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Quick start & export: Riff of the Day
  1. Choose today’s challenge or Practice. “Give me a start” provides an editable idea.
  2. Edit the grid, play the synthesized sketch and meet the displayed rules.
  3. Lock it in, then use MIDI on its kept card. Export JSON to back up the shelf.

Two-bar Drop D sketches, not finished guitar audio. MIDI validity does not establish target-DAW or Cinderhall import compatibility. Local storage is browser-specific; export to keep your work.

Go to kept riffs & MIDIGo to JSON export
Riff of the Day CinderhallFree tool · Road Worn series

Riff of the Day

0day streak
Practice tempo
tap once: palm-muted chug tap again: open accent third tap: clear Keys: arrows move, Space taps. The band follows your riff.

Today's rules · checked as you tap
Style points · not required, just bragging rights

Style points reward the spice on top: off-beat hits, gallops, the dark ♭2 and ♭5, mixing chugs with ringing accents, a wide pitch range, and a busy turnaround at the end.

Your riff shelf

One challenge a day. Everyone gets the same rules on the same date: a meter, a tempo and two or three constraints such as “three notes only”, “the ♭2 must appear” or “nothing on beat 1”. Constraints push you out of your habits; that's where new riffs come from.

Lock it in once every rule is met (three notes or more) to keep the riff and extend your streak. Re-locking today replaces today's riff. Practice gives extra challenges that never touch the streak. Give me a start drops in a rough riff that already meets the rules, for days you're stuck; make it yours from there.

Drop D, notes on the low strings. Kept riffs export as **MIDI** for your DAW, and the whole shelf (with your streak) exports as JSON. Everything lives in this browser on this machine: no account, no network.

Riff of the Day is a free tool from Cinderhall, the Road Worn plugin workshop. Fonts: Big Shoulders Display and Familjen Grotesk (SIL Open Font License 1.1, texts in the fonts folder). The band you hear is a synthesised sketch; your riff through your amp is the real test.