Chapter 9
Sampling & chopping
Record from the mic, line in, USB or yourself — then chop it up.
Sampling basics
Sampling on the K.O. II takes one key and one pad. In SAMPLE mode every pad of the current group blinks, ready to record: hold one down to record into it, and let go to stop. The new sample is stored in the library straight away.
- Press the group key you want to sample into, A–D.
- Press SAMPLE. The pads blink.
- Hold a pad and make the sound. Recording stops when you let go.
- The pad stops blinking and stays lit. Press it to hear the sample.
- Record into more pads the same way, then press MAIN to leave.
Key combinations
- SAMPLE
- Enters SAMPLE mode; the pads blink to show they can record.
- Hold PAD
- Records into that pad for as long as it is held.SAMPLE mode
- SAMPLE
- Lets you retake the sample if it didn’t come out right.After recording
- MAIN
- Leaves SAMPLE mode.SAMPLE mode
From the community
4. SAMPLING & CHOPPING // KO II teenage engineering // beginner tutorial
SON WU
Part 4: recording samples and chopping them across pads.
Why the EP-133 is Special!
Ricky Tinez
Shows a full sample-everything workflow, from piano chords to synth bass and vocals, with honest gotchas.
Choosing an input, level and threshold
In SAMPLE mode, − and + choose where the sound comes from, X sets the input level and Y sets a threshold so recording waits until the sound gets loud enough — no more trimming silence off the start.
Sources
| Source | Display | Notes |
|---|---|---|
| Built-in mic | — | In the speaker grille. |
| Line in, mono | in | Both input channels summed to mono. |
| Line in, stereo | in | The full stereo input. |
| Resample, mono | rsp | The K.O. II’s own output — Resampling. |
| Resample, stereo | rsp | As above, in stereo. |
| Line in left | L.IN | Left channel only, as mono. |
| Line in right | R.IN | Right channel only, as mono. |
| USB, mono | usb | Audio from a computer or phone — USB audio. |
| USB, stereo | usb | As above, in stereo. |
LEVELInput level
How loud the incoming sound is recorded.
Knob X
Hands-free sampling
Holding a pad is awkward when you need both hands for a guitar or a keyboard. Hands-free sampling holds the pad for you: start it with SHIFT and a pad, play, then stop it with SAMPLE.
Key combinations
- SHIFT + PAD
- Starts hands-free recording into that pad.SAMPLE mode
- SAMPLE
- Stops hands-free recording.While recording
- Hold FX
- Lets you tweak the effect’s X and Y while recording (OS 2.5).Hands-free resampling
- Set the threshold first (Choosing an input, level and threshold) so recording starts when you do, not when you press the keys.
- Recording stops by itself at the maximum sample length.
- Choose an empty pad: since OS 2.0.1 hands-free sampling isn’t allowed on a pad that already has a recording.
- After starting, you can switch to another group to play its sounds into the recording.
From the community
K.O. II champions update OS 2.0
teenage engineering
TE’s own four-minute tour of OS 2.0: resampling a chord, hands-free sampling, song mode and sidechain, each shown on the device.
Resampling
Resampling records what the K.O. II is playing back into a new sample. Bounce a finished beat to one pad, print effects and punch-in FX, combine several samples into one, or stretch a whole section — and free up voices and groups as you go.
Resample a pattern
- Press SAMPLE, then + until the display shows
rsp. - Hold SHIFT and press an empty pad to arm hands-free sampling.
- Optionally press − or + to choose how many bars to record.
- Press PLAY. The K.O. II records the current pattern (or the chosen number of bars) and stops by itself.
Key combinations
- SHIFT + PAD, then PLAY
- Records the length of the current pattern into that pad.SAMPLE mode, resample source
- − / +
- Sets how many bars to record once PLAY is pressed.Hands-free sampling armed
From the community
- Check the source before resampling: if it is still on the mic, you record the speaker instead of the internal mix (sometimes a nice lo-fi accident). via Elektronauts: EP-133 Tips and Tricks
K.O. II champions update OS 2.0
teenage engineering
TE’s own four-minute tour of OS 2.0: resampling a chord, hands-free sampling, song mode and sidechain, each shown on the device.
KO II Resampling Tactics
Jay Maculate
Practical resampling: baking filters, send FX and punch-ins into kicks, snares and bass to save effect slots.
Baking in PUNCH-IN FX using resampling on KO2
ManCalledMif
Short demo of printing punch-in FX into a new sample via OS 2.0 resampling, with notes on the time limit.
How to make better beats on the EP Series
Noisegate
Ten workflow tips for the EP series, such as quick FX switching, scene-building and using resampling to beat voice stealing.
Resampling a chord
One pad, one chord: resample a chord from KEYS mode and you can trigger the whole thing from a single pad, chop it, or play it chromatically.
- Press SOUND, press a pad and choose a sound from the library.
- Press MAIN, press the pad, then KEYS.
- Press SAMPLE, then + to choose resampling.
- Press the group key of the group you want the new sample in.
- Press SHIFT + an empty pad to start hands-free sampling.
- Go back to the group with your sound and play the chord on the pads.
- Press SAMPLE to stop. The chord is now a sample on the other group’s pad.
