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 Hardware theme

Hardware

The panel as a piece of gear: bat levers, round arcade buttons, gripped knobs on a printed plate.

25–48 of 55

LEADGlass Square Glide

A square with a soft triangle sub, gliding on every note, through an 18 dB filter and clean ping-pong echoes: a glassy, smooth portamento lead. Play flowing lines; the echoes bounce between the speakers. The mod wheel adds vibrato. Macros: Glide, Echo, Bright, Vibrato. Macro 8, Master, is the output level.

prog · square · glide · mod wheel
LEADVintage Warble

A saw and a triangle with a steady vibrato, extra drift and a harmonic tremolo swirling under it: a wobbly, old-tape kind of lead. Play slow, held notes and let the vibrato and the tremolo cross. Macros: Tremolo, Drift, Bright. Macro 8, Master, is the output level.

vibrato · tremolo · wobbly · vintage · patched
LEADWhammy Lead

Two wide saws into Crank's amp turned up, with a slap echo: a screaming rock lead whose pitch wheel bends a whole octave. Hold a note and dive or scream with the pitch wheel; the mod wheel adds vibrato. Macros: Gain, Echo, Bright, Vibrato. Macro 8, Master, is the output level.

driven · rock · bend · mod wheel
LEADSync Scream

Osc 2 hard-synced an octave up, the envelope tearing it down from about 21 semitones higher on every note, into a touch of fuzz: an aggressive, vocal sync lead. Play short, punchy phrases to hear each tear; hold notes for the settled tone. Macros: Fuzz, Decay, Bright, Space. Macro 8, Master, is the output level.

sync · aggressive · bright · patched
LEADSlow Sync Sweep

Osc 2 hard-synced and swept slowly up and down by the LFO, which restarts on every new note: a lead whose tone keeps turning over, vowel to vowel. Hold long notes to hear the sweep; Rate speeds it up. Macros: Rate, Chorus, Echo, Bright. Macro 8, Master, is the output level.

sync · sweep · evolving · patched
LEADTouch Sync

A hard-sync lead played by touch: velocity sets how high the synced osc 2 sits, and a short envelope snaps it down on every note. Play soft for a round tone and dig in for a bright tear. Macros: Bright, Decay, Space. Macro 8, Master, is the output level.

sync · velocity · expressive · patched
LEADMetal Sync

A square synced two octaves up and a few semitones off, through a 12 dB filter, a deep chorus and wide echoes: a hard, metallic, ringing lead. Play sparse, high notes and let the chorus and echoes shimmer. Macros: Bright, Chorus, Echo, Pitch. Macro 8, Master, is the output level.

sync · metallic · bright · wide
LEADSync Horn

A synced osc 2 under a filter that swells open with a slow attack: a brassy, blaring sync lead, evened out by Zest and set in a hall. Play slow, held notes and let each one swell; short notes give a horn stab. Macros: Attack, Bright, Space. Macro 8, Master, is the output level.

sync · brassy · swell · patched
LEADRising Sync

A sync lead whose tone follows the keys: KB OUT pushes the synced osc 2 higher the higher you play, and a slide between overlapping notes sweeps the sync tone with it. Play across the keyboard and slide between notes. Macros: Glide, Bright, Echo, Space. Macro 8, Master, is the output level.

sync · glide · keytracked · patched
LEADFM Reed Lead

Osc 1 into osc 2's linear FM input at the same pitch: a buzzy, clarinet-like reed whose tone breathes slowly as the two drift. Play woodwind lines in the middle of the keyboard; the mod wheel adds vibrato. Macros: Bright, Breath, Vibrato, Space. Macro 8, Master, is the output level.

fm · reedy · woody · patched · mod wheel
LEADChorus PWM Lead

Two squares whose widths sweep slowly, the LFO always on osc 1's pulse width, through a wide chorus: a lush, shimmering mono lead. Play held notes and smooth lines; the mod wheel adds vibrato. Macros: Sweep, Chorus, Bright, Glide. Macro 8, Master, is the output level.

classic mono · pwm · lush · patched · mod wheel
LEADOvertone Scream

Two saws through a ladder held just under self-oscillation and tracking the keys 1:1, so a whistling overtone screams over every note, with Eagle holding the peaks level. Play held notes high on the keyboard and lean on them; the mod wheel adds vibrato. Macros: Scream, Bright, Vibrato, Space. Macro 8, Master, is the output level.

screaming · resonant · whistling · mod wheel
LEADFeedback Howl

A saw over a square sub with EURO OUT patched back into the mixer's EXT IN: the voice feeds on itself, so held notes thicken and start to howl like an amp turned toward its speaker. Play long, held notes and let the howl build; Howl turns the feedback up; Squash takes the compressor from a gentle hold to crushed, never quieter. Macros: Howl, Bright, Vibrato, Space, Squash. Macro 8, Master, is the output level.

