Teenage Engineering EP-133 K.O. II Guide for Beatmakers

What is the EP-133 K.O. II and who is it for?

The EP-133 K.O. II is Teenage Engineering's compact sampler and sequencer, listed at $329 on the TE site when checked in September 2026^[1]. It records through a built-in mic or a stereo line input, sequences 12 tracks per pattern and runs on four AAA batteries or USB-C.

It suits beatmakers who want a fast sketchpad with a real sampler inside: boom bap, lo-fi, house loops and quick flips on the train. It is not a place to build a dense 30-track arrangement, and it does not try to be.

All figures come from TE's product page^[1]. It also has stereo line in and out, TRS MIDI in and out, and sync in and out (8th, 16th note or Sync24) for clocking other gear.

How does the EP-133 organize projects, groups and patterns?

Each of the 9 projects has four groups (A to D), each group holds 12 samples on the pads and up to 99 patterns, and patterns are combined into up to 99 scenes^[2]. Patterns can be 1 to 99 bars long, set per group.

• Group A Drums. The factory library keeps kicks in slots 1 to 99, snares from 100, hi-hats from 200 and percussion from 300^[3].
• Group B Your chopped sample or loop.
• Group C Bass, played chromatically in KEYS mode.
• Group D Chords, vocal chops or textures.
• Scene A snapshot of which pattern each group plays: the verse, the hook, the break.
• Song position Song mode steps through positions 1 to 99, each holding a scene.

Sounds are chosen in SOUND mode, where each pad also gets amplitude, pitch, play mode (oneshot, key or legato), trim, envelope and time-stretch settings. Those edits live in the project and do not overwrite the sample unless you crop it on purpose.

How do you sample on the EP-133?

Enter SAMPLE mode, choose a source with minus and plus, then press and hold an empty pad to record; release to stop. Sources include the mic, line in (stereo, mono, left or right), resample of the EP-133 itself, and USB audio^[4].

1. Pick the source
   In SAMPLE mode press minus or plus to switch between mic, line in, resample and USB. Use line in stereo for records and synths.
2. Set level and threshold
   Knob X sets input level and knob Y sets the threshold, so recording starts only when the sound arrives.
3. Record to a pad
   Hold a pad while the source plays. The pad stops blinking once it holds a sample; press it again to audition.
4. Go hands free when needed
   Press SHIFT and a pad to have the unit hold the pad for you, which frees both hands for a synth or turntable.
5. Resample a pattern
   Engage hands-free sampling on the resample source and press PLAY; the unit records the length of the current pattern, or a bar count you set with minus and plus.

Resampling is how you get around the voice count: bounce a busy drum pattern or a chord stack to one sample and play it from a single pad. Samples are stored automatically in the next free slot, so rename and organize them later with the EP sample tool.

How do you chop a sample on the EP-133?

Press SHIFT + SAMPLE for CHOP, then choose auto-chop by pressing a group pad, or live chop by tapping pads while the sample plays. Auto-chop has an equal-length mode for tightly timed loops and an attack mode that cuts at the loudest hits^[4].

Auto-chop resets the pad assignments of the group you pick, so chop into an empty group. After chopping, select any pad and use knob X and knob Y to fine-tune start and end points; hold SHIFT for finer steps. For the thinking behind good chop points, see how to chop samples.

Fitting loops to your tempo

The sound edit TIME page stretches a sample in BPM mode (you enter the sample's tempo) or BAR mode (it fits the sample to 1 or 2 bars at the project tempo), and it can also reverse the sample^[3]. BAR mode is the quicker option for a 1 or 2-bar loop sampled at an unknown tempo.

How do you record patterns and add swing?

Press RECORD then PLAY for a four-beat count-in and play the pads; press PLAY again to stop, or hold RECORD while the pattern runs to overdub. Patterns default to 1 bar, and RECORD plus minus or plus changes the length up to 99 bars^[5].

For step input, stop playback, move through steps with minus and plus, and hold RECORD while pressing a pad to place it on the current step. The sequencer runs at 96 ticks per quarter note, so free-time nudges are fine enough to push a snare slightly late.

The settings above come from TE's functions guide^[4]. Recording in free time and then correcting just the kick keeps the loose feel that makes boom bap drums work.

How do punch-in FX and send effects work on the EP-133?

Hold FX and the 12 pads become punch-in effects: press a pad to apply one, press harder for more, and combine several at once. They are the quickest way to perform variations over a playing loop^[6].

Separately, press FX while playing to pick one of six send effects (delay, reverb, distortion, chorus, filter or compressor) and use the fader to set how much of the current group goes to it. Holding FX and a group pad solos that group.

• Master compressor SHIFT + FX opens the output settings: knob X sets drive and knob Y sets speed. Start gentle, then push drive until the drums just start to pump.
• Sidechain Note-triggered: pick a source sound and destination groups, then set the length and shape of the duck. It can duck the bass under a kick that never even sounds.
• Live input FX In MAIN, knob Y sends the audio input through the internal effects, handy for processing a synth or phone live.

How do you build a song and back up your projects?

Use COMMIT to save the current pattern combination as a scene and start the next scene from it, then assign scenes to positions in song mode. A song position lasts as long as the longest pattern in its scene, and 99 positions allow songs up to 9,801 bars^[1].

Commit early and often. The workflow TE describes is to commit before punching in new sounds, so every good idea becomes a scene you can return to^[2].

Back up with the browser-based EP sample tool over USB-C. It moves samples to and from a computer^[4], and TE's product page lists backup and restore of individual projects^[1]. Files at a lower sample rate than the native 46,875 Hz keep their rate on transfer, so an 11.025 kHz mono sample takes a fraction of the space and sounds suitably grainy^[4].

What are the EP-133's limitations?

The main limits are memory, screen and pad count: 128 MB fills fast with stereo loops, the segment display shows numbers rather than waveforms, and 12 pads per group means a full chopped break often spans two groups. None of these stop you making beats, but they shape how you work.

• Memory Sample drums and short phrases in mono where you can, and trim before saving. Long stereo loops are the fastest way to run out.
• Editing Trimming by ear with two knobs is slower than dragging markers on a waveform. Do detailed prep in the sample tool or your DAW.
• Voices 16 mono or 12 stereo voices; resample layered parts to free them.
• Mixing One stereo output and a master compressor. Export the parts to a DAW if the beat needs a real mix.

If you want effects-first sampling with a larger screen, the SP-404MKII beginner's guide covers the closest rival. For a side-by-side of price tiers and features, see the best grooveboxes for beatmakers. And if the grainy sound is the goal, lo-fi beats from scratch shows how to lean into it.