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Tonic Synth by Rubens Felicio (Released)
https://apps.apple.com/app/id6783345229
Tonic is an analog-modeling synthesizer that runs three ways: as a standalone instrument and as two Audio Unit (AUv3) plug-ins — an instrument and an insert filter effect — for your favourite host on iPhone, iPad, and Mac.
THREE LAYERS, ONE SOUND
Stack up to three independent layers, each with its own source, filter, envelope, and modulation — from a simple patch to a thick, detuned stack with a single spread knob.
SOUND SOURCES
Physical models (plucked string, modal/struck, wind, bowed), virtual-analog oscillators (sine, saw, square, triangle, pulse, and super-saw, with sub-oscillator and noise), and a 16-table wavetable engine.
A FILTER WITH CHARACTER
Eight analog-modeling voicings — LP/HP/BP/Notch, 12 or 24 dB/oct, resonance up to self-oscillation, drive, and selectable oversampling (Auto/1×/2×/4×).
MOVE IT
A tempo-syncable LFO, an envelope follower (auto-wah), a note-triggered filter ADSR, pitch-bend and mod-wheel.
EFFECTS
Chorus, ping-pong / tempo-synced delay, FDN reverb (6 types), 3-band EQ, compressor, flanger, and bitcrusher — on the final chain.
MADE TO PLAY
Editable presets, MIDI Learn on any control, an on-screen keyboard, and a UI that adapts to your screen — from iPhone to Mac.
PRIVATE BY DESIGN
100% on-device. No account, no tracking, no network. One-time purchase, no surprises.
Details:
Universal: Yes
Minimum OS version: 17.0
Comments
bargain!
Wow! Must be, it has “THREE LAYERS, ONE SOUND”!!!!
And a “note-triggered filter ADSR” as well 🤩
$35...but hey it's "private by design' and 'made to play'. Dang, it even has 'editable presets', holy moly
I come for the deals but stay for the sarcasm lol
Hold on folks, don't be so harsh. You can change the pitch of the oscillators. That's worth $20 on its own right there 👍
That spread knob had me spreading my wallet
I'm beginning to think these things aren't just vibe-coded and LLM-described, but actually completely authored and deployed by frackin' AIs.
Like the look of the GUI but that's very expensive for an IOS synth
“Hello I am Smith Comma John please buy my new app Synthia CLR— a living breathing synthetic organism unlike no other a port adieu or die.
OSCILLATING SOUND — Sound sounds good and it passes through a living breathing filter until it sounds like baby pigeons singing in perfect harmony .
LIVING BREATHING SOUND — Sound can be manipulated into esoterica magical mysteries using a revolutionary ASDR envelope.
LIQUID SOUND — Columnated Ruins Domino
Free to download — Pro features such as 1DB filter and resonance knob available for $35.99
AUV3 coming upon return of Halley’s Comet . “
$35 for something that isn't even AUv3? F that. 🤣
It says AUV3 in the first sentence 😱
Wait it does? It does! What the hell was in that edible I took last night? 😆
Okay, so @thesoundtestroom , will you test it? 😅
The Developer posted a demo on his web site
https://www.rsjb.com.br/videos/tonic-demo.mp4
The middle bit of music sounds like those cheesy generic instrumental albums (Music for Pleasure?) they used to sell back in the day.....The worrying thing is I actually quite like it now...!!
That demo sounds nice, but as I was listening, I thought to myself "I already have synths that can make those exact sounds".
Gonna have to pass.
Ah, you mean 'library music' maybe?

Great vid on that here:
There's a cool compilation album "Further Nuggets" curated by Luke Vibert.

Check out the track Exotica, so good:
Haha, never heard of Library music, some of these are great...no I was meaning ones with titles like Sound of Pan pipes or Sensual sax covers...that kind of thing. :-)
Ah OK, now I understand why you feel sheepish about liking them 😂😂
Library Music is a goldmine for crate diggers and sound collagists. Lots of wheat among the chaff. Pretty interesting history, too. It’s a bottomless reservoir of music and sound effects whose reason for existence is to be repurposed.