Sweet Berta's panel

Semi-modular monophonic synth

Sweet Berta

One voice, patched your way. Two oscillators, a ladder filter, a sequencer and an arpeggiator, a patch bay of cables, and a spring reverb.

The launch

Free to claim

Opens: October 21, 2026 at 12:00 AM UTC. No closing date yet.

Sweet Berta installs with the Ozner Audio app and a free account. Get the app

AUVST3Standalone

The gallery

Every side of the panel, as the plugin draws it
The Front

The Front. Macros, the Case, the synth's modules, the Pedalboard and the keyboard, in the Hardware theme.

Three looks

Settings › Theme, any time: the sound never changes
The Front in the Hybrid theme

Hybrid

Slide switches, keycaps and knurled knobs: gear drawn flatter, still with a hand on it.

1–24 of 55

KEYS/PLUCKGlass Saw Pluck

The classic synth pluck: two saws a hair apart snapping shut through the 24 dB ladder, with a little resonance on the snap and a bright plate behind it. Play quick off-beat chords and arpeggios; harder notes open brighter. Macros: Ring, Bright, Space. Macro 8, Master, is the output level.

pluck · bright · classic · patched
KEYS/PLUCKPing-Pong Pluck

A round, woody square pluck at 12 dB that bounces from side to side: delay 1 answers on the left, delay 2 on the right a golden ratio later. Play sparse notes and leave room for the echoes to fill the gaps. Macros: Echo, Feedback, Bright, Decay. Macro 8, Master, is the output level.

pluck · echo · stereo · round · patched
KEYS/PLUCKChorus Pluck

A glossy, wide '80s pop pluck: saw and square through a gentle filter snap and a deep studio chorus spread past the speakers. Play bright chord stabs and quick sixteenth figures. Macros: Chorus, Bright, Decay, Space. Macro 8, Master, is the output level.

pluck · chorus · wide · eighties · glossy
KEYS/PLUCKNylon Pluck

A soft, nylon-string pluck: a triangle with a little saw for the string, a breath of pink noise for the fingertip, and a 12 dB filter closing as the note rings out in a wooden room. Play fingerpicked lines and broken chords; soft notes stay mellow. Macros: Ring, Tone, Finger, Room. Macro 8, Master, is the output level.

pluck · guitar · soft · woody · patched
KEYS/PLUCKBright Harpsichord

A plucked, jangling harpsichord: a saw for the 8' string and a narrow pulse an octave up for the 4', thinned through the high-pass filter, each note ringing out and damped fast on release. Play ornamented lines and running baroque figures. Macros: Thin, Jangle, Ring, Hall. Macro 8, Master, is the output level.

harpsichord · baroque · bright · patched
KEYS/PLUCKFunk Clav

A bright, quacking clav: two narrow pulses through a resonant envelope snap, the lows trimmed by the high-pass filter and squeezed even. Play tight sixteenth-note rhythm parts and lift off quickly; dig in for more quack. Macros: Quack, Thin, Squeeze, Decay. Macro 8, Master, is the output level.

clav · funky · percussive · patched
KEYS/PLUCKMuted Clav

The clav with a felt mute on: a pulse and a triangle thumping short and round, all attack and no ring. Play choppy, syncopated comping under a groove, low in the keyboard. Macros: Open, Length, Bite. Macro 8, Master, is the output level.

clav · muted · funky · percussive
KEYS/PLUCKDrawbar Organ

A clean drawbar organ: two triangles at 8' and 4' with a quick key click, full while held and gone when you let go, spinning through a fast rotating-speaker swirl. Play legato chords and bluesy right-hand lines. Macros: Spin, Click, Upper, Room. Macro 8, Master, is the output level.

organ · drawbar · rotary · classic · patched
KEYS/PLUCKCombo Organ

A thin, reedy '60s combo organ: a square and a saw an octave up, buzzing through a bright filter and a choppy tremolo. Play stabbing garage-rock chords and a wiry riff high up. Macros: Tremolo, Reed, Speed. Macro 8, Master, is the output level.

organ · combo · reedy · sixties · tremolo
KEYS/PLUCKOverdrive Organ

A gritty rock organ: drawbar triangles at 16' and 8' pushed into a dirty squeeze, with a slow rotating swirl you can kick up to speed. Play heavy sustained chords and growling low riffs. Macros: Dirt, Spin, Growl, Room. Macro 8, Master, is the output level.

organ · overdrive · rock · rotary
KEYS/PLUCKTine Keys

A bell-toned electric piano: osc 1 frequency-modulates osc 2 at the same pitch for the struck tine, the filter closing as each note fades, the sides swaying in a slow stereo tremolo. Play soft, jazzy chords and let them ring; harder notes bark. Macros: Bark, Sway, Ring, Space. Macro 8, Master, is the output level.

