Music Box accessory.

PC soundtrack
The soundtracks can be listened to and purchased from Bandcamp. Currently, several themes are unavailable for purchase. They may be released in the future.

Overworld Day
This is track number 1 in the official soundtrack. It's a cheerful, upbeat, and simple tune that's almost surely to be the first one heard by a new player. It plays during the day in the Forest only if it is not corrupted/crimson or hallowed. It also plays on the title screen on the mobile version.

Eerie
This is track number 2 in the official soundtrack. It's slower and more sinister than most other tracks. It always plays in the Meteorite mini-biome. It will also replace the regular night music on many surface biomes while there's a Blood Moon.

This track also played within The Corruption prior to the 1.0.6 patch, the Dungeon prior to the 1.2 patch, and the Underworld prior to the 1.3.0.1 patch.

Overworld Night
This is track number 3 in the official soundtrack. It's relatively peaceful and relaxing, but its tune is a minor one. This track plays only during the night in the Forest, Ocean, Hallow and Snow surface biomes, but is replaced by Eerie when there's a Blood Moon.

Title Screen
This is track number 4 in the official soundtrack. It's a serene, solemn tune and is probably the slowest track in the game. Short and hooking, it normally only plays in the main menu of the game, before entering a world; however, it can play in-game when its corresponding music box is crafted and used.

Underground
This is track number 5 in the official soundtrack. It's fast and has an almost robotic tone. It plays within the Underground layer of the world unless the alternate/cavern soundtrack is already playing, and will continue into the Cavern layer until the end of the track, after which it transitions to the alternate soundtrack. These two are by far the largest biomes in the game before hardmode is reached. At that point, this track, along with the alternate soundtrack, may become significantly more difficult to access, as the Underground Hallow and the Underground Corruption (both of which have different tracks) will quickly start spreading through the underground.

Cavern/alternate underground
This track plays in the Cavern layer, but does not start until the Underground soundtrack finishes. Similarly, this track continues playing in the Underground until the end of the track. This track, along with the Underground track, become harder to access in hardmode due to the spread of Underground Corruption and Underground Hallow.

Boss 1
This is track number 6 in the official soundtrack. It's a loud, frenetic tune, similar to battle music. It plays during the fight with the Eye of Cthulhu (PC exclusively), King Slime, Eater of Worlds, Skeletron, Lepus, and Turkor the Ungrateful. In hardmode, it also plays during the fight with Skeletron Prime and Duke Fishron.

It also played during the Goblin Army Event prior to the 1.3.0.1 update.

Jungle
This is track number 7 in the official soundtrack. With an exotic, relaxed tune, it has an unique feel to it with a heavy emphasis on percussion. It plays only in the Jungle (day and night) and its underground extension, the Underground Jungle.

This track was added in the 1.0.5 patch. Before it, the Jungle used the Overworld Day/Night tracks and the Underground Jungle used the regular Underground track.

Corruption
This is track number 8 in the official soundtrack. Its melody somewhat resembles the Overworld Day track, but altered and slowed to sound much darker and more menacing. It plays in The Corruption during both day and night, but only on the surface. Once a world has entered hardmode, the Corruption will spread aggressively and this track will also play in Deserts, Oceans and Floating Islands that have been corrupted.

This track was added in the 1.0.6 patch. Before it, the Eerie track was used.

Underground Corruption
This is track number 9 in the official soundtrack. This track is a combination of The Corruption and Underground tracks. It plays within the Underground Corruption, likely only accessible once a world has entered hardmode.

This track was added in the 1.1 patch, along with the biome it plays in.

The Hallow
This is track number 10 in the official soundtrack. It has a heavenly, happy tone and makes use of instruments related to this idea, especially the harp. It plays in The Hallow, but only on the surface and during the day. Once a world has entered hardmode, the Hallow will spread aggressively and this track will also play in Deserts, Oceans and even Floating Islands that have been hallowed.

This track was added in the 1.1 patch, along with the biome it plays in.

Boss 2
This is track number 11 in the official soundtrack. It's a very hectic, frantic tune, and gives the feel of a chase, especially at the beginning. It plays during the fight with the Wall of Flesh and The Twins, which suits them very well.

