KORG microKORG S (MK-1S) - 37-Key Analog Modeling Synthesizer with Built-in Speakers and Vocoder

KORG microKORG S (MK-1S) - 37-Key Analog Modeling Synthesizer with Built-in Speakers and Vocoder

The microKORG S (MK-1S) updates the classic microKORG with a built-in 2.1 speaker system and new stage-ready presets , while retaining the analog modeling engine that made it the standard. It offers 4 voices of polyphony , 2 timbres (Split/Dual) , and a flexible architecture with 2 oscillators + noise generator , multi-mode filter (LPF −24 dB/oct; LPF/BPF/HPF −12 dB/oct), 2 envelopes , 2 LFOs , and 4 Virtual Patch paths . It features an 8-band vocoder with built-in condenser microphone , a 6-type arpeggiator with step function, multi-effects (modulations, delays , and EQ), and audio inputs for processing external sources. Its 37-key mini keyboard with velocity , 5 real-time panel controls , and Favorites (up to 8 programs) facilitate an instant workflow in the studio or on stage. The compact chassis runs on either a 9V adapter or 6 AA batteries , offering true portability without the need for external monitors.

Main features

• Synthesis engine : analog modeling with 2 oscillators + noise, multimode filter, 2 EG, 2 LFO and Virtual Patch ×4 .
• Polyphony and multitimbricity : 4 voices, 2 timbres (Dual/Split) for layers or divisions.
• Programs : 256 programs (192 factory + 64 user) and 8 assignable Favorites .
• Integrated Vocoder : 8 bands with per-band level/pan editing and Formant Shift ; gooseneck condenser microphone included .
• Arpeggiator : 6 types (UP, DOWN, ALT1/2, Random, Trigger) with Step Arpeggiator .
• Effects : modulation (flanger/chorus, phaser, ensemble), delay (stereo, cross, L/R) and 2-band EQ .
• Built-in 2.1 speakers : 1 × 4 cm ( 3 W ) + 2 × 3.5 cm ( 0.5 W each) for playing without additional equipment.
• Keyboard : 37 velocity-sensitive mini keys; 5 control knobs and arpeggiator ON/OFF button.
• Connectivity : L/MONO and R outputs (1/4”), headphones (1/4”), Audio In 1 (mini jack for condenser microphone +5 V / jack 1/4” for dynamic, both with MIC/LINE selector) and Audio In 2 (line 1/4”); MIDI IN/OUT/THRU .
• Power and portability : DC 9V adapter or 6 × AA (approx. 4 h with alkaline); weight 2.5 kg ; dimensions 524 × 232 × 70 mm .

Product benefits

• Mix-ready sound : Muscified filters, drives and classic modulations with the character of the microKORG.
• Creative Voice : 8-band vocoder with included microphone for robotic leads, harmonies, and vocal textures.
• Agile Flow : 5 dedicated controls, step arpeggiator and Favorites for instant live access.
• No external speakers : built-in 2.1 system sufficient for practicing, rehearsing or improvising in small spaces.
• Full integration : send/receive MIDI via DIN, process external instruments via Audio In , and save up to 256 programs.

Use cases

• Production and live : basses, leads and pads with layers/partitions, rhythmic arpeggiator and vocoder for vocal arrangements.
• Mobile setups : Battery-powered, with built-in speakers and a compact size for composing anywhere.
• External Processing : Use the microKORG S's filter/FX with drum machines, samplers, or microphones via Audio In .

Frequently Asked Questions

• How many programs does it have? 256 in total (192 factory presets and 64 user presets), with 8 shortcuts to Favorites .
• What's included for the vocoder? A gooseneck condenser microphone and dedicated inputs for a condenser (+5 V) or dynamic microphone.
• Can I use it without a plug? Yes, with 6 AA batteries (approx. 4 hours with alkaline batteries) or with a 9V DC adapter.
• What size is the keyboard? 37-key velocity-sensitive mini keyboard.

Description for projects

KORG microKORG S (MK-1S) Synthesizer/Vocoder: analog modeling engine; 4-voice polyphony; 2 timbres (Split/Dual); 2 oscillator + noise structure, multi-mode filter (LPF −24 dB/oct; LPF/BPF/HPF −12 dB/oct), 2 EGs, 2 LFOs, Virtual Patch ×4; 256 programs (192 preset/64 user) with 8 favorites; 8-band vocoder with Formant Shift and Band Edit; effects: modulation (flanger/chorus, phaser, ensemble), delay (stereo/cross/LR), 2-band EQ; 6-type arpeggiator with Step Arpeggiator; 37 mini-key keyboard with velocity; Connectivity: L/MONO and R 1/4” outputs, 1/4” headphones, Audio In 1 (condenser +5 V mini jack / dynamic 1/4” with MIC/LINE selector), Audio In 2 (1/4” line), MIDI IN/OUT/THRU; built-in 2.1 speakers (1 × 4 cm 3 W + 2 × 3.5 cm 0.5 W); power supply DC 9 V or 6×AA (≈4 h); dimensions 524 × 232 × 70 mm; weight 2.5 kg; includes 9 V adapter and condenser microphone.