SKR4CH: Free Browser Waveform Designer for Single-Cycle, Wavetable, and Sustained Samples

# What SKR4CH does SKR4CH is a free, browser-based waveform designer for synths and samplers. It creates three types of files you can use as oscillator sources: single-cycle waves, wavetable frame sets, and sustained samples. The app runs in the browser, generates audio locally, and exports standard WAV files for use in compatible instruments.

# How the editor works

# Wavetable and morphing SKR4CH converts static designs into wavetables by defining Start and End states and adding intermediate stops. You can morph nodes, curves, harmonic-partial settings, and the Mix balance across frames. Morphing applies to the drawn waveform and the harmonics, producing numbered frames that represent the progression.

# Realtime auditioning and performance You can audition edits in realtime by selecting a note and holding the spacebar. The visible notes are playable polyphonically using the computer keyboard, which helps you judge a waveform as an instrument rather than only as a graph.

# Export options and settings

# Project saving, privacy, and runtime You can save projects as a text file or copy a shareable link. The app generates sound locally using the Web Audio API and AudioWorklets. There is no account, subscription, or download required, and waveform data is not uploaded during normal use.

# Known limitations to plan for SKR4CH has no undo, redo, or autosave, so save before making destructive changes. Those are the notable workflow caveats called out in the source.

# Practical uses and workflow tips

• Use the drawable canvas for quick timbral sketches and the harmonic partials to add controlled overtone content.

• Use computer-keyboard polyphony and spacebar preview to evaluate how a waveform will behave musically before export.
• Save project text files frequently to avoid losing manual edits since there is no undo or autosave.

# Where it fits SKR4CH is useful when you want immediate, visual waveform design without installing software. It's suited to sound designers who need single-cycle waves, wavetable frames, or short sustained samples for use in samplers and wavetable synths.