screaming · feedback · unstable · patched · mod wheel
LEADScoop Wail

A dirty saw-and-square lead that scoops up into every note from about two semitones under, like a singer or a bent string, its brightness blooming and settling as it lands. The VCA is on KB Rls, so the note holds while the envelope shapes only the scoop and the filter. Play bluesy phrases; the mod wheel adds vibrato. Macros: Scoop, Dirt, Bright, Vibrato. Macro 8, Master, is the output level.

screaming · scoop · bluesy · patched · mod wheel
LEADScooped Fizz

A saw and a narrow pulse an octave up into Crank's Mod amp with its mids scooped right out: a hollow, fizzy, cutting lead that sits on top of anything, with a short slap echo. Play fast runs and screaming held notes up high. Macros: Gain, Mids, Bright, Echo. Macro 8, Master, is the output level.

screaming · fizzy · driven · mod wheel
LEADPiercing Octaves

A saw with a narrow pulse two octaves above it, its lows cut away by 8 Ball and a hard lift at 3 kHz, squeezed flat by Zest: a thin, piercing lead that cuts through a dense mix. Play melodies in the middle of the keyboard; it reads an octave higher than it is. Macros: Pierce, Bright, Vibrato, Echo. Macro 8, Master, is the output level.

screaming · piercing · thin · mod wheel
LEADTrill Scream

Two bright saws with Eagle on them and a square-wave LFO on the pitch: push the mod wheel up and every note trills, a fast rock-guitar flutter between two pitches. Hold a note and roll the wheel up to trill it; Trill Rate and Trill Width set the flutter. Macros: Trill Rate, Trill Width, Bright, Space. Macro 8, Master, is the output level.

screaming · trill · rock · mod wheel
LEADDoom Wall Lead

Two saws an octave lower than usual, wide apart, into Crank's stock amp on its Dark voice: a heavy, woolly wall of a lead in a big room. Play slow, heavy lines low and in the middle of the keyboard and let the notes ring. Macros: Gain, Tone, Bright, Space. Macro 8, Master, is the output level.

driven · doom · heavy · dark · mod wheel
LEADWah Fuzz Lead

A saw and a square through a resonant ladder rocked by the LFO like a wah pedal, restarting on every note, into Puzz's fuzz: a vocal, quacking fuzz lead. Play slow, bluesy notes and hold them to hear the wah rock. Macros: Wah Rate, Quack, Fuzz, Space. Macro 8, Master, is the output level.

fuzz · wah · vocal · patched
LEADSputter Fuzz

Two squares into Puzz with its battery running flat: the fuzz gates and sputters as each note dies away, broken and spitting. Play short, staccato phrases and let the tails crackle; Battery puts a fresh one in. Macros: Battery, Fuzz, Echo, Bright. Macro 8, Master, is the output level.

fuzz · sputtery · gated · lo-fi
LEADRusty FM Fuzz

Osc 1 frequency-modulating a saw an octave above it, into Puzz: a grinding, metallic fuzz with a clang in its attack. Play riffs and held notes in the middle of the keyboard; Rust pulls the FM ratio off true for a harsher, clangier grind. Macros: Rust, Fuzz, Bright, Space. Macro 8, Master, is the output level.

fuzz · fm · metallic · patched · mod wheel
LEADRadio Fuzz

A narrow pulse into Puzz, then squeezed through 8 Ball into a narrow band from 400 Hz to 3.4 kHz: a fuzz solo heard over a small radio. Play hooky single-note lines; Band opens the radio out to full range. Macros: Fuzz, Band, Bright, Room. Macro 8, Master, is the output level.

fuzz · lo-fi · radio · mod wheel
LEADVelvet Fuzz

A saw and a soft triangle an octave up into Puzz with its volume knob rolled back, so the fuzz is smooth and velvety, swirled by Undertow's harmonic tremolo in a hall: a '60s psychedelic lead. Play slow, singing lines and let the swirl move under held notes. Macros: Cleanup, Swirl, Rate, Space. Macro 8, Master, is the output level.

fuzz · psychedelic · swirl · mod wheel
LEADBuzzsaw Lead

Two saws a quarter of a semitone apart into Puzz flat out, then Eagle clamping it into a solid wall: a raw, buzzing, sustaining fuzz lead. Play power lines and held notes; Detune pulls the saws further apart for a wider rasp. Macros: Fuzz, Detune, Bright, Space. Macro 8, Master, is the output level.

fuzz · buzzy · sustaining · mod wheel