A hard square edge.
Pulsing and tight, the kind of bass that drives tech house and techno. It is built to sit underneath a drum pattern rather than to be played on its own.

A pulsing tech-house bass with a hard square edge.
No MIDI keyboard? Play with your computer keys: bottom rows are the lower octave, top rows the higher one. Hold Shift to sustain. ← → octave, ↑ ↓ semitone.
Virtual bass synth
Pulsing and tight, the kind of bass that drives tech house and techno. It is built to sit underneath a drum pattern rather than to be played on its own.
Work out a line here, then open the Drum Machine and hear what it sits against. Both run on the same engine, and a pad controller plays either over MIDI.
Synthesized rather than recorded, so there is nothing to download and it plays the moment the page opens. No account, and no ads on the instrument.