Horns are recreational items that can be used on Rovers, or placed on Storage Canisters to play musical tones. They can be sounded by pressing the Use key (F on PC), or be activated by any type of Target Pin or Context Slot.
Crafted Horns[]
Crafted horns can be made at any time by the player in the Backpack, Small Printer, and Medium Printer.
Small Trumpet Horn
Medium Buggy Horn
Large Fog Horn
Discovered Horns[]
Discovered Horns are found in various locations on different planets. They are functionally the same as crafted horns, with different appearances and sounds.
Small Squeaker Horn - Found on Backpacks of fallen Astroneers- Medium Truck Horn - Found on wrecks of Rovers
- Large Starship Horn - Found on wrecks of Rovers
Small Squeaker Horn
Medium Truck Horn
Large Starship Horn
Small Horn Instruments[]
Small Trumpet Horns are able to change their sound to a different instrument when placed upon 
Medium Resource Canisters, Large Resource Canisters, or Medium Gas Canisters filled with a resource. Every resource produces a different instrumental sound, with the pitch of the horn changed depending on the amount of the resource placed inside of the canister. Medium Canisters play notes from C3 to G5, while Large Resource Canisters play notes from C1 to C#5, with each standard pitch class changing every 8 nuggets. Mircotones may be produced when placing less than 8 nuggets to reach the next note, allowing for large canisters to provide a larger range of music.
Instruments[]
The following table displays the instruments that each resource produces.
| Resource | Instrument |
|---|---|
 Compound
|
Keys - Piano |
 Resin
|
Synth - Saw Vintage |
 Quartz
|
String - Double Bass |
 Organic
|
String - Air Bass |
 Wolframite
|
String - Crystal Guitar |
 Clay
|
Synth - SquareDeal |
 Hematite
|
Synth - InstCoaleesce |
 Malachite
|
Keys - Accordionica |
 Laterite
|
Keys - OrganWhiter |
 Ammonium
|
String - Flanged |
 Graphite
|
String - Ngoni |
 Titanite
|
String - RockBaby |
 Lithium
|
Synth - LostGalaxy |
 Astronium
|
Synth - WarpedScrape |
 Sphalerite
|
Synth - InLove |
 Glass
|
Woodwind - FluteTech |
 Carbon
|
Vocal - Choir |
 Tungsten
|
Synth - Bumbledrone |
 Ceramic
|
Woodwind - Recorder |
 Iron
|
Horn - Holz |
 Copper
|
Horn - Snow |
 Aluminum
|
Horn - Reaktor |
 Titanium
|
String - Retro |
 Zinc
|
Synth - Sharpeggio |
 Methane
|
Brass - Tuba |
 Sulfur
|
Woodwind - Clarinet |
 Argon
|
Woodwind - Oboe |
 Hydrogen
|
WoodWind - ReedRed |
 Nitrogen
|
Woodwind - SaxBariton |
 Helium
|
Vocal - Voxi |
 Silicone
|
Synth - SadSally |
 Rubber
|
Synth - BoneShaker |
 Plastic
|
Kazoo |
 Explosive Powder
|
Percussion - ElectricMallet |
 Steel
|
Percussion - DrumKit |
 Tungsten Carbide
|
Percussion - Ghatam |
 Aluminum Alloy
|
Synth - DarkNotes |
 Graphene
|
Synth - Saw |
 Titanium Alloy
|
Synth - BlockThing |
 Diamond
|
Synth - Rinsing |
 Nanocarbon Alloy
|
Synth - StringTheory |
 Scrap
|
Synth - OnMyWay |
Medium Canister Scale[]
The following table displays the scale of notes for Medium Resource Canisters and Medium Gas Canisters. The exceptions are Quartz, which plays two semitones higher, and Nitrogen, which plays about 6.5 semitones higher. The Medium Gas Canister doesn't distinguish partial small canisters of gas for the purpose of music, so 1-4 resources sound the same as 5, 6-9 sound the same as 10, and so on.
| # of Resources | Note | Octave |
|---|---|---|
| 1 | C | 3 |
| 2 | C # | 3 |
| 3 | D | 3 |
| 4 | D # | 3 |
| 5 | E | 3 |
| 6 | F | 3 |
| 7 | F # | 3 |
| 8 | G | 3 |
| 9 | G # | 3 |
| 10 | A | 3 |
| 11 | A # | 3 |
| 12 | B | 3 |
| 13 | C | 4 |
| 14 | C # | 4 |
| 15 | D | 4 |
| 16 | D # | 4 |
| 17 | E | 4 |
| 18 | F | 4 |
| 19 | F # | 4 |
| 20 | G | 4 |
| 21 | G # | 4 |
| 22 | A | 4 |
| 23 | A # | 4 |
| 24 | B | 4 |
| 25 | C | 5 |
| 26 | C # | 5 |
| 27 | D | 5 |
| 28 | D # | 5 |
| 29 | E | 5 |
| 30 | F | 5 |
| 31 | F # | 5 |
| 32 | G | 5 |
Large Canister Scale[]
The following table displays the scale of notes for the Large Resource Canister. Each resource nugget adds 12.5 cents (1/8 of a semitone) to the tuning, requiring 8 nuggets to increase the pitch by one semitone. Each pitch is unique and discernable, allowing microtonality to be used.
| # of Resources | Note | Octave |
|---|---|---|
| 1 | C | 1 |
| 9 | C # | 1 |
| 17 | D | 1 |
| 25 | D # | 1 |
| 33 | E | 1 |
| 41 | F | 1 |
| 49 | F # | 1 |
| 57 | G | 1 |
| 65 | G # | 1 |
| 73 | A | 1 |
| 81 | A # | 1 |
| 89 | B | 1 |
| 97 | C | 2 |
| 105 | C # | 2 |
| 113 | D | 2 |
| 121 | D # | 2 |
| 129 | E | 2 |
| 137 | F | 2 |
| 145 | F # | 2 |
| 153 | G | 2 |
| 161 | G # | 2 |
| 169 | A | 2 |
| 177 | A # | 2 |
| 185 | B | 2 |
| 193 | C | 3 |
| 201 | C # | 3 |
| 209 | D | 3 |
| 217 | D # | 3 |
| 225 | E | 3 |
| 233 | F | 3 |
| 241 | F # | 3 |
| 249 | G | 3 |
| 257 | G # | 3 |
| 265 | A | 3 |
| 273 | A # | 3 |
| 281 | B | 3 |
| 289 | C | 4 |
| 297 | C # | 4 |
| 305 | D | 4 |
| 313 | D # | 4 |
| 321 | E | 4 |
| 329 | F | 4 |
| 337 | F # | 4 |
| 345 | G | 4 |
| 353 | G # | 4 |
| 361 | A | 4 |
| 369 | A # | 4 |
| 377 | B | 4 |
| 385 | C | 5 |
| 393 | C # | 5 |
Trivia[]
- To completely tune a "piano" with all the standard pitch classes requires 2,760 nuggets of a resource. (1+9+17+...+169+177+185 = 186*12 = 2,232 for the notes C1-B2 on Large Canisters, plus 1+2+3+...+30+31+32 = 33*16 = 528 for the notes C3-G5 on Medium Canisters)
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