Triple Envelope Follower | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I show you how to use the Boundary Layer as a triple envelope follower."

Introducing Boundary Layer by Schlappi Engineering

video upload by SCHLAPPI ENGINEERING

"Boundary Layer is a triple cycling slew acting as a powerhouse of modulation, audio mayhem, and obscure modular tricks."

00:00 Intro Montage
00:26 Introduction
00:43 Control Overview
01:50 Stereo Drone Patch
04:54 Three Percussive Envelopes
07:50 Envelope, Portamento, and Modulator
10:45 Outro jams

Check with dealers on the right for availability.

8 Patches with Boundary Layer by Schlappi Engineering

video upload by Stazma

"New Schlappi Engineering module alert!!!!
Welcome the Boudary Layer, a triple cycling slew acting as a powerhouse of modulation, audio mayhem, and obscure modular tricks in the tradition of Serge DUSG, the Make Noise Maths, our own Boundary, and others while also bringing a few new things to the table.

I'll show you some of my favorite patches with it, most can apply to other similar modules so it might interesting to anyone.

Have fun!"

Schlappi Engineering BOUNDARY LAYER / triple function generator / extensive playthrough

video upload by BRiES

"BOUNDARY LAYER by ‪@SCHLAPPIENGINEERING‬ is an apex triple function generator for eurorack. It has all the tricks up its sleeves and (as usual) is just a joy to work with due to it's well thought out interface and versatile feature set.
In this video I tried getting across how damn useful function generators are, how BOUNDARY LAYER works and how much fun it is to make patches with the module.
I hope you enjoy the video."

0:00 intro
0:40 feature overview
41:22 patch examples
1:00:15 closing thoughts



Boundary Layer is a triple cycling slew acting as a powerhouse of modulation, audio
mayhem, and obscure modular tricks. Each of the channels can act individually as:
-a modulation oscillator
-voltage controlled slew (including portamento)
-AR/AD envelope (decay or release determined by choice of input).

All three channels are tied together by three global inputs, as well as three outputs which select the MAX, MID, and MIN of all three voltages. Using different combinations at audio rate allows for patch programmable stereo drone synth capabilities.

Features

3 separate channels
3 global inputs
3 combined outputs MAX/MID/MIN
Oscillates from low LFO rate (a minute?) to audio rate (>10kHz with exponential feedback)
A CV input switchable between RISE/FALL/BOTH
Bound input for simultaneous control over cycling rate and amplitude
TRIG input for AD envelopes
SLEW input for AR envelopes and portamento or filtering
EOC ouput header switchable between EOR and EOF
16 HP
Skiff friendly 32mm depth (including cable)
current draw: +12V 170mA, -12V 100mA

Check with dealers on the right for availability.

BTFLD Cv to Gates | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I show you how to use the BTFLD as a gate extractor for control voltage signals. I'll be using a stepped voltage from a Nibbler so the results are going to be on the clock, but feel free to experiment by sending cycling envelopes, LFOs, whatever you want, to get some weird wonky gates out of it."

Stereo Sine | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I show you how to make big stereo sounds using the sine and co-sine output of the Three Body, alongside some phase modulation."

Relentless Kick Drums - Schlappy Jam

video upload by SCHLAPPI ENGINEERING

"New year for Schlappy Patching! We are no going to upload half of these to Stazma's channel to see if we can get more people to see these patches, so please go over here in two weeks for the next episode: / stazma

Too many hard kicks for no reasons.

Have fun!!"

808 Kick + | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I show you how to patch a clasic 808 style kick drum and then make it weird, all within the Angle Grinder."

BTMX pattern remix - Schlappy Patching 2025 EP.7

video upload by SCHLAPPI ENGINEERING

"New year for Schlappy Patching! We are no going to upload half of these to Stazma's channel to see if we can get more people to see these patches, so please go over here in two weeks for the next episode: / stazma

In this one we are going to use the BTMX to process a fixed trigger pattern and use the OR logic to add hits to it, so you can play around creating fills by flipping the switches!

Have fun!!"

BTFLD burst generator | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I show you how to use the BTFLD as a "burst generator", in other words how to feed it signals to extract clusters of gates from them."

Trying to recreate Keith Emerson's sequencer trick of Karn Evil 9

video upload by Frap Tools

"Karn Evil 9 has one of the wildest endings in the history of music-made-with-synthesizers. Many tutorials focused on recreating the sequence note by note, trying to nail the sound, but we wanted to explore the technique to program a sequence that goes faster and faster until it stops. Thanks to the Usta sequencer, it was an easy game!

