Northline
Play a polyphonic synth from your keyboard
About the app
Polyphonic desk synthesizer for the browser, played from on-screen keys or the computer keyboard with a live oscilloscope and level meter. Players choose sine, triangle, saw or square waves and shape the sound with filter cutoff and resonance plus attack, decay, sustain and release controls. Z, X and the arrow keys shift the octave, and audio stays off until it is started. Built with Grok.
- Maker
- @Kli
- Built with
- Grok
- Posted
- Source
- Original post on X
Added . Is this yours or is something wrong? Report an issue or get it featured.
The prompt
How was it built?
Ask for the prompt.
Not shared yet
@Kli hasn't shared the prompt behind Northline. If it gets added, it shows up here with a copy button.
More like this
More built with Grok, 21 creative and music apps.
- Visit
Play a subtractive synth in the browser
coral-sail-zephyr-cedar.grok.meBrowser subtractive synthesizer played from on-screen keys or the computer keyboard, with an oscilloscope and level meter that react to each note. Players pick sine, triangle, saw or square waves and lead, pad, bass or bell presets, then shape the tone with cutoff, resonance, attack, decay, sustain and release knobs. Z and X shift the octave, and the interface is in Japanese. Built with Grok.
Grok@kosuke_n24, - Visit
Keep lyrics and Suno prompts together
alaskan-dust-studio.grok.meSongwriting notebook in the browser that keeps raw ideas, lyrics, Suno prompts and video shot lists for each song together in one place. A New Idea button takes typed or spoken thoughts, a Suno Prompt card collects style, vocal and tags for one-click copying, and a Storyboard holds shots and video prompts. Saved songs sit in a Library where they can be duplicated, exported or deleted. Built with Grok.
Grok@AkDravenwolf, - Visit
Turn a paragraph of prose into a melody
cadence2.grok.meBrowser tool that turns pasted prose into a melody: each word keeps its own note, syllables set the rhythm and a full stop lets the phrase land. Users can set tempo, volume, key, scale (pentatonic, major, minor or Dorian) and voice (bell, piano, flute or reed), follow the notes on a score and export the result as a MIDI file. Built with Grok and shared on grok.me.
Grok@Conchvegas1,
For makers
Ship it once.
Let people find it.
Listing is free. Send the link and your X handle, and we email you when it's live.
Submit your app, freeShow the prompt.
Add the prompt you used; it shows on your card and app page with a copy button.
The prompt