This track was added in the 1.1 patch, along with all the possible situations it plays in.

Underground Hallow
This is track number 12 in the official soundtrack. This track is a combination of The Hallow and Underground tracks. It plays within the Underground Hallow, only accessible once a world has entered hardmode.

This track was added in the 1.1 patch, along with the biome it plays in.

Boss 3
This is track number 13 and the last in the official soundtrack as of 1.1.1. It's much slower and less intense than the other boss fights, giving it a more menacing and mechanical tone. It plays during the fight with The Destroyer, as well as invasions by the Frost Legion. As of 1.2, this track is also played during the fight with the Brain of Cthulhu.

This track was added in the 1.1 patch.

Ocean
This is track number 1 in Volume 2 of the official soundtrack. It is a tranquil theme with a somewhat slower pace than other daytime themes. It plays in the Ocean biome, but only if it hasn't been taken by the Hallow, the Corruption or the Crimson; their respective surface themes will play then.

This track was added in the 1.2 patch, and was featured as the first track in the 1.2 trailer. Note that, despite having the same name and being associated with the same biome, this theme is different to that of the console version.

Solar Eclipse
This is track number 2 in Volume 2 of the official soundtrack. It's dark with a varying pace and, keeping with the atmosphere of the event it plays in, features an organ to give it a classic horror feel. It plays during a Solar Eclipse.

This track was added in the 1.2 patch, along with all the possible situations it plays in.

Prior to the 1.2.1.2 patch, it also played during the Pumpkin Moon event, until it was given its own theme.

Rain
This is track number 3 in Volume 2 of the official soundtrack. It gives the effect of a peaceful and calming theme, slower and less upbeat than others. It plays during rain, overriding the Overworld Day, Overworld Night, Desert and Ocean themes.

This track was added in the 1.2 patch, along with the event associated with it.

Alternate Day
This is track number 4 in Volume 2 of the official soundtrack. Similar to the original Overworld Day theme, it shows a cheerful, upbeat tune similar to the Overworld Day theme, but with a more complex composition.

This track was added in the 1.2 patch.

Space
This is track number 5 in Volume 2 of the official soundtrack. It's quick and carefree. It plays when you are in space.

This track was added in the 1.2 patch. Similar to the Ocean theme, the Space theme is different from the console version's.

Golem
This is track number 6 in Volume 2 of the official soundtrack. It has a fast pace without being particularly dark or menacing. It plays during the fight with the Golem and the Lunatic Cultist fight. On the console and mobile versions, it is also used for the Pirate Invasion. It is played by the Boss 4 Music Box on the PC version, and Boss 5 on the console and mobile versions.

This track was added in the 1.2 patch.

Mushrooms
This is track number 7 in Volume 2 of the official soundtrack. It's an offbeat, exotic, and trippy piece. It plays in the Mushroom Biome, both on the surface and underground.

This track was added in the 1.2 patch.

Crimson
This is track number 8 in Volume 2 of the official soundtrack. It's an unnerving, dark, and unsettling theme with a faster pace than that of the Corruption. Its main melody comes near the end of the track. It plays in the Crimson.

This track was added in the 1.2 patch, along with all the possible situations it plays in.

Lihzahrd
This is track number 9 in Volume 2 of the official soundtrack. It is a mysterious and exotic sounding theme, feeling like being in an ancient world. It plays in the Jungle Temple.

This track was added in the 1.2 patch, along with all the possible situations it plays in.

Ice
This is track number 10 in Volume 2 of the official soundtrack. It is a relaxed, somewhat slow paced theme with a distinct, cold, and crystalline feel. It plays in the surface Snow biome. It is named Snow on the PC version.

This track was added in the 1.2 patch.

Plantera
This is track number 11 in Volume 2 of the official soundtrack. It is an unique, fast track with a rock-and-roll tune and prominent use of electric guitars. It plays during the fight with Plantera.

This track was added in the 1.2 patch.