Original performance mentioned in the video: • Emerson, Lake & Palmer - Karn Evil 9 ... [below]

https://frap.tools/usta

00:00 Introduction
02:42 Programming the sequence
05:35 Making it stop by itself
10:26 Adding the explosion"

Emerson, Lake & Palmer - Karn Evil 9 (California Jam 1974)

video upload by Matt Cave

BTFLD Drum Ratchet & more 4-Bit pattern - Schlappy Patching 2025 EP.6

video upload by Stazma

"Today we will make some drum patterns using the 4-Bit modules once again but in a more predictable way, taking advantage of the reset input on the Nibblers.
We'll also have a look at a very fun way to generate "bursts" or rum rolls kind of pattern with the BTFLD being fed some slopes at it's input!

Have fun!"

BTFLD Noise Generator | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I show you how to use the BTFLD as a weird noise source."

Nibbler's Shift Register - Schlappy Patching 2025 EP.5

video upload by SCHLAPPI ENGINEERING

"In this one we are going to use the shift register part of the Nibbler (two of them actualy) to generate the base of a pattern."

Serge Filter Tour | Serge Modular | Episode 07 | Res EQ, VCF2, Siegfried, VCFS, VCFX, VCFQ

video upload by Cinematic Laboratory

"There are currently 1601 filters on ModularGrid. It may be impossible to pick the right one for your case. If we check out the modular pioneers, we'd see Moog's legendary ladder. Buchla only made a rare triple bandpass, Roland and Korg refined far eastcoast synthesis and there are a few exotics like the Wasp and the Polivoks. In this video I want to focus on the Serge filters (eurorack format) which I rediscovered last year. He has five designs with distinct differences. There's the RES EQ fixed filter bank, the VCF2 variable bandwidth with no resonance (?), the VCFS with a variable slope (?) and the highly appreciated VCFQ with variable resonance. A few weeks ago Serge released the VCFX with a 'new gate' on a single panel. It's a simple utility filter on its own, but combined with the gate we'll have a patch programmable LPG. Or a bandpass gate.

I'll be using the Schlappi THREE-BODY as a triple sawtooth voice making a chord. It's a big and nasty sound that could use a filter. It inevitably turned out to be a long video because I had the pleasure to go through five different filters. I tried to keep it fresh and entertaining. Who doesn't love playing the cut-off :)."

dream forge ... Syntakt, A4, Minifreak, Modular ... Electro, Chillstep, IDM

video upload by substan

"Recorded in one take into 1010music Bluebox.
Mixed & mastered in Ableton Live.

Drums: Syntakt, Basimilus Iteritas Alter
Bass/Kick: Neutron
FM Lead: Schlappi Engineering Three Body
Pad: Minifreak
Other tonal sounds: Analog Four MK II
Squarp Instruments Hapax - sequencing

This track is available for my patrons.
The great support from my patrons makes all of this possible ... thank you so much guys !!
/ substan "

Angle Grinder Pings | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today we make lovely percussions with the Angle Grinder!"

BLEND / PHONOGENE piano sample / NIBBLER rhythms and modulation

video upload by BRiES

"The patch is being driven by a pair of NIBBLERS, one as a shift register the other one just as a counter. They trigger drums, create modulation for the 'gene-size' on PHONOGENE, as well as creating the melody for the bassline."

Nibbler & BTFLD combo - Schlappy Patching 2025 EP.3

video upload by SCHLAPPI ENGINEERING

"In this one we are going back to use the BTFLD as a sub audio buddy to the Nibbler, to create more gates and stepped voltages out of it."

Stereo Rungler and using chaotic sounds in a track - Schlappy Patching 2025 EP.1

video upload by SCHLAPPI ENGINEERING

"In this one we are going back to first ever patch we made last year: the Rungler.
I'll expand on it a little bit, make it stereo and show you a fun way to use chaotic sound as a sound design tool in Abelton Live at the end."

BTFLD Feedback | Schlappy Patching

video upload by SCHLAPPI ENGINEERING

"Episode 22 for Schlappy Patching!

In today's episode I will show you some stuff you can do with the feedback from the BTFLD, how to control it via CV using an external VCA and even use it a control voltage source to 'disturd' your patches."

Switching Things with Muxlicer | Schlappy Patching

video upload by SCHLAPPI ENGINEERING

"For this one we have a guest of honor, the Muxlicer by Befaco!
And I'm going to show you a few fun things you can do using many outputs from the Schlappi modules into a switch for interesting and complex results."