electric piano · fm · mellow · tremolo · patched
KEYS/PLUCKReed Keys

A buzzy reed electric piano: a triangle and a soft square pushed into the mixer until they growl, through a bright velocity filter and a gentle volume tremolo. Play soulful two-hand comping; dig in and it snarls. Macros: Snarl, Tremolo, Tone, Room. Macro 8, Master, is the output level.

electric piano · reedy · tremolo · soulful · patched
KEYS/PLUCKPWM Keys

Warm, shifting square keys: the LFO slowly sweeps osc 1's pulse width against a steady square, and a chorus spreads them wide. Play held chords and slow melodies; the tone keeps moving under your hands. Macros: Motion, Chorus, Bright, Release. Macro 8, Master, is the output level.

pwm · warm · chorus · analog · patched
KEYS/PLUCKWorn Tape Keys

Soft keys off an old cassette: two triangles with a slow wow on their pitch, a hiss of hybrid noise, and gritty, wobbling echoes. Play simple, nostalgic chords and lazy melodies. Macros: Wow, Hiss, Echo, Tone. Macro 8, Master, is the output level.

lo-fi · tape · soft · nostalgic · patched
KEYS/PLUCKWood Marimba

A warm wooden marimba: a triangle struck by its own fourth harmonic through linear FM, the bar's knock dying fast into a round tone, in a small hall. Play bouncing mallet patterns and rolled chords in the middle of the keyboard. Macros: Knock, Ring, Mallet, Hall. Macro 8, Master, is the output level.

mallet · marimba · woody · fm · patched
KEYS/PLUCKMotor Vibes

A vibraphone with its motor on: soft triangles ringing long, a quiet octave above for the metal, and a round volume pulse from the spinning fans. Play cool jazz voicings and slow melodies and let them ring. Macros: Motor, Depth, Ring, Hall. Macro 8, Master, is the output level.

mallet · vibes · tremolo · jazzy
KEYS/PLUCKChapel Bell

A deep tubular bell: osc 1 modulates osc 2 at an inharmonic 3.5 to 1, so each strike blooms with clangy overtones that fade into a long hum in a big hall. Play single notes and slow fifths low down, and let every strike ring. Macros: Clang, Ring, Hall. Macro 8, Master, is the output level.

bell · fm · inharmonic · patched
KEYS/PLUCKMusic Box

A tiny wind-up music box: high triangle tines plucked by a faintly inharmonic FM shimmer, small and sweet, in a plate. Play lullaby melodies in the upper half of the keyboard. Macros: Shimmer, Ring, Space. Macro 8, Master, is the output level.

bell · music box · sweet · fm · patched
KEYS/PLUCKKalimba

A thumb piano: a triangle tine with a bright FM ping at 3 to 1 on its strike, decaying quickly into a round, woody tone in a small room. Play pentatonic patterns and interlocking ostinatos. Macros: Ping, Ring, Room. Macro 8, Master, is the output level.

thumb piano · plucked · woody · fm · patched
KEYS/PLUCKSync Pluck

A biting, vocal pluck: osc 2 hard-synced to osc 1, the envelope sweeping its pitch down through the harmonics on every note, with a quick dotted echo. Play staccato hooks and sharp off-beat stabs. Macros: Sweep, Decay, Echo, Bright. Macro 8, Master, is the output level.

pluck · sync · biting · patched
KEYS/PLUCKSteel Pan

A bright, singing steel drum: a triangle struck by osc 1 at three times its pitch, so the octave and the twelfth bloom out of every hit and fade into a round hum, with a quick wobble on the strike. Play bouncy calypso melodies and quick rolls in the middle of the keyboard; harder hits ring brighter. Macros: Ring, Shine, Roll, Space. Macro 8, Master, is the output level.

steel pan · caribbean · bright · mallet · fm · patched
KEYS/PLUCKWater Drops

Drops falling into a still pool: a pure triangle whose pitch leaps up into the note on every strike, a liquid plip, echoing from side to side in a cave. Play sparse single notes high up and let the echoes answer; a quick run sounds like a dripping tap. Macros: Echo, Cave, Length. Macro 8, Master, is the output level.

water · drops · liquid · echo · stereo · patched
KEYS/PLUCKHandpan

A soft, warm hand-played steel tongue: a triangle with an octave overtone, struck gently with the fingers and left to hum for seconds in a wide, calm hall. Play slow, meditative melodies over a low root, letting each note ring into the next. Macros: Ring, Overtone, Warmth, Hall. Macro 8, Master, is the output level.

handpan · meditative · soft · warm · fm · patched
KEYS/PLUCKGamelan Bars

Bronze bars tuned in pairs a little apart, as a gamelan is, so every note shimmers with a slow beating wave; the two triangles also modulate each other for a metallic edge on the strike. Play interlocking patterns on a few notes and let the beats ring out. Macros: Shimmer, Bronze, Ring, Hall. Macro 8, Master, is the output level.

gamelan · metallic · shimmering · mallet · patched