BTFLD ... IN STEREO

video upload by SCHLAPPI ENGINEERING and Stazma

"Schlappy Patching 2026 EP.1

Hey there!
Today I'll have a go at using two BTFLD for stereo sound processing and show some modulation strategy to make it sound even MORE stereo. It's quite crazy all the weird and harsh tones you can get out of it feeding just a simple triangle wave to it.

Have fun!!"

Festival of Modular 2026 Tokyo Official Digest Video

video upload by Tokyo Festival of Modular

Festival of Modular 2025 Tokyo

NOVEMBER 23 (Sun) & 24 (Mon)
AT ORD. ＆ ZAspace, Daikanyama

Live Acts from China:
tamiX / THESSIAN (Modular Commune)

Live Acts from South Korea:
OYKNI / Lim Yong JU / Noddy Woo

Live Acts from Taiwan:
MADZINE / weiii

Live Acts from Spain:
espinoza / Alpha Decay

Live Acts from Czech Republic:
Václav from BASTL INSTRUMENTS

CLICK FOR MORE »

Beyond the Noise: Synth and Eurorack Performance

video upload by MKustomAudio

"The initial idea of this track started with just ambient noise created by running the Mutable Instruments 'Plaits' through the Schlappi Engineering 'Interstellar Radio'. This noise was further processed and randomized by running the signal through various filters and effects.

After deciding to add in melodic and percussive content, the Moog 'Mother 32' and Novation 'Bass Station II' (AFX overlay used) were then added with sequencing provided by the Squarp Instruments 'Hermod+'. To process the Bass Station II further, it was sent through the eurorack setup using a couple Noise Engineering modules and the Befaco 'Oneiroi'.

The Novation 'Peak', Sequential 'OB-6 Desktop', and Korg 'Minilogue XD' and 'Arp 2600M' were added next to provide bass, melodic and ambient drone content. Last added was some additional drums/samples provided by the Elektron 'Digitakt II'."

Schlappy Minutes - 2025 Compilation

video upload by SCHLAPPI ENGINEERING and Stazma

"As advertised...
All the Schlappy Minutes of the year, for you here in one place.
Have fun!!

More infos on all modules at:
https://schlappiengineering.com

Time stamps to all the patches:
00:00 Intro
00:35 Nibbler Chiptune Arp
01:38 Angle Grinder Pings
02:37 BTFLD Noise Generator
03:37 BTFLD Burst Generator
04:37 Angle Grinder 808 Style Kick+
05:38 Three Body Chords
06:34 Drume Machine Destruction
07:34 Stereo Sine & Co-Sine
08:35 Stereo Saw & Co-Saw
09:32 BTFLD CV to Gates
10:30 Boundary Layer Triple Envelope Follower
11:35 Boundary Layer Multi Modulation
12:41 Boundary Layer Transient Generator
13:45 Boundary Layer Cascading Envelopes
14:50 Three Body DX7 Style Algo FM
17:49 Nibbler Reset & Sub
18:42 Drone Part.1
19:41 Drone Part.2
20:43 Bound as Velocity
21:43 BTFLD Parallel Fuzz
22:39 Nibbler Chiptune Scratch
23:42 Boundary Layer Gate Delay
24:58 Band Reject Filter
26:27 Three Body Hard Sync
28:08 No Sine Phase Mod (stay till the end)

#eurorack #modularsynth #modularsynthesizer"

Boundary Layer Triple Slew - Schlappy Patching 2025 EP.20

video upload by SCHLAPPI ENGINEERING and Stazma

"Hey there!
Today I'll show you how to patch the Boundary Layer as a triple slew limiter to use with three oscillators to create interesting drifts in tracking.

Have fun!!"

Transformation by Parallel Worlds

"Parallel Worlds - 'Transformation' CD album/Digital Download, Now available in Bandcamp!

CD is limited-edition of 100 copies. its Glass-Mastered.

Digital Download is NAME YOUR PRICE for the first 3 days!

All tracks composed, arranged and produced by Bakis Sirros during 2023-2025.

