tripod-waveform

# TRIPOD WAVEFORM ### Mobile-First XY Pad Synthesizer > Touch the pad. X = frequency. Y = amplitude. Play anything. Two standalone HTML files. No dependencies. No build step. Open in browser. **Author:** David Lee Wise (ROOT0) / TriPod LLC **License:** CC-BY-ND-4.0 --- ## Files | File | Description | |------|-------------| | `waveform-v2.html` | **Current** — multitouch, 4-voice polyphony, full FX chain, 3 viz modes | | `waveform-v1.html` | Original — single-touch, clean, lighter weight | --- ## How to Use 1. Open `waveform-v2.html` in a browser (Chrome / Safari) 2. Touch and drag on the pad: - **Left → Right** = frequency (A1 at 55 Hz → C7 at 2093 Hz) - **Top → Bottom** = amplitude (loud at top, quiet at bottom) 3. Multiple fingers = multiple simultaneous voices (up to 4) 4. Lift fingers = notes release via ADSR envelope Works on iPhone/iPad (tested with safe-area insets). Mouse works on desktop. --- ## v2 Features ### XY Pad - **4 simultaneous voices** — each touch is an independent oscillator - Touch point shown as crosshair + frequency label (`A4 440Hz`) - Smooth glide when dragging (mode-dependent lag time) ### Wave Types | Button | Waveform | |--------|----------| | Sin | Pure sine — smooth, clean | | Tri | Triangle — slightly brighter | | Saw | Sawtooth — harsh, buzzy, classic synth | | Sqr | Square — hollow, reedy | ### ADSR Envelopes | Preset | Attack | Decay | Sustain | Release | Sound like | |--------|--------|-------|---------|---------|-----------| | Pluck | 5 ms | 150 ms | 30% | 200 ms | Plucked string | | Pad | 400 ms | 300 ms | 70% | 800 ms | Slow swelling chord | | Perc | 1 ms | 80 ms | 0% | 50 ms | Percussion, drums | | Organ | 10 ms | 10 ms | 100% | 10 ms | Organ, sustained | ### Effects (toggleable) | FX | Effect | |----|--------| | Delay | 330ms delay, 40% feedback | | Drive | Waveshaper soft/hard clip distortion | | Verb | Convolution reverb (2.5s impulse) | | LFO | Low-frequency oscillator vibrato (5 Hz, ±20 Hz pitch mod) | ### Play Modes | Mode | Behavior | |------|----------| | Free | Continuous pitch, any frequency | | Snap | Snaps to nearest equal-tempered note | | Penta | Snaps to pentatonic scale | | Octave | Locks to octaves of A (55/110/220/440/880/1760 Hz) | ### Visualization Modes | Mode | What it shows | |------|--------------| | Wave | Scrolling oscilloscope waveform + frequency bars at bottom | |