ArpSynth: Arpeggiator Synth

Hold a chord and ArpSynth plays it back as a pattern, in time, rising and falling across up to four octaves. Turn the knobs and the sound changes as it plays.

There's no setup: press a key and it's already playing. Everything sits on one screen: two oscillators, ring modulation, FM, overdrive, fuzz, reverb and a full arpeggiator. No menus to dig through, no account to create.

THE ARPEGGIATOR
• Hold one key or a whole chord and it plays in time
• Six patterns spanning one to four octaves
• Tempo from 40 to 200 BPM, plus a Divisor knob for faster or slower steps
• Turn Octaves to zero to switch the arpeggiator off and play the synth directly, up to four notes at once

THE SOUND
• Oscillator 1: sine, saw, square or noise, with octave and level
• Oscillator 2: sine, saw or square, with octave and detune for thick, beating tones
• Ring modulation and FM for metallic, bell-like and aggressive sounds
• Decay, from short plucks to longer notes
• Overdrive and fuzz for grit, reverb for space

THE KEYBOARD
• Sized for your screen: ArpSynth picks how many keys fit comfortably, from 13 to 37
• Show more or fewer keys with + and -, and move between octaves with < and >
• Multitouch, with octave numbers on every C
• Your touch shapes the tone: play toward the top of a key for a brighter note
• Slide your fingers along the keys to change notes without lifting
• Plays in portrait or landscape

PRESETS
• Save any sound under a name and bring it back with one tap
• ArpSynth remembers where you left off, so your last sound is waiting when you return

UNDER THE HOOD
• Every note is synthesized live by ArpSynth's own sound engine: no samples, no loops
• 48 kHz, 32-bit floating-point stereo output
• No ads, no account and no internet permission. It works completely offline.

Put on headphones, hold down a chord and start turning knobs.