New iOS App, Super J8, Sounds Like A $30,000 Synthesizer

Developer Matthew Fecher (AudioKit Pro) shared this introduction to Super J8, a new iOS software synth that’s designed to sound like a $30,000 Roland Jupiter-8.

Fecher says that Super J8 was developed in part with the use of ‘ethical AI machine learning’. The oscillators were trained by recording hours of output from a vintage Jupiter-8. The mountains of data gathered by analyzing the hardware synth ‘powers’ the the oscillators in the app, creating analog-like variations in the tuning and other attributes that he says make the synth feel ‘alive’.

Other highlights include Oscillator Sync, Cross-Modulation, 2x Oversampling, True Per-Voice Poly Unison, PWM, Analog Voice Modeling, Analog Panning, Envelope Polarity, and Single-Note Polyphony.

Topics covered in the video include:

0:00 Intro, New Features!
1:32 2x Oversampling
1:56 True Per-Voice Unison, 64 Voices!
3:40 Single Note Polyphony
4:07 Analog Saturation
4:49 Oscillator Sync
5:48 PWM
7:16 Mixer Panel
7:31 Cross Mod (X-Mod)
9:31 Per-Voice Panning
10:19 Main Panel
13:38 Bonus LFOs
14:14 Envelope Panel (ADSR)
16:00 FX Panel
16:23 Easter Egg?!
17:16 WiP Presets Demo
19:23 Exclusive Presets (500+ Included!)

Features:

• New sound engine with advanced DSP
• 650+ presets included (more to come)
• True Poly Unison with unison start sync
• 64 voices – like a Jupiter-64! Play 8 notes with 8-voice unison.
• Raw, gritty Oscillator Sync
• J8-style cross-modulation plus frequency tracker
• Per-Voice Analog Panning
• Single Note Polyphony for notes & unison stacks
• 2x oversampling for more analog-style lows and highs
• PWM engine modeled after vintage hardware behavior
• FX: Reverb based on Sean Costello’s code (Valhalla plugins Plug-ins), Analog Tape Delay, Chorus, Crush, and more.
• 3 LFOs, over 60+ possible destinations. LFOs can even modify other LFOs.
• Dual Assignable Touch Pads, manipulate FX in real time
• Classic Arpeggiator & Vintage Style Step Sequencer
• ENV-1 Polarity & Dual Envelope ADSRs like original hardware
• Control it with a MIDI Keyboard, MIDI Learn to map your controls to the app
• Works as a Plug-in Instrument in GarageBand, Logic for iPad, AUM, etc

Pricing and Availability:

Super J8 is expected to be available Feb 12, with an intro price of $7.99 USD (normally $29.99).


Source: www.synthtopia.com/content/2026/02/06/new-ios-app-super-j8-sounds-like-a-30000-synthesizer/