Bonedo Synthesizers: How to Make Any Synth Scream Acid Like a 303

First up, Basti from Bonedo Synthesizers gives us a crash course in the TB-303’s accidental rise to fame. Originally meant to be a bass guitar substitute, the 303 flopped so hard in its intended role that Roland pulled the plug after just a few years. But as digital synths took over in the late ’80s, these dusty boxes started popping up in the hands of broke producers looking for cheap analog dirt.

What happened next is the stuff of electronic folklore: acid house was born, and suddenly the TB-303’s weird sequencer and screaming filter became the backbone of an entire genre. Fast-forward to now and you’ll need to remortgage your flat to buy an original. Basti’s got no time for synth snobbery though—he’s here to show you how to get that squelch without selling a kidney.

Let’s get real: the TB-303 isn’t magic. Basti breaks down what actually matters—monophonic signal path, one oscillator (square or saw), a brutally resonant low-pass filter, and a sequencer that does slide and accent tricks. No secret sauce, just clever design.

The real voodoo comes from those sequencer features. Assigning accent ramps up the volume, filter envelope, and opens the cutoff, while slide lets notes melt into each other for that iconic rubbery flow. Turns out, most modern synths can fake these moves if you know what to tweak. It’s not about the badge—it’s about the behaviour.

Time for the details that make or break a 303 sound. Basti demonstrates how to map velocity to both filter cutoff and amp volume, mimicking the original’s accent behaviour. If your synth’s modulation matrix is halfway decent, you can set this up in seconds. Envelope modulation on the filter is the third pillar—tweak it until it snaps and pops.

Then comes the slide. With the Hydrasynth set to mono and the glide function engaged, those overlapping notes ooze together just like on the real deal. Fine-tune glide time for that sweet spot between subtle squelch and rubbery madness. As always, the real magic is in the tweaking—so if you want to hear the nasty details, you’d better watch the video for the full aural filth.