Friday, July 03, 2026
FAT Freebass FB383 analogue synth tutorial, review, sound demos: is this a good Roland TB-303 clone?
video upload by ako
"I've been really liking the FAT Freebass FB383 analogue TB303 clone again (even if staying in tune is more of an aspiration than guarantee with this thing). It’s fully analogue and the filter does all the good self oscillating squelchy things you want from a 303 even if it does lack a sequencer (slides and accents can be triggered with MIDI). Some sources claim it's a fairly faithful clone of a TB-303, not sure how valid that is though. For those outside the UK wondering, this synth is just a MAM MB33 with a different paint job. You can also feed audio into this synth and use it as a MIDI triggered enveloped / gated filter, which is kinda cool! Had this set up recently for some acid parts (ofc) and it’s been fun using this synth again so I thought I'd make a video on it - hope you enjoy :)
Chapters:
00:00 - review, background info and basic features (incl. how it differs from a "real" 303 and other clones)
07:58 - Programming sounds (pt1. VCO and tuning)
10:20 - Programming sounds (pt2. filter and envelope)
12:24 - Programming sounds (pt3. Accent and slide)
15:47 - Programming sounds (pt4. Using the filter's external audio input)
21:07 - Sound demo 1 - the synth in a track with no effects on it
23:02 - Sound demo 2 - the synth used in a track through an overdrive pedal
Sound demo 2 is a verison of my 'MYST.wave II Unfinale':
https://ako0.bandcamp.com/track/myst-...
https://open.spotify.com/track/2Y6bqI...
some more info on mods:
https://www.circuitbenders.co.uk/synt..."
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© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH
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