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2 items	K&M 18993 Sturdy Double Brace X-Frame Current	K&M 18997 Lightweight Double Brace X-Frame Current
General
Manufacturer	K&M	K&M
Status	Current	Current
Price	£66	£85
Design
Stand type	X-frame	X-frame
Bracing	Double	Double
Tiers	1	1
Height adjustment	Locking lever	Stepped (5°) with scale
Size & capacity
Max load	50 kg	50 kg
Min height	594 mm	594 mm
Max height	946 mm	946 mm
Support width (mm)	327–789	327–789
Support depth	250 mm	350 mm
Build
Folds for transport	Yes	Yes
Material	Steel	Aluminium
Features	Adjustable end cap	Movable rear end caps
Size & weight
Colours	Black	Black
Weight	5.4 kg	2.45 kg

Glossary

48 terms

Hover a highlighted word on the page to jump to it here.

Basics

MIDI: Musical Instrument Digital Interface – the 1983 standard for sending notes, knob movements and timing between instruments and computers. A MIDI controller makes no sound of its own; it sends MIDI to software or hardware that does.
MIDI 2.0: The 2020 update to MIDI: two-way communication, far higher resolution for velocity and controllers, and Property Exchange so a controller can ask a synth or DAW what its parameters are and label its knobs automatically.
DAW: Digital Audio Workstation – recording and production software such as Ableton Live, Logic Pro, FL Studio or Cubase. Most controllers ship with scripts that map their controls to popular DAWs.
DAW transport: Dedicated play, stop, record and loop buttons that drive your DAW, so you can punch in without reaching for the mouse.
HUI: Human User Interface – an old Mackie control-surface protocol that almost every DAW still understands. Controllers fall back to it for DAWs they have no custom script for.
list price: The manufacturer's published recommended price (RRP in the UK, MSRP in the US). Shops usually sell for less, and it excludes any tax or shipping differences between regions.

Keys

keybed: The mechanical keyboard assembly itself – the keys, their pivots and the sensors under them. Two controllers with the same key count can feel completely different because of the keybed.
synth-action: Light, springy keys with no added weight – fast for synth lines and drums, less piano-like. The most common action on controllers under 61 keys.
semi-weighted: Synth-style keys with extra weighting or damping so they feel a little more substantial than plain synth-action, without the full mechanics of a piano action.
hammer-action: A piano-style mechanism with small hammers that give the keys real inertia. "Graded" means heavier in the bass and lighter in the treble, like an acoustic piano.
full-size keys: Keys the same width as a piano's (about 23.5 mm per white key). Most 49-key-and-up controllers use them.
mini keys: Narrower keys (roughly 80% of piano width) that let a 25- or 37-key controller fit in a laptop bag. Fine for melodies and bass; awkward for two-handed piano playing.
slim keys: In-between keys – full length but slightly narrower than piano keys – used on some compact synths and controllers.
velocity: How hard you hit a key or pad, measured by how fast it travels. Nearly every controller sends velocity; the quality of the curve is what varies.
aftertouch: Pressure applied to a key after it's already down, sent as a continuous control. Great for adding vibrato or swelling a filter while holding a note.
channel aftertouch: The common kind of aftertouch: one pressure value for the whole keyboard, so pressing harder on any key affects every note that's sounding.
polyphonic aftertouch: Aftertouch measured separately for each key (or pad), so you can lean into one note of a chord without affecting the others. Still rare on keyboards, common on pad grids.
MPE: MIDI Polyphonic Expression – a way of using MIDI so each note gets its own pitch bend, pressure and slide. It's what lets the ROLI Seaboard bend individual notes. Needs an MPE-aware synth.
octave buttons: Shift the whole keyboard up or down in octaves so a small controller can still reach the full note range.
zones / splits: Dividing the keyboard so different ranges (splits) or the same range (layers) play different sounds or MIDI channels – bass in the left hand, piano in the right.

Controls

pads: Rubber squares for finger drumming or launching clips, usually velocity-sensitive and often pressure-sensitive with RGB backlighting. 8 or 16 pads on keyboards; 64 on grid controllers.
clip launching: Triggering loops and scenes from a grid, Ableton Live Session View style. Grid controllers like the Launchpad and APC exist mainly for this.
faders: Sliders, typically nine (eight tracks plus a master) mapped to mixer levels or drawbars. 60 mm is the usual travel on controllers.
knobs: Rotary controls with a fixed start and end (about 270° of travel). Cheap and direct, but the position may not match the software value when you switch presets.
encoders: Knobs that turn forever. Because they send relative "up a bit / down a bit" messages, they never jump the software value – ideal for DAW and plug-in control.
pitch bend: A spring-loaded wheel (or strip, joystick or lever) that bends the pitch of held notes up or down. Usually paired with a modulation wheel.
mod wheel: A free-moving wheel that sends a continuous control – conventionally vibrato depth, but assignable to anything.
touch strips: Flat capacitive ribbons standing in for pitch and mod wheels on slim controllers. Lighter and cheaper, with less tactile feedback.
joystick: A single stick doing pitch bend on one axis and modulation on the other. Saves space on mini controllers.
arpeggiator: Holds a chord and plays its notes one at a time in a pattern, synced to tempo. Handy for instant rhythmic parts.
sequencer: Records and plays back a pattern of notes from the controller itself – useful for driving hardware synths without a computer.
scale mode: Restricts the keys or pads to a chosen scale so every note you hit is "in key". A safety net, or a way to play melodically on a pad grid.
chord mode: Plays a full chord from a single key or pad – either a fixed voicing you set, or chords chosen to fit the selected scale.
note repeat: Holding a pad retriggers it in time with the tempo (8ths, 16ths, triplets…) – the MPC trick for hi-hat rolls and trap hats.
display: Screen for parameter names and values. OLED is the small monochrome panel on most mid-range controllers; a colour LCD shows more but costs more.

Connectivity

USB: The cable to your computer, carrying MIDI and usually power. USB-C is current; USB-B (the square printer plug) and Micro-USB are older but work identically with the right cable.
bus powered: Runs entirely from the USB cable, no power supply needed. Big 88-key boards or anything with a bright screen may need a wall adapter.
DIN MIDI: The classic round 5-pin MIDI socket. Lets a controller talk to hardware synths directly, with no computer in the chain.
TRS MIDI: MIDI over a 3.5 mm headphone-style jack, used where a 5-pin socket won't fit. Needs a TRS-to-DIN adapter (Type A is the standard) to reach older gear.
CV / Gate: Analogue control voltages for modular and vintage synths: CV sets pitch, Gate says when a note is on. A controller with CV/Gate outs can play a Eurorack system directly.
Bluetooth MIDI: Wireless MIDI to an iPad, Mac or PC. Latency is a few milliseconds higher than USB – fine for most playing, and it frees you from the cable.
sustain pedal: A ¼" jack for a piano-style on/off foot pedal that holds notes after you release the keys.
expression pedal: A ¼" jack for a continuous (rocking) foot pedal – volume swells, wah, or any parameter you assign.
footswitch: A generic on/off pedal input, assignable to things like start/stop or patch change rather than sustain.
audio interface: Audio in/out built into the controller, so it can also be your soundcard – record a mic or synth and monitor through it.
standalone mode: The controller does something useful with no computer attached – sequencing hardware, or in Push 3 Standalone's case running Ableton Live itself.
NKS: Native Kontrol Standard – Native Instruments' format that lets a controller browse plug-in presets and pre-map their knobs. Supported by most major plug-in makers.
Light Guide: The strip of LEDs above the keys on NI Kontrol keyboards showing scales, drum-kit zones and key splits in colour.