Device Overview

TB-03 Bass Line

The TB-03 is Roland’s modern recreation of the iconic TB-303 Bass Line synthesizer using ACB (Analog Circuit Behavior) technology. It faithfully captures the sound character that defined acid house and techno music since the 1980s.

Key Features

• Single oscillator bass synthesizer with square and sawtooth waveforms
• Classic 18dB low-pass filter with resonance
• Step sequencer with pattern memory
• Overdrive effect for classic acid sounds
• Delay and reverb effects
• 24-bit/96kHz USB audio interface capability

Connections

Physical Inputs

• MIDI In (1 channel)
• Mix In (Audio)
• Trigger In (CV)

Physical Outputs

• MIDI Out (1 channel)
• Audio Out (1/8” stereo mini jack)
• Trigger Out (CV)

USB Connection

• USB 2.0 Type Micro-B
• 1 MIDI channel
• 2 Audio outputs (stereo)

Sound Design Tips

Classic Acid Bass

• Waveform: Sawtooth
• Cutoff: 30-50
• Resonance: 70-100
• Envelope Mod: 50-70
• Decay: 40-60
• Accent on strategic notes
• Add overdrive for aggressive tone

Smooth Subby Bass

• Waveform: Square
• Cutoff: 20-40
• Resonance: 0-20
• Envelope Mod: 10-30
• Decay: 80-100
• Minimal or no accent
• Use subtle delay for space

Pattern Programming

The TB-03 features a faithful recreation of the original TB-303’s pattern creation system, with some modern additions:

1. Pattern Mode: For creating and editing patterns
2. Track Mode: For arranging patterns into a song
3. Real-time recording: Input notes in real time with a keyboard or the built-in step buttons
4. Step recording: Program each note individually with rest, tie, and accent parameters

Notes

• Part of Roland’s Boutique series of compact synthesizers
• Original TB-303 was produced from 1982-1984
• Initially designed as a bass accompaniment for guitarists, but found its true calling in electronic dance music
• The “acid” sound comes from the unique behavior of its resonant filter, especially when sweeping the cutoff frequency
• Battery powered (4 x AA) or USB powered
• Can be mounted on the DK-01 Boutique Dock (sold separately) for increased stability