Every year, the 3rd of March marks 303 Day, a celebration of the classic Roland TB-303 Bass Line bass synthesizer and its impact on music.

While its official production run which took place between 1981 and 1984 was a commercial failure – owing partly to its somewhat unrealistic take on natural bass sound – remaining units were sold off cheaply by Roland and subsequently snapped up by savvy electronic musicians and producers. Its sound became a staple in EDM genres like acid house, Chicago house and techno.

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Roland retrospectively saw the cult success of the TB-303, and created its own software version. Now, to celebrate 2025 303 Day, the company is giving away 3,030 TB-303 Software Bass Line synthesizers via the Roland Cloud.

To be in with a chance to claim yours, you can sign up at the Roland Cloud from now until Monday, 10 March at 12AM PST, or until 3,030 TB-303 Software Bass Line Lifetime Keys have been claimed.

“Get hypnotic all over again with the TB-303’s warm, energetic sonic signature – the bouncing pulse that defined the acid house music and dance movement,” Roland teases.

To further facilitate the experience for new TB-303 soft synth owners, Roland has written four deep-dive features taking you through how to master its interface and create your own great sounds, and detailing its use in tracks Song of Life by Leftfield and Praise You by Fatboy Slim.

• Mastering the TB-303 Sequencer in Roland Cloud
• Beyond Acid: Pushing the TB-303 into New Sonic Territory  
• Sound Behind the Song: “Song of Life” by Leftfield
• Sound Behind the Song: “Praise You” by Fatboy Slim

For more information, head to Roland and sign up to the Roland Cloud.

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