Kastle 2 Alchemist

Compact Patchable Hybrid-Synthesis Instrument with MIDI

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Kastle 2 Alchemist is a patchable hybrid-synthesis based instrument that empowers you in discovering melodies and even harmonies despite being monophonic. Patch programmable sequencing via the control signals into the two PITCH MOD inputs opens up a world of melodic inspiration beyond classic arpeggios while staying in your preferred SCALE.

5 synthesis modes

The Alchemist has a carefully tuned wide timbral range spanning across 5 synthesis modes (FILTER, FM, HYPERSINE, SUPERSAW and GLITCHNOISE) accessed by main TIMBRE sweep that is refined by the RATIO control.

The ENV macro knob affects different parts of the synth and sequencing engine to maximize musicality and it even lets you continually morph between the synthesis modes and access truly unique sounds.
The timbral palette is further extended by the dual FX section which offers either a wide delay that will smear the arpeggios into echoed harmonies or a chorus-flanger-distortion-combfilter macro custom tuned for each synth mode.
You can also access gliding rubber textures with the PITCH SLIDE macro that applies pitch envelope and portamento.
You can customize its rhythms and scales with the web-based app.

A Fit for your pocket

The Kastle 2 Alchemist is a compact, portable instrument that runs on 3‌‌‌‌‌‌‌ AA batteries or USB-C, so it can inspire you anywhere, anytime. It loves to jam with your other portable gear—sync it with the sync in/out ports, and use the audio input to mix external signals with the Alchemist’s output or run them through its built-in effects.

Modulate anything

All main parameters can be modulated and tightly sequenced by the surprisingly powerful CV and GATE pattern generator alongside with syncable LFO that can be modulated as well.

MIDI In & Out!

The Alchemist is a semi-autonomous companion that keeps surprising you with fresh ideas. Kastle 2 is not just a sound box—it’s a powerful MIDI controller and sequencer. Send finely curated USB MIDI data to your DAW or USB MIDI instrument, and discover new ways of playing and interacting through a modular interface. The Alchemist both sends and receives USB MIDI, making studio integration a breeze!

Make it fun

Do not write melodies! Let them emerge from the behavior you set-up by the patch interaction of various modulation sources.

Features

5 synth modes
— FILTER
— FM
— SUPERSAW
— HYPERSINE
— GLITCHNOISE
Hybrid synthesis
— 4 oscillators
— FM with feedback
— Raw Waveform mixing
— Ring mod
— Track and hold
— Stereo noise with track and hold
— Stereo Filter
— Transient shaper
Dual FX section
— Delay to the left
— Chorus/Flanger/Distortion to the right
stereo audio processing at 44kHz/16-bits
PITCH knob with range of ± 2 octaves (4 octaves total)
PITCH MOD attenuverter knob for modulating pitch
— NOTE input: quantized pitch with selectable scales (updates on trigger)
— ►PLAY input: 3rd, 5th and octave above NOTE - triggers envelope on change, time quantized to PLAY GRID - great for arpeggios!
— user-defined scales via web-app
— BANK+PITCH MOD to change quantizer scale
— BANK+TIMBRE MOD for root note adjustment
— BANK+LFO MOD for fine tuning
— BANK+PITCH to change and preview octave
TIMBRE knob for main timbral sweep
— refine TIMBRE sweep with RATIO (oscillator detune ratios and wave mixing ratios)
— hit the SHIFT button to trigger the sound
— TRIGGER input to trigger sound
— TIMBRE MOD input with attenuversion
MODE input with attenuation to change synth MODE with CV
ENV knob
— turn right to set decay and focuses TIMBRE on transients
— turn left to reverse add attack and decay and focuses TIMBRE on BODY
— fully left and right enters DRONE mode
— slows down arpeggio at long envelopes
— MODE MORPHING to the left
— ENV MOD input with attenuverter
— ENV MOD updates only at trigger
— patchable ENV output of the envelope
LFO with triangle and pulse output, reset input, attenuverting modulation, synced or free
Tempo generator with tap tempo, divider, and external clock input
Pattern generator (tempo synced) with GATE and CV output, patch-programmable
GATE generator contains user-programmable RHYTHM patterns via web-app
stereo input with input gain (up to +12db), accepts up to 6 Vpp signal
input can be mixed at the output or run thru the built-in effects
stereo output capable of driving headphones up to 250 Ohm
analog sync input
analog sync output
modular I/O connections via right channel of the sync jacks
USB MIDI Input (clock, notes, CCs, pitch bend)
USB MIDI Output to use as a MIDI controller/sequencer (clock, notes, CCs)

What's in the box

Kastle 2 Alchemist unit
quickstart guide
10 patch cables
sticker
for environmental reasons, we are excluding the batteries from the package

Technical Details

USB-C (firmware updates, USB MIDI, editor features)
3x AA battery power (both rechargeable and non)
power consumption approx. 100-150 mA, should last up to 15-18 hours on 3x AA batteries.