Dungeon
This is track number 12 in volume 2 of the official soundtrack. Its a sinister, dark theme that makes use xylophones, which, in some popular works (especially old cartoons), are used to represent the sounds that bones make. It plays in the dungeon.

This track was added in the 1.2 patch. Before it, the Dungeon used the Eerie theme.

Lunar Boss
This is track number 13 in volume 2 of the official soundtrack. This is used in the Lunar Events, although it must of had no purpose until 1.3 as it as not used before then.

Desert
This track is currently absent from the official soundtrack. It is a simple, quiet theme inspired by ancient Egyptian music as commonly portrayed in other Video Games and Films. It plays in the Desert biome during the day, as long as it's not raining and the desert hasn't been taken over by the Hallow, Corruption or Crimson. It also plays in the Underground Desert. This track was added in the 1.2 patch, prior to which the Overworld Day theme was used. This theme was originally exclusive to the console version and was brought over to the PC version without being altered or replaced, unlike the Ocean and Space themes.

Underground Snow
This track is currently absent from the official soundtrack. It is a calm, mysterious, and wintery theme slightly reminiscent of the Alternate Underground theme. It plays in the Underground Snow biome. It played by the Ice Music Box on the PC version, and Snow on the Console and Mobile versions

This track was added in the 1.2 patch, along with all the possible situations it plays in. This theme was originally exclusive to the console edition, where it was used in any Snow biome.

Boss 4
This track is currently absent from the official soundtrack. It is a frenetic, serious theme, which uses sounds resembling bee buzzes and wing hovering. It plays during the fight against the Queen Bee. In the console and mobile versions, it is used in the fight of the Eye of Cthulhu, and Ocram. On the PC version it is played by the Boss 5 Music Box

This track was added in the 1.2 patch, along with all the possible situations it plays in. This theme was originally exclusive to the console edition.

Pumpkin Moon
This track is currently absent in the official soundtrack. It plays during the Pumpkin Moon event.

This track was added in the 1.2.1.2 patch, prior to which the event used the Eclipse theme.

Alternate Underground
This track is currently absent in the official soundtrack. It has a different, less whimsical feel than the original Underground theme. It plays within the Underground and Cavern layers of the world, alternatively with the other Underground track.

This track was added in the 1.2.2 patch.

Frost Moon
This track is currently absent in the official soundtrack. It plays during the Frost Moon event. It vaguely resembles a Christmas song, but is more upbeat and uses electric guitar.

This track was added in the 1.2.2 patch, along with all the possible situations it plays in.

Underground Crimson
This track is currently absent in the official soundtrack. Like the Underground Corruption and the Underground Hallow, it is a mix of the underground and crimson tracks. It plays in the Underground Crimson.

This track was added in the 1.2.4 patch.

Before this, it used the basic Crimson soundtrack.

Lunar Boss
This is track number 13 in volume 2 of the official soundtrack. It plays during the Lunar Event. This track was added into the game in 1.3.0.1.

Martian Madness
A track that plays during the Martian Madness event, which was added in 1.3. It was however released on YouTube on Feb 25th, 2015, as a 1.3-spoiler

The Underworld
A unique track for The Underworld, it plays instead of the Eerie theme since 1.3.

Goblin Invasion
A unique track for Goblin Army, it plays instead of the Boss 1 theme since 1.3. It somewhat vaguely resembles the Pumpkin Moon theme.

Moon Lord
A unique track that plays during the Moon Lord fight, it has a fast tempo and is fitting for a Final boss.

Console/Mobile soundtracks
The console soundtrack features a mix of the PC version's tracks and several additional songs. Although Blake Robinson was commissioned to create the music for the trailers, the in-game music was created by Scott Lloyd Shelly.

Ocean
A happy, peaceful sounding track that plays in the Ocean biome that can remind one of the waters. It is completely different from the PC version's Ocean theme.

Space
This track plays in Space. It is completely different from the PC version's Space theme. This track has a more slower and calmer feeling, like being free.

Tutorial
This track plays during the Tutorial in the Console version and Mobile version.

Title
This track plays in the title screen of the Console version. It is an extended variation of the PC title soundtrack, with more instruments and expression.