One Hour Compo celebrates it's 400th round on Thursday June 9th at 9:00PM EST! Don't miss it!

Compo is a slang word for "composition competition" commonly used by the arrangement community. It is derrived from the demoscene competitions by the same name. Contrary to this, compos are less of a competition and more of an excerise in composition abilites. Each compo has it's own unique format and guidelines and while some are as short as 1 hour, others can last anywhere from a month, to a few months. It's important to remember that the primary purpose of compos are to hone your skills and abilites by working within, sometimes very constricting, guidelines. These techiniques have proven essential to the growth of countless musicians.

Remember: the only way to lose a compo, is to not participate.

Recent Compos


152nd 2HourTrackSundays Event (2HTS152)  Active

2 hours, 49 minutes ago

Here is this week's theme video:

The participants have two hours to make a song and additional 15 minutes are granted for mastering and uploading. The chat happens on

  • Start: 1 hour, 16 minutes ago
  • Deadline: 1 hour, 28 minutes
  • Voting Ends: 6 days, 21 hours

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People's ReMixing Competition

Jet Set Radio - Sneakman (PRC343)  Active

2 days, 7 hours ago

Source: Jet Set Radio - Sneakman (SEGA)

"Okay so the song I chose is a bit of a weird one. It's Sneakman from Jet Set Radio, since I've been playing a lot of that recently.

Since Jet Set Radio's music relies heavily on samples, I decided to add a link to the samples used as well as the MIDI.

Page of the guy who originally found the samples:

Drive folder of the original track, MIDI, samples, and information on each sample:


​Deadline is Wednesday March 8th 2017, 10:59 AM ThaSauce Time (16:00 UTC, 18:00 GMT).

Check the following site for the rules:

Check the Ocremix thread for more information (you can post questions there):

After uploading, please check if your song plays and can be downloaded and played without problems.
Only upload MP3 Files.

It is not necessary to use ThaSauce. You can upload the song anywhere you want, but I must have a download link. So if you use SoundCloud, don't forget to allow downloads, otherwise your song does not count as an entry or bonus mix. I will still use ThaSauce as a possible place to submit songs and upload all the songs to the ThaSauce page to have the songs at one central place.

The winner of this round may select the source for PRC345 which is not the round after this one, but the round after the next round.

  • Start: 2 days, 7 hours ago
  • Deadline: 1 week, 3 days
  • Voting Ends: 2 weeks, 1 day

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One Hour Compos

One Hour Compo - Round 437 (OHC437)  Voting

2 days, 19 hours ago

Tonight's theme is a picture theme. Please see the resources below.

You will have 1 hour to complete your song and 10 minutes to finish it up. You will then have an additional 10 minutes to upload your song. At 6 PST/9 EST you may begin your mixing, please have your files uploaded by 7:20 PST/10:20 EST. Join us for discussion in #thasauce on

  • Start: 2 days, 19 hours ago
  • Deadline: 2 days, 17 hours ago
  • Voting Ends: 4 days, 4 hours

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Weekly Homework Composition

18th Weekly Homework Compo (WHC18)  Voting

3 days, 23 hours ago

This week we explore vocal chops with Panda:

  • Start: 5 days, 22 hours ago
  • Deadline: 2 hours, 16 minutes ago
  • Voting Ends: 6 days, 20 hours

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Meat and Potatoes VGM Remix Competition

Sexy 69 FF4 LOVE (MnP69)  Active

5 days, 20 hours ago

sexy 69 - theme of love, picked by Necrox. It's not kinky per se, but it is romantic. The more deprived of us will just have to think of some shitty fan-fiction sex twixt Rosa and her love...or loves ;) oh mai


  • Start: 5 days, 20 hours ago
  • Deadline: 1 week, 1 day
  • Voting Ends: 1 week, 3 days

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