Roland T-8 Aira Compact Beat MachineUltra portable rhythm and bass machine with genuine Roland sounds Six rhythm tracks with sounds from the influential TR 808, TR 909, and TR 606 drum machines Bass track with sawtooth square waveforms and hands on controls derived from the TB 303 Bass Line Analog Circuit Behavior (ACB) technology faithfully recreates the tonality and behavior of vintage Roland instruments Classic TR REC drum sequencer with 64 user patterns and up to 32 steps each