Frequency

Offline beatmaking app for Android — no samples, pure synthesis.

Two-deck DJ interface with procedural audio generation. Everything runs locally in a WebView — zero network, zero external files, zero ads.

• 5 synth patterns: Kick, Hi-Hats, Snare, Bass, Pad — generated in real-time with Web Audio API
• 2 independent decks with play/stop/cue, pitch ±8%, 3-band EQ
• Crossfader with equal-power curve
• FX chain: Filter (lowpass), Delay, Reverb — all with adjustable parameters
• Sync B→A by BPM
• 20 KB APK — everything is code, no assets

All audio is synthesized procedurally in JavaScript using oscillators, noise functions, envelopes, and filters. The WebView loads a single HTML file from the APK's assets — no HTTP server, no internet permission needed.

./build.sh                    # uses /tmp/debug.keystore
./build.sh path/to/release.jks myalias

Requires:

• Android SDK (build-tools + platform)
• Java 8+

adb install -r frequency.apk

Two-deck view with pattern selector, pitch, EQ, crossfader, and FX panel. Tap the screen to start audio (required by browser autoplay policy).

MIT