Press a s d — kick, snare, hihat — or tap the pads. Then grab sliders while you play: the block above the scope shapes the tone (pitch, FM character, the pitch sweep), the block below shapes the body (how long it rings, how much noise snap, how bright that noise is). The scope draws every hit you fire.

The highlighted row — Rand — is the soul of the machine. Turn it up and every hit comes out slightly different: the soft band on each slider shows how far a hit may wander, and the white ticks flash where it actually landed — left and right channel each roll their own dice, which is also where the stereo width comes from. Machines repeat; drummers don’t.

Below the voices sits the master chain, in signal order — reverb, drive, bitcrush, compressor, volume — applied to all three voices together. This is where polite drums go to get ruined, in a good way.

Found a sound you love? Hold a PRESET slot for a moment to keep it, tap it (or press 1–8) to bring it back. Presets stay in this browser.

A MIDI controller makes it a real instrument: any note with a C, D or E pitch class plays kick, snare or hihat, velocity and all. To put a slider on a physical knob, click learn, click the slider, turn the knob — done, and remembered. And if you install zygfred as an app (the install icon in Chrome’s address bar), it opens ready to play — MIDI makes sound without a single click.