This tiny instrument is called Macchiato Mini Synth. It sports a built-in 13-note touch keyboard, on-board speaker and 8 knobs for sound shaping. The device offers Mozzi Sound Synthesis Library for Arduino. It’s also an open source platform so it can modify the source code transfering it to the synth brain which helps to create complex algorithmic sounds.

There are 2 Macchiato versions: the cheapest one will cost you $39 and a day to assemble it. You can have a ready-made device as well for $96. Both of them are available for order at the official Zeppelin Design Labs shop.

Specs:

• 13-note capacitive touch keyboard, paraphony
• MIDI IN to control Macchiato from any MIDI device
• sine, triangle, saw, square waveform selection
• 4-octave shift (C2-C3 through C5-C6)
• adjustable attack and release
• sine, saw, ramp, square LFO waveform selection
• LFO rate, depth and cutoff frequency control
• volume control
• LED power indicator
• On-board speaker
• audio out (3.5mm (1/8”) TRS  or TRRS)
• ISP header for PC connection

Have a look at what Macchiato offers below: