You know, when the word "Roland" appears in the same place where three-o-three, somehow you will meet a saturated saw bassline generator. Even if it comes from an effect machine. I don't get how did the engineers at Roland comes to this decision, because EF-303 is a good step-sequencing 20bit effect processor with 14 algorythm plus a DSP-based synthesizer. They meant this for an extension part to their MC-505 and JP-8080 tabletop synthesizers, namely suggest it with "Groove Effects" as this is from the same branch. It has a vocoder-like effect (VOICE), which funny and really cool. The modulation and delay effects (delays, phaser, flanger, chorus, etc) are good enough to radically change the sound, and it can get the BPM from the input signal. Finally, then you have SYN+DL and SYN BASS for synthesizers. The bass synthesizer is why this EF is "303", so you know, it's a TB emulation. SYN+DL is a fixed delay polysynth sound. Now I would ask, why? Because the bass synth sounds far from TB-303, the polysynth sound is boring. And top of all, you can control it by the slider-forest in the main part on the gear as a 16 step sequencer and each fader sets the note number. Not so easy to set a good phrase in realtime, however this machine built to make things right on the stage. Anyway, as an effect box it's intuitive and inspirative, but you will notice, it's really made for live performances, because in the studio, its sound quality fall behind the competitors.