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tidied up envelope

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This commit is contained in:
Gordon JC Pearce 2024-10-16 14:15:38 +01:00
parent 84eef25f8d
commit 34800af7a1
3 changed files with 17 additions and 13 deletions
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24
plugin/ic29.cpp
View File

@ -23,10 +23,10 @@ Synth ic29;
Synth::Synth() {
d_debug("initialising synth\n");
envAtk = atkTable[0];
envDcy = dcyTable[90];
envRls = dcyTable[10];
envStn = 0xfff;
envAtk = 0x20;
envDcy = 0x50;
envStn = 0x1f;
envRls = 0x3f;
portaCoeff = 0x0;
}
@ -76,25 +76,27 @@ Envelope::Envelope() {
}
void Envelope::run() {
uint16_t tempStn = ic29.envStn << 6;
switch (phase) {
case ENV_ATK:
level += ic29.envAtk;
level += atkTable[ic29.envAtk];
if (level > 0x3fff) {
level = 0x3fff;
phase = ENV_DCY;
}
break;
case ENV_DCY:
if (level > ic29.envStn) {
level -= ic29.envStn;
level = (level * ic29.envDcy) >> 16;
level += ic29.envStn;
if (level > tempStn) {
// level = ((level * ic29.envDcy) >> 16;
level = (((level - tempStn) * dcyTable[ic29.envDcy]) >> 16) + tempStn;
} else {
level = ic29.envStn;
level = tempStn;
}
break;
case ENV_RLS:
level = (level * ic29.envRls) >> 16;
level = (level * dcyTable[ic29.envRls]) >> 16;
break;
case ENV_IDLE:
default:

2
plugin/ic29.hpp
View File

@ -45,6 +45,8 @@ class Envelope {
ENV_RLS,
ENV_IDLE
} phase;
static const uint16_t atkTable[128];
static const uint16_t dcyTable[128];
};
class Voice {

4
plugin/ic29tables.hpp
View File

@ -20,7 +20,7 @@
#include "ic29.hpp"
extern const uint16_t atkTable[] = {
const uint16_t Envelope::atkTable[128] = {
0x4000, 0x2000, 0x1000, 0x0aaa, 0x0800, 0x0666, 0x0555, 0x0492, 0x0400,
0x038e, 0x0333, 0x02e9, 0x02ab, 0x0276, 0x0249, 0x0222, 0x0200, 0x01e2,
0x01c7, 0x01af, 0x0199, 0x0186, 0x0174, 0x0164, 0x0155, 0x0148, 0x013b,
@ -37,7 +37,7 @@ extern const uint16_t atkTable[] = {
0x001d, 0x001c, 0x001c, 0x001b, 0x001b, 0x001a, 0x0019, 0x0018, 0x0017,
0x0016, 0x0015};
extern const uint16_t dcyTable[128] = {
const uint16_t Envelope::dcyTable[128] = {
0x1000, 0x3000, 0x5000, 0x7000, 0x9000, 0xa000, 0xa800, 0xb000, 0xb800,
0xc000, 0xc800, 0xd000, 0xd800, 0xe000, 0xe800, 0xf000, 0xf080, 0xf100,
0xf180, 0xf200, 0xf280, 0xf300, 0xf380, 0xf400, 0xf480, 0xf500, 0xf580,