Spreadsheets Synth
Acid bass synth + sequencer
Free · Designed for iPad. Not verified for macOS.
Launch special — free for a limited time. The acid bassline machine from the band Spreadsheets: squelch, sequence, repeat.
The 303 lives between the sheets. Spreadsheets Synth is an acid bass synthesizer with a built-in step sequencer — a cultural product of the band Spreadsheets, tuned to 313K and pointed straight at the dance floor.
THE SQUELCH
Sawtooth or square through a resonant filter with cutoff, resonance, decay, and accent — from rubbery basslines to screaming acid leads. Add distortion for grit, then send it into orbit with the phaser and delay.
THE SEQUENCER
Program patterns step by step, set the line looping, and ride the cutoff live. It's an instrument for performing, not just programming.
PLAYS WITH YOUR WHOLE RIG
• AUv3 plugin — load it as an instrument in GarageBand, AUM, Cubasis, Loopy Pro, and any AUv3 host
• Standalone app with background audio
• MIDI in and out, including Bluetooth MIDI
NO STRINGS
No account, no ads, no tracking, no data collected. Just voltage.
Ratings & Reviews
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The developer, James Hurlbut, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Seller
- James Hurlbut
- Size
- 7.3 MB
- Category
- Music
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Age Rating
4+
- 4+
- Copyright
- © 2026 SpreadsheetsLabs