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.

265–288 of 313

BASSWide Drift Bass

A wide, unsteady analog bass: each oscillator and the cutoff part left and right, and extra drift, so it shimmers across the speakers. For synthwave and slow, held lines; it narrows to a plain bass in mono. Macros: Width, Drift, Cutoff. Macro 8, Master, is the output level.

wide · stereo · analog · drift
LEADBig Mono Lead

The fat solo lead: two saws, one an octave down and a little detuned, pushed into the mixer's soft clip and through a resonant ladder that tracks the keys. Play single-note lines and lean on held notes; overlapping notes glide, the mod wheel adds vibrato. Macros: Bright, Bite, Vibrato, Glide, Room. Macro 8, Master, is the output level.

classic mono · fat · detuned · mod wheel
LEADHollow Square Lead

Two squares an octave apart through the gentler 12 dB slope: a hollow, woody lead with a little chorus around it. Clean, singable melodies sit well here; the mod wheel adds vibrato. Macros: Bright, Chorus, Vibrato, Release. Macro 8, Master, is the output level.

classic mono · square · hollow · mod wheel
LEADWoolly Fuzz Lead

A saw and a narrow pulse into Puzz's germanium fuzz, with a short slap echo behind: thick, ragged and sustaining, like a fuzz guitar solo. Hold notes and let them bloom; Cleanup rolls the fuzz back for a clearer verse. Macros: Fuzz, Cleanup, Echo, Bright. Macro 8, Master, is the output level.

fuzz · gritty · sustaining · mod wheel
LEADAmp Stack Lead

A square with a saw an octave above it, into Crank's amp with its mids filled in: a thick, forward rock lead that bites harder the harder you play the filter. Play bluesy lines and bend into notes. Macros: Gain, Tone, Bright, Room. Macro 8, Master, is the output level.

driven · rock · thick
LEADNasal Reed Lead

A narrow pulse squeezed between the high-pass filter and a resonant 12 dB ladder: a thin, reedy lead like a double reed. Mix Out runs through the HPF into the ladder. Play it legato in the middle register; the mod wheel adds vibrato. Macros: Nasal, Bright, Vibrato. Macro 8, Master, is the output level.

classic mono · nasal · reedy · patched · mod wheel
LEADBreath Flute Lead

A soft triangle with hybrid noise breathing under it, a slow swell and a gentle vibrato that is always on, in a bright plate: a flute-like lead. Play slow, legato melodies and let each note bloom. Macros: Breath, Air, Attack, Space. Macro 8, Master, is the output level.

flute · breathy · soft · vibrato · patched
LEADGrit Flutter Lead

A saw over a square sub, a resonant ladder jittered by sample-and-hold into its cutoff, and Zest's dirt on top: a gritty, restless lead that never sits still. Hold notes to hear the flutter; Flutter speeds the random steps up. Macros: Flutter, Bite, Dirt, Bright. Macro 8, Master, is the output level.

classic mono · gritty · sample and hold · patched
LEADCathedral Glide

The big prog portamento lead: two saws an octave apart that glide on every note, a slow swell, then echoes ping-ponging into a long hall. Play wide leaps slowly and let the glide carry you; add vibrato with the mod wheel on the held notes. Macros: Glide, Vibrato, Bright, Space. Macro 8, Master, is the output level.

prog · glide · epic · mod wheel
LEADAria Lead

A singing saw lead with a gentle attack, a vibrato that is always on, and a slide between overlapping notes: an operatic, vocal line. Play legato and slow, and let each note swell into its vibrato. Macros: Attack, Bright, Glide, Chorus. Macro 8, Master, is the output level.

singing · vibrato · glide · patched
LEADLonely Whistle

A pure triangle up high with a lazy vibrato and a slow slide, echoing into a hall: a whistled tune across an empty landscape. Play sparse melodies in the upper middle of the keyboard, overlapping notes to slide. Macros: Glide, Echo, Space. Macro 8, Master, is the output level.

whistle · pure · vibrato · glide · patched
LEADFifth Glide

Two saws a fifth apart, sliding together between overlapping notes, through a rich chorus: a big parallel-fifths lead. Play simple melodies and let the fifths do the harmony; the mod wheel adds vibrato. Macros: Glide, Fifth, Chorus, Bright. Macro 8, Master, is the output level.

fifths · glide · wide · mod wheel
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