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.

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 claimOpens: 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
The gallery
Every side of the panel, as the plugin draws it265–288 of 313
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Hybrid
Modern