A slow string section: two saws a few cents apart, each spread across the speakers, through a soft 12 dB ladder, a rich chorus and a bright plate. Hold chords' top notes and let each one bow in; move slowly between notes. The mod wheel adds a gentle vibrato. Macros: Attack, Bright, Chorus, Space. 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 it1–24 of 45
A hollow, reedy pad: osc 1's narrow pulse slowly widening and narrowing on the LFO, a quiet triangle under it, thinned by the HPF and set far back in a dark hall. Play slow, sustained notes in the middle of the keyboard. Macros: Motion, Cutoff, Hall. Macro 8, Master, is the output level.
Air with a note inside it: hybrid noise breathing under a soft saw and triangle, a gentle chorus and a warm hall. Play long notes and let the breath swell in; more Noise turns it into a whisper. Macros: Noise, Attack, Cutoff. Macro 8, Master, is the output level.
A drone that never stops: the VCA on Drone, so it sounds with no key down. A 32' saw and a 16' square through a low, resonant ladder that a very slow LFO opens and closes, each side a little apart, into a long hall. Play a key to set its pitch, then play over it on another instrument; turn VOLUME down to silence it. Macros: Motion, Cutoff, Spread. Macro 8, Master, is the output level.
A warm pad that thickens as it sustains: the finished voice fed back into its own mixer through EXT IN, so the two saws saturate and bloom against the ladder's resonance. Hold notes and listen to it grow; more Feedback makes it rawer. Macros: Feedback, Cutoff, Resonance. Macro 8, Master, is the output level.
A slow resonant sweep that takes fourteen seconds to come round: the LFO on the cutoff at its slowest, the two sides sweeping a little apart, into ping-pong echoes and a hall. Hold one note for a long time and let it evolve. Macros: Sweep Rate, Resonance, Echo. Macro 8, Master, is the output level.
A pad that swells up out of Big Red's springs: a saw with a quiet saw an octave above, its ladder opening with the slow attack and settling back, drenched in spring and a light chorus. Play slow chords' top notes and let each swell finish. Macros: Spring, Swell, Bright. Macro 8, Master, is the output level.
Every key an open fifth: a triangle and, a fifth above it, a soft saw, each spread across the speakers, in a wide, distant hall. Play single notes and slow movements for big, cinematic chords from one finger. Macros: Fifth, Bright, Space. Macro 8, Master, is the output level.
A wordless choir: a saw and a narrow pulse an octave up through the HPF into a resonant ladder, a band like a sung vowel, with a soft vibrato always on and a deep chorus. Play slow melodies or long notes; Vowel moves the band from 'oo' toward 'ah'. The mod wheel deepens the vibrato. Macros: Vowel, Air, Space. Macro 8, Master, is the output level.
A pad that rises and falls like slow waves: Undertow's lamp-soft tremolo, each side a little behind the other, over a saw and a square, into a hall. Hold notes and let them pulse; Rate takes it from a slow ebb to a shimmer. Macros: Rate, Depth, Space. Macro 8, Master, is the output level.
Two squares with the LFO patched into osc 1 PWM IN: a slow, always-moving pulse width that chorus-thickens a soft pad. The mod wheel adds PWM to osc 2 as well. Macros: Bright, Rate, Release. Macro 8, Master, is the output level.
A dark pad that slowly circles the room: a 16' triangle and a soft saw, chorused, then swayed from one speaker to the other by Undertow every four seconds, into a hall. Best on headphones or wide speakers; hold low chords' roots. Macros: Orbit, Cutoff, Space. Macro 8, Master, is the output level.
Glassy triangles an octave apart, frozen into a haze: a swirling chorus, deep wobbling ping-pong echoes and a near-endless hall. Play sparse, slow notes and let them pile up; Freeze stretches the hall to twenty seconds. A slow square LFO patched into Geode's HOLD freezes the echoes for half of every twelve seconds. Macros: Freeze, Echo, Haze. Macro 8, Master, is the output level.
A deep, soft pad for late at night: a 16' triangle under a saw, through a closed ladder with the gentlest chorus and a dark, distant hall. Play low, slow chords' roots and fifths. The mod wheel brings in a slow filter sway. Macros: Cutoff, Attack, Space. Macro 8, Master, is the output level.
A soft brass section swelling in: two saws through a closed ladder that the slow envelope opens brassy and lets settle, in a lightly chorused room. Play held chords' top notes, a little before the beat. Macros: Bloom, Attack, Space. Macro 8, Master, is the output level.
A pad off a worn cassette: a triangle and a saw with a slow wow on their pitch, a hiss of hybrid noise, gritty 12-bit echoes and a soft chorus. Play simple, nostalgic chords' top notes and let it drift. Macros: Wow, Hiss, Echo. Macro 8, Master, is the output level.
A pad you feel more than hear: a 32' and a 16' triangle, softly opening through the ladder, a narrow chorus that keeps the lows in the middle and a short-bassed hall. Play low, held notes under a track that needs weight. Macros: Cutoff, Attack, Space. Macro 8, Master, is the output level.
A wide wall of saws: each oscillator spread as far across the speakers as it goes, the two sides' cutoffs apart, the drift loose, through all three deeper chorus modes and a plate. Hold big notes, low or high, for a sound that fills the stereo field. Macros: Spread, Bright, Space. Macro 8, Master, is the output level.
A clear, glassy halo: a triangle with a quiet triangle two octaves up, the low end thinned, bright ping-pong echoes and a long shimmering plate. Play high, slow melodies and let the echoes ring. The mod wheel adds vibrato. Macros: Shimmer, Echo, Space. Macro 8, Master, is the output level.
Two saws detuned about 20 cents with extra drift, a slow attack and a long release, the ladder low and warm. The mod wheel brings in a slow filter sweep. Macros: Bright, Release, Bite. Macro 8, Master, is the output level.
A struck and held singing bowl: a triangle frequency-modulates a second triangle tuned to an uneven overtone, so every note rings with a metallic shimmer that settles into a soft hum, in a long hall. Play single notes and let each ring for several seconds; low notes sound like bigger bowls. Macros: Strike, Ring, Space. Macro 8, Master, is the output level.
Rain on a window: the sample and hold steps a resonant ladder to a new place seven times a second, so a held note glitters with bright, random overtones, scattered by ping-pong echoes into a plate. Hold long notes in the middle and upper keys. Macros: Rate, Glitter, Echo. Macro 8, Master, is the output level.
Slow northern lights: osc 2 hard-synced to osc 1 while a slow LFO sweeps its pitch, so the overtones rise and fall like a moving vowel over eight seconds, the two sides' filters a little apart, through a chorus and a hall. Hold one note and let it shimmer. Macros: Sweep Rate, Colour, Space. Macro 8, Master, is the output level.
Wind blown through organ pipes: pink noise into a ladder held just under self-oscillation and tracking the keys, so each note whistles at its pitch, with a quiet triangle under it for a core, in a long hall. Play slow melodies in the middle and upper keys; it breathes rather than sings. Macros: Whistle, Body, Space. Macro 8, Master, is the output level.
Hybrid
Modern