The finger BassLine (App Store link) is a musical instrument for the iPhone and the iPod Touch that’s heavily inspired by the legendary Roland TB-303.
It turns your iPhone/iPod touch into a monophonic synthesizer with built-in pattern-based step sequencer, and it’s priced at a bite-sized $3.99.
Bassline doesn’t accurately duplicate a 303’s look or sound – but it does turn your iPhone into a bassline synth that can turn out some interesting acid sounds.
Synth section features include:
- Oscillator with two waveforms (sawtooth or square)
- Stable low-pass filter allowing high resonance values not leading to self oscillation
- Graphical representation of the filter parameters
Sequencer section features include:
- Individual pattern lengths (up to 64 sixteenths)
- Emphasized notes and pauses
- Smooth transition between notes
- Functions to clear, transpose, shift, and clone patterns
Live performance features:
- Realtime modulation of the filter parameters using the intuitive pad-controls
- Pattern switches take effect on downbeat