Thanks to: friends and family, John Sirros, Alessandro Vaccaro, Mamonu, Ingo Zobel, Dimitris Pavlidis, Angelos Ioakimoglou, Andreas Vamvakaris.

Machines used:
Eurorack modular (including modules by Qu-Bit, Synthesis Technology, Make Noise, Verbos, Instruo, Xaoc Devices, Intellijel, Frap Tools, Doepfer, 4ms company, Noise Engineering, ADDAC System, Analogue Solutions, Buchla Tiptop Audio, Befaco, Schlappi Engineering, Neuzeit, Strymon and others)
 Analogue Systems RS-Integrator modular,Korg SQ-64
,Korg Drumlogue
,Korg Wavestate

facebook.com/parallelworldsmusic

Mastered by Lorenzo Montana'

Artwork by LoMo"

"Granular" Filter Trick - Klavis Mixwitch

video upload by Stazma and SCHLAPPI ENGINEERING

"Roll your own 'granular' filter!

All you need is a sequencial or adressable switch to plug various outputs of any multi mode filter into it and then run it at audio rate. I'll show you how to patch this with the Klavis's Mixwitch and Schlappi Engineering's Angle Grinder.

It worked and here is how!"

100 Grit Feedback Tricks - Schlappy Patching 2025 EP.19

video upload by SCHLAPPI ENGINEERING and Stazma

"New year for Schlappy Patching!

Hey there!
Today I'll show you how to patch a voltage controled feedback loop in the 00 Grit so you can control the effect some of normaled connections make by using just an external VCA and a modulation source of your choice.

Have fun!!"

Sequencing a glitchy pattern feat XOR Nerdseq - Schlappy Patching 2025 EP.18

video upload by SCHLAPPI ENGINEERING and Stazma

"New year for Schlappy Patching!

Hey there!
Today I'll show you how I used an external sequencer (XOR Electronics's Nerdseq) to sequencer some glitchy beats and a bassline on the Schlappy Patching system.
This might of interest for those who are curious about how to use an external sequencer with their Schlappi modules.

Have fun!!"

Nibbler Noise Fest - Schlappy Patching 2025 EP.15

video upload by SCHLAPPI ENGINEERING and Stazma

"Hey there!
Today I'll show you how to use the Nibbler asa weird digital noise source and explore some patching using this same noise (scratch, percussions and more).

Have fun!!"

Stereo Doom Acid? - Schlappy Patching 2025 EP.15

video upload by SCHLAPPI ENGINEERING and Stazma

"Hey there!
Today I'll show you how to usetwo 100 Grit as a stereo pair to create wiiiide weird sound (another weirdo acid bassline / drone in that case).

Have fun!!"

BTFLD Parallel Fuzz | The Schlappy Minute

video upload by Stazma and SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I quickly show you how to use BTFLD as fuzz tone and how to mix it with the original signal into a 100 Grit."

Velocity Bound | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I quickly show you how to use the bound input on Boundary Layer (also work with Boundary) as a velocity control for your keyboard or sequencer."

Boundary Layer Stereo Filter? - Schlappy Patching 2025 EP.13

video upload by SCHLAPPI ENGINEERING

"Today I'll show you how to use the Boundary Layer as a mono to stereo weird filter."

Drone | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I quickly show you how to use the Three Body and 100 Grit together to create some big sounding drone."

Three Body & FM Algorithms | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I get into how to use the Three Body as a kind of typical FM (Frequency Modulation) tone generator and how to think the three different VCO as operators and 'algorithms'."

Cascading Envelopes | The Schlappy Minute

video upload by SCHLAPPI ENGINEERING

"This is the Schlappy Minute.

Today I show you how to use the Boundary Layer as three cascading envelopes, firing off one after the other, to create "strumming" type articulations."

Boundary Layer Synth Voice - Schlappy Patching 2025 EP.10

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

It's been a while!
In this one we are going to check how to use the new Boundary Layer module as a full synth voice, and process it with the Angle Grinder, as well as the BTFLD and 100 Grit.

Have fun!!"

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.