"Doctor 33 is a strange little creation from those
funky folk at Boss. Unlike its big brothers, the
Doctor 55 and Doctor 110 beatboxes, Doctor 33 isn’t
a drum machine – it’s a metronome. Still, it creates
a variety of little analogue clicks, blips and ticks
which have a fun percussive style of their own; it
hosts four combinable onboard rhythms, which we’ve
tempo-synced to your host DAW (these include
triplets, which can be rather cool); and we’ve
grafted on a “Tone” control which actually brings a
strongly resonant gritty-sounding filter to bear on
the metronome sounds. Sweep this while the rhythms
are playing and you can get some odd, engaging
effects going, particularly if you layer it over a
proper drum beat.
The percussive sounds can be level-adjusted and
panned, and played along with the onboard rhythms if
you wish. All in all, Doctor 33 is a neat little box
for adding some analogue oddness to the background
of your beats."
The library is a free download at Rhythmic Robot.