RiffNode

A guitar effects studio built entirely from native Apple frameworks, selected as an Apple WWDC26 Swift Student Challenge Winner (one of 8 in Taiwan, 350 worldwide). Pedals drag into a signal chain laid out like a real board — guitar and cable, pedals, amp, cabinet — and the Signal Lab draws each pedal's input against its output live, so distortion flattening the peaks or a flanger's comb of notches becomes something you can see.

Eleven effect types run on AVAudioEngine, the waveshapers and modulation in a custom in-process Audio Unit; twenty classic stompboxes and five amps are voiced after how their circuits work, the cable is modelled as a resonant low-pass, and a Swift port of Neural Amp Modeler's WaveNet on Accelerate matches the reference renderer at 132–135 dB SNR.

The Tone Assistant turns a described sound into a board with Foundation Models — every value clamped to its parameter range before it reaches the DSP — and labels when an offline matcher answered instead. Vision face tracking makes it hands-free: nod to change presets, open your mouth for a wah. No account, no network: audio, camera frames and prompts never leave the device.