Choosing where a sample is stored
New samples go into the next free slot. If you keep a tidy library — say, your own acid lines in the 300s — you can choose the slot before you record.
- Hold SOUND and type the slot number on the pads (for example 3, 0, 3).
- Press ENTER.
- Press SAMPLE and record as usual. The sample lands in that slot.
Sample rate and length
Lower recording rates use less memory and add character — the lowest is properly crunchy. The setting lives in the system settings and applies to new recordings.
- Press SHIFT + ERASE to open the system settings.
- Press + until you reach
smp, then ENTER. - The display shows
rec. Press ENTER again. - Use − and + to choose
lo,midorhi, then press ENTER. Or type the code directly.
| Code | Setting | Rate |
|---|---|---|
| 500 | lo | 26.25 kHz — very lo-fi |
| 501 | mid | 32 kHz — some character |
| 502 | hi (default) | 46.875 kHz — the K.O. II’s standard quality |
From the community
The EP-133 KO II 2.5 UPDATE Made It 100% COMPLETE
Bass Robotics™
Another OS 2.5 walkthrough, with a sample-rate listening test and a look at the arpeggiator.
Chopping samples
Chopping cuts a sample — a drum break, a chord progression, a vocal — into slices spread across the pads, so you can replay them in a new order. Auto-chop finds the slices for you; live chop lets you tap them in by ear.
Auto-chop
- Press the pad with the sample you want to chop.
- Press SHIFT + SAMPLE to enter CHOP.
- Press the group key the slices should go to. That group’s pad assignments are replaced.
- Use − and + to choose the number of slices. They fill the pads from bottom left to top right.
- To change the method, hold the same group key and use − and + to pick equal length (
EQU) or attack mode, then let go and set the slice count. - Press MAIN when you are done.
Auto-chop methods
- Beat tracking
- The K.O. II detects the slice points from the beats in the sample.
- Equal length (
EQU) - Perfectly even slices — best for loops with exact timing (OS 2.5).
- Attack
- Slices at the loudest hits — best for percussive material.
Live chop
- In CHOP, start the sample playing.
- Press pads as it plays — each press marks a slice, and the gap until the next press sets its length.
- To fine-tune a slice, select its pad and turn X for the start and Y for the end. Hold SHIFT for finer steps.
INSlice start
Where the selected slice starts. Hold SHIFT for finer steps.
Knob X
Key combinations
- SHIFT + SAMPLE
- Enters CHOP for the selected pad’s sample.
- A–D
- Chooses the group the slices go to and auto-chops into it.CHOP
- Hold A–D + − / +
- Switches between the auto-chop methods.CHOP
- − / +
- Sets the number of slices.CHOP
From the community
- Chopped slices are put in a mute group so they cut each other off. To play slices together or as chords, take the pads out of the mute group in sound edit. via OP Forums: Long or chopped sample chord polyphony?
KOII just got ANOTHER UPDATE!
SON WU
Concise chaptered tour of OS 2.5: USB audio, sample rates, crop, equal chop, reverse, nudge, pad copy and scale mode.
4. SAMPLING & CHOPPING // KO II teenage engineering // beginner tutorial
SON WU
Part 4: recording samples and chopping them across pads.
EP-133 K.O. II hip hop Sampling Master Class
Ave Mcree
Hip-hop sampling masterclass: manual and auto chop, beat-matching a break and time-stretching.
USB audio
One USB-C cable now carries stereo audio both ways. Play audio from a computer or phone into the K.O. II to sample it or run it through the effects, and record the K.O. II’s output straight into a DAW — no headphone jack needed.
Sample from a computer
- Connect the K.O. II to a class-compliant USB audio host (a computer or phone) with a USB-C cable.
- On the computer, choose the K.O. II as the audio output device.
- Press SAMPLE, then + until the source is
usb. - Hold a pad to sample what the computer is playing.
To record the K.O. II, select it as the input device in your DAW or recording app.
USB input mode (system settings)
| Code | Mode |
|---|---|
| 510 (default) | USB audio goes to the sampler only. |
| 511 | Sampler plus live monitoring — you hear the USB audio through the K.O. II. |
From the community
- To hear audio arriving over USB, set
smp>usbtomon(code 511), then raise the input level with X in MAIN. via OP Forums: USB in and out on the EP
mr. update brings new updates for K.O. II, riddim & medieval!
teenage engineering
TE’s short announcement of OS 2.5 for K.O. II: USB audio, reverse playback, sample-rate choice, equal-length chop and new scales.
midnight operations, ep 23 - EP updates with johan + guests
teenage engineering
TE livestream where developer Johan talks through the 2.5 update; also showcases the community EP-PatchStudio tool.
Teenage Engineering OS 2.5: USB Audio Changes Everything!
Backpack Jam
Explains what OS 2.5’s USB audio means in practice for recording, streaming and sampling from a phone or computer.
- EP–133 guide: how toteenage engineering — Short recipes from TE: velocity sensitivity, scale changes, syncing with POs and drum machines, resampling a chord, sampling over USB audio.
- USB in and out on the EP 2026 2.5 and 1.5 updatesOP Forums — Explains the system setting needed to monitor USB audio input after OS 2.5.
