Roland Aira Bitrazer review

That crushing feeling...

  • £245
  • €299
  • $299
Roland Aira Bitrazer (left)

MusicRadar Verdict

A small and flexible processor that goes beyond what some simpler units can do.


  • +

    Works well for drums.


  • -

    Not an essential part of Roland's Aira range. Lack of information in owner's manual.

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Roland's Aira onslaught continues, with the company putting out four new effects boxes - the Bitrazer, Demora, Torcido and Scooper.

Today we're looking at the Bitrazer, the bitcrusher of the pack.

As with all other elements in the Aira range, this product utilises digital process (at a sample rate of 96kHz) and comes armed with audio interfacing capabilities courtesy of its USB port.

Like the recent System-1m, the unit also features a plentiful supply of analogue ins and outs that embrace both audio and CV control, and the ability to integrate comfortably into a Eurorack modular system.

The unit's front panel is dominated by two large Moog-style knobs. Next to each is a smaller knob to adjust the amplitude of external CV signals (plugged into the adjacent 3.5mm socket). The associated LED's brightness is used for visual feedback.

A couple of sub-parameters get their own mid-size controls. These can also come under external control, but this time any CV scaling needs to happen before arriving at the unit. Two switches provide simple additional parameter or bypass on/off features, with a couple of mini-jack inputs for Gate control.

Things are rounded off with global Volume, two mono inputs and outputs and the mysterious Remote In.

As with the System-1m this box arrives with its own PSU for desktop use, but you'll also find a Eurorack power connector and four screws for racking. As such, the only connector on the rear is for USB connection to your computer.

As with all other units in the range, this handles both MIDI, audio and system updates. The box itself can also be used for general audio interfacing duties, though once again the 96kHz sample rate is fixed and Roland is not especially clear about what the ten in/out audio ports on your computer are actually routed to.

None of this is explained in the semi-generic two page owner's manual - in fact, nearly everything about using the unit is given only a cursory explanation. We understand that digital kit updates often push manuals out of date pretty quickly, but Roland's approach certainly doesn't help you get the best out of a new box of tricks.

The Bitrazer is a bit-rate and sample-rate reducer combined with a resonant filter. There is something decidedly counterintuitive about a high-quality audio engine such as this being used to emulate low-res digital conversion.

That being said, it does the job pretty well, and works particularly nicely on drums. As before, you can roll your own variations via software - though, we wonder if this particular effect really warrants its own hardware variant in the range.