yui-LPF

a Low Pass Filter for KORG NTS-1

yui-LPF is a 4th order Low Pass Filter (-24dB/oct) for KORG Nu:tekt NTS-1.

• an Effect Unit in MODFX slot, made with logue-SDK
• knob A: cutoff freq
• knob B: resonance

It may run on KORG prologue or minilogue xd but is not tested.

Binary Release

Download yui-LPF.zip and unzip.

• download yui-LPF.x.y-z.zip from Releases
• open yui-LPF.x.y-z.zip to unzip and get yui-LPF.ntkdigunit.

Transfer yui-LPF.ntkdigunit to your NTS-1 with "NTS-1 digital Librarian"

• SEE: https://www.korg.com/products/dj/nts_1/librarian_contents.php

Source and Build Procedure

• NOTE: the example below is on macOS but others may be similar.
• NOTE: you may need install Xcode or Xcode Command Line Tools on macOS.

install logue-SDK

 [somewhere]$ git clone https://github.com/korginc/logue-sdk.git
 [somewhere]$ cd logue-sdk
 [somewhere/logue-sdk]$ git submodule update --init

• SEE: https://korginc.github.io/logue-sdk/
• SEE: https://korginc.github.io/logue-sdk/ja/

install GCC toolchain for logue-SDK

 [somewhere/logue-sdk]$ cd tools/gcc
 [somewhere/logue-sdk/tools/gcc]$ less README.md
 [somewhere/logue-sdk/tools/gcc]$ uname -s
Darwin
 [somewhere/logue-sdk/tools/gcc]$ ./get_gcc_osx.sh

• SEE: https://github.com/korginc/logue-sdk/tree/master/tools/gcc

install GNU make

 [somewhere/logue-sdk/tools/gcc]$ cd ../make
 [somewhere/logue-sdk/tools/make]$ less README.md
 [somewhere/logue-sdk/tools/make]$ uname -s
Darwin
 [somewhere/logue-sdk/tools/make]$ which make
/usr/bin/make    // you already have it.

• SEE: https://github.com/korginc/logue-sdk/tree/master/tools/make

install ZIP

 [somewhere/logue-sdk/tools/make]$ cd ../zip
 [somewhere/logue-sdk/tools/zip]$ less README.md
 [somewhere/logue-sdk/tools/zip]$ uname -s
Darwin
 [somewhere/logue-sdk/tools/zip]$ which zip
/usr/bin/zip    // you already have it.

• SEE: https://github.com/korginc/logue-sdk/tree/master/tools/zip

install logue-cli

 [somewhere/logue-sdk/tools/zip]$ cd ../logue-cli
 [somewhere/logue-sdk/tools/logue-cli]$ less README.md
 [somewhere/logue-sdk/tools/logue-cli]$ uname -s
Darwin
 [somewhere/logue-sdk/tools/logue-cli]$ ./get_logue_cli_osx.sh
 [somewhere/logue-sdk/tools/logue-cli]$ ls
README.md			get_logue_cli_msys64.sh*
get_logue_cli_linux.sh*		get_logue_cli_osx.sh*
get_logue_cli_msys.sh*		logue-cli-osx-0.07-2b/
 [somewhere/logue-sdk/tools/logue-cli]$ ls logue-cli-osx-0.07-2b
EULA.md*	logue-cli*
 [somewhere/logue-sdk/tools/logue-cli]$ ln -s logue-cli-osx-0.07-2b/logue-cli .
 [somewhere/logue-sdk/tools/logue-cli]$ ls -l logue-cli
lrwxr-xr-x  1 user  staff  31  5  1 09:38 logue-cli@ -> logue-cli-osx-0.07-2b/logue-cli
 [somewhere/logue-sdk/tools/logue-cli]$ cd ../../..

• SEE: https://github.com/korginc/logue-sdk/tree/master/tools/logue-cli

git clone [yui-LPF] and build binary

 [somewhere]$ git clone https://github.com/technomover/yui-LPF.git
 [somewhere]$ ls
logue-sdk/	yui-LPF/
 [somewhere]$ cd yui-LPF/modfx/projects/yui-LPF
 [somewhere/yui-LPF/modfx/projects/yui-LPF]$ ./build.sh
 [somewhere/yui-LPF/modfx/projects/yui-LPF]$ ls yui-LPF.*unit
yui-LPF.mnlgxdunit	yui-LPF.ntkdigunit	yui-LPF.prlgunit

CONNECT your NTS-1 to transfer

 [somewhere/yui-LPF/modfx/projects/yui-LPF]$ ../../../../logue-sdk/tools/logue-cli/logue-cli probe
Error: Could not find matching logue MIDI ports.

Logue interface connection failed.
  Available MIDI inputs:
    in  0: NTS-1 digital kit NTS-1 digital _ KBD/KNOB

  Available MIDI ouputs:
    out 0: NTS-1 digital kit NTS-1 digital _ SOUND

 [somewhere/yui-LPF/modfx/projects/yui-LPF]$ ../../../../logue-sdk/tools/logue-cli/logue-cli probe --inport 0 --outport 0
> Device: nutekt digital
> System version: 1.20
> Logue API version: 1.01-0
> Available modules:

Modulation FX: [ slot_count: 16, max_payload_size: 8180, max_load_size: 6144 ]
Delay FX: [ slot_count: 8, max_payload_size: 16368, max_load_size: 12288 ]
Reverb FX: [ slot_count: 8, max_payload_size: 16368, max_load_size: 12288 ]
Oscillator: [ slot_count: 16, max_payload_size: 36848, max_load_size: 32768 ]

 [somewhere/yui-LPF/modfx/projects/yui-LPF]$ ../../../../logue-sdk/tools/logue-cli/logue-cli load --inport 0 --outport 0 --slot 1 --unit yui-LPF.ntkdigunit
> Parsing nutekt digital unit archive
> Parsing manifest
> Parsing unit binary payload
> Handshaking...
> Target platform: "nutekt digital"
> Target module: "Modulation FX"
size: 82c crc32: 8ecb59fc

or run the utilty script (need fit it to your environment)

 [somewhere/yui-LPF/modfx/projects/yui-LPF]$ ./trans-ntk.sh

misc.

Edit yui-LPF.cpp if you want customize the filter.

example:

    you can turn it to a -12db/oct or -36db/oct LPF with a few line of modification.

#define NumCas 2  // Number of Filter Cascade: 2 (4-pole)
static dsp::BiQuad yui_Filter	// define our BiQuad instances
[NumCh][NumCas] = {		// TODO: shoud able to change NumCh and NumCas
  { dsp::BiQuad(), dsp::BiQuad() },
  { dsp::BiQuad(), dsp::BiQuad() }
};

BUILD and (if succeed it) TRANS for rapid development and debug (on B-shell)

 [somewhere/yui-LPF/modfx/projects/yui-LPF]$ ./build.sh && ./trans-ntk.sh

Acknowledgement

• kaz saita / kinoshita-lab
  • thanks to his lecture at NI-SUI
  • and his many other great works
• centrevillage
  • thanks to his lecture at NI-SUI
  • this project uses logue-sdk-template