BeRo1985

Linked Modulators in Sobanth

Overview

Linked modulators (also known as "modulator-to-modulator" connections) are a feature of the SoundFont 2 specification that allows one modulator's output to be used as the input source for another modulator. This enables complex modulation routings that would be impossible with simple generator-targeting modulators alone.

Note: Sobanth was one of the first (if not the first) software SoundFont synthesizers to implement linked modulator support, predating FluidSynth's failed implementation attempt. As noted in the FluidSynth issue tracker:

"One more comment: unless I missed something in the spec, then linked modulators are a little 'under specified'. Meaning that there is no single correct way to implement linked modulators."

BeRo1985

// Copyright 2024, Benjamin 'BeRo' Rosseaux - zlib licensed

////////////////////////////
// QTangent based variant // 
////////////////////////////

// The qtangent based variant has a better precision than the octahedron/diamond based variant below. 

// 10bit 10bit 9bit for the 3 smaller components of the quaternion and 1bit for the sign of the bitangent and 2bit for the 
// largest component index for the reconstruction of the largest component of the quaternion.

BeRo1985

// Code (C) by Benjamin 'BeRo' Rosseaux - zlib licensed

// ...

#extension GL_EXT_control_flow_attributes : enable

// ...

uint resolution = pushConstants.resolution;
uint squaredResolution = pushConstants.resolution * pushConstants.resolution;

BeRo1985

// Code (C) by Benjamin 'BeRo' Rosseaux - zlib licensed

// Based on the ideas from Stephen Cameron's https://scaryreasoner.wordpress.com/2016/01/23/thoughts-on-tesselating-a-sphere/ blog post.

// ...

void getCubeSphereNormals(const in int face, in vec4 uv0011, out vec3 vectors[4]){
  const float deltaAngle = 1.5707963267948966; // radians(90.0);
  const float startAngle = 0.7853981633974483; // radians(45.0);
  const vec3 normals[6] = vec3[6](

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// GLSL Octahedral Texture Mapping with Edge Mirroring and Catmull-Rom Interpolation (by Benjamin 'BeRo' Rosseaux)

ivec2 wrapOctahedralTexelCoordinates(const in ivec2 texel, const in ivec2 texSize) {
  ivec2 wrapped = ((texel % texSize) + texSize) % texSize;
  return ((((abs(texel.x / texSize.x) + int(texel.x < 0)) ^ (abs(texel.y / texSize.y) + int(texel.y < 0))) & 1) != 0) ? (texSize - (wrapped + ivec2(1))) : wrapped;
}

vec4 textureCatmullRomCoefficents(const in float v){
  float t = v, tt = t * t, ttt = tt * t;
  return vec4((tt - (ttt * 0.5)) - (0.5 * t), ((ttt * 1.5) - (tt * 2.5)) + 1.0, ((tt * 2.0) - (ttt * 1.5)) + (t * 0.5), (ttt * 0.5) - (tt * 0.5));  

BeRo1985

// GLSL Octahedral Texture Mapping with Edge Mirroring and Bilinear Interpolation (by Benjamin 'BeRo' Rosseaux)

ivec2 wrapOctahedralTexelCoordinates(const in ivec2 texel, const in ivec2 texSize) {
  ivec2 wrapped = ((texel % texSize) + texSize) % texSize;
  return ((((abs(texel.x / texSize.x) + int(texel.x < 0)) ^ (abs(texel.y / texSize.y) + int(texel.y < 0))) & 1) != 0) ? (texSize - (wrapped + ivec2(1))) : wrapped;
}

vec4 textureOctahedralMap(const in sampler2D tex, vec3 direction) {
  direction = normalize(direction); // just for to make sure that it is normalized 
  vec2 uv = direction.xy / (abs(direction.x) + abs(direction.y) + abs(direction.z));

BeRo1985

// Fast date functions for FreePascal and Delphi - Pascal implementation by Benjamin Rosseaux - [email protected] - Public Domain
// Based on: https://www.youtube.com/watch?v=J9KijLyP-yg - Implementing Fast Calendar Algorithms: Speeding Date - Cassio Neri - C++ on Sea 2023
unit PasFastDateUtils; 
{$ifdef fpc}
 {$mode delphi}
{$endif}

interface

uses SysUtils,Math;

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// Multisampled SDF for text rendering (4x AA with single texture lookup, 16x with four lookups)
// It is for SDF text rendering with 16x antialiasing with only four texture lookups, where an 
// SDF texture texel in turn also has four individual SDF values in the RGBA color channels in 
// a 4-Rook/RGSS sampling pattern.

// Copyright (C) 2022, Benjamin 'BeRo' Rosseaux - License: Unlicense ( http://unlicense.org/ )

const float SQRT_0_DOT_5 = sqrt(0.5);

#if FILLTYPE == FILLTYPE_ATLAS_TEXTURE

BeRo1985

So here's a pretty neat thing, I use VHD's to organize the space on my computer. You can too!

• Click Start

• Type in the search bar "Disk par" =>

• Click first result =>

• In the program, click "Action" =>

BeRo1985

procedure TEngineMIDIEventList.FindInterval(const aResultList:TEngineMIDIEventDynamicArrayList;const aFromTime,aToTime:TEngineTime);
var Lower,Upper,Mid,Index,StartIndex,MinIndex,MaxIndex,
    EventFromIndex,EventToIndex,NextStartIndex,TryIndex:SizeInt;
    Event,TemporaryEvent:TEngineMIDIEvent;
    FromTime,NextFromTime,EventFromTime,EventToTime,
    MinEventTime,MaxEventTime:TEngineTime;
    DoAdd:boolean;
begin
 if fCount>0 then begin