You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
221 lines
6.6 KiB
221 lines
6.6 KiB
/**
|
|
Example project for the Stereo Plate reverb audio component
|
|
(c) 31.12.2020 by Piotr Zapart www-hexefx.com
|
|
|
|
Attention!!! Works with Teensy 4.x only!
|
|
|
|
The audio path follows a typical scheme used in mixing consoles
|
|
where the reverb is put into aux path.
|
|
Each source (like i2s or PlaySDWav etc) has a Reverb Send Level control
|
|
The Stereo reverb output is mixed then with the dry signals using the output mixers.
|
|
|
|
|
|
*/
|
|
|
|
#include <Arduino.h>
|
|
#include "Audio.h"
|
|
#include "effect_platervbstereo.h"
|
|
|
|
#define I2S_REVERB_SEND_CH 0
|
|
#define SDWAV_REVERB_SEND_CH 1
|
|
#define REVERB_MIX_CH 1
|
|
#define I2S_MIX_CH 0
|
|
|
|
AudioPlaySdWav playSdWav;
|
|
AudioInputI2S i2s_in;
|
|
AudioMixer4 reverb_send_L;
|
|
AudioMixer4 reverb_send_R;
|
|
AudioEffectPlateReverb reverb;
|
|
AudioMixer4 mixer_out_L;
|
|
AudioMixer4 mixer_out_R;
|
|
AudioOutputI2S i2s_out;
|
|
|
|
AudioConnection patchCord1(playSdWav, 0, reverb_send_L, 1); // wav player L reverb send
|
|
AudioConnection patchCord2(playSdWav, 0, mixer_out_L, 2); // wav player L into output mixer
|
|
AudioConnection patchCord3(playSdWav, 1, reverb_send_R, 1); // wav player R reverb send
|
|
AudioConnection patchCord4(playSdWav, 1, mixer_out_R, 2); // wav player R into output mixer
|
|
|
|
AudioConnection patchCord5(i2s_in, 0, mixer_out_L, 0); // i2s out L into output mixer
|
|
AudioConnection patchCord6(i2s_in, 1, mixer_out_R, 0); // i2s out R into output mixer
|
|
|
|
AudioConnection patchCord7(i2s_in, 0, reverb_send_L, 0); // i2s out reverb send L
|
|
AudioConnection patchCord8(i2s_in, 1, reverb_send_R, 0); // i2s out reverb send R
|
|
|
|
AudioConnection patchCord9(reverb_send_L, 0, reverb, 0); // reverb inputs
|
|
AudioConnection patchCord10(reverb_send_R, 0, reverb, 1);
|
|
|
|
AudioConnection patchCord11(reverb, 0, mixer_out_L, 1); // reverb out into output mixer
|
|
AudioConnection patchCord12(reverb, 1, mixer_out_R, 1);
|
|
|
|
AudioConnection patchCord13(mixer_out_L, 0, i2s_out, 0); // output mixers -> codec DAC
|
|
AudioConnection patchCord14(mixer_out_R, 0, i2s_out, 1);
|
|
|
|
AudioControlSGTL5000 codec;
|
|
|
|
|
|
uint32_t timeLast = 0, timeNow = 0;
|
|
|
|
void flexRamInfo(void);
|
|
void i2s_set_rev_send(float32_t lvl);
|
|
void reverb_set_volume(float32_t lvl);
|
|
void wav_set_rev_send(float32_t lvl);
|
|
|
|
void setup()
|
|
{
|
|
Serial.begin(115200);
|
|
//while(!Serial);
|
|
delay(1000);
|
|
Serial.println("--------------------------");
|
|
Serial.println("T40_GFX - stereo plate reverb");
|
|
#ifdef REVERB_USE_DMAMEM
|
|
Serial.println("DMAMEM is used for reverb buffers");
|
|
#endif
|
|
AudioMemory(12);
|
|
codec.enable();
|
|
codec.volume(0.0); // headphones not used
|
|
codec.inputSelect(AUDIO_INPUT_LINEIN);
|
|
codec.lineInLevel(2);
|
|
codec.lineOutLevel(31);
|
|
flexRamInfo();
|
|
|
|
i2s_set_rev_send(0.7);
|
|
reverb_set_volume(0.6);
|
|
|
|
reverb.size(1.0); // max reverb length
|
|
reverb.lowpass(0.3); // sets the reverb master lowpass filter
|
|
reverb.lodamp(0.1); // amount of low end loss in the reverb tail
|
|
reverb.hidamp(0.2); // amount of treble loss in the reverb tail
|
|
reverb.diffusion(1.0); // 1.0 is the detault setting, lower it to create more "echoey" reverb
|
|
|
|
}
|
|
|
|
void loop()
|
|
{
|
|
timeNow = millis();
|
|
if (timeNow - timeLast > 1000)
|
|
{
|
|
Serial.print("Reverb CPU load = ");
|
|
Serial.println(reverb.processorUsageMax());
|
|
timeLast = timeNow;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
void flexRamInfo(void)
|
|
{ // credit to FrankB, KurtE and defragster !
|
|
#if defined(__IMXRT1052__) || defined(__IMXRT1062__)
|
|
int itcm = 0;
|
|
int dtcm = 0;
|
|
int ocram = 0;
|
|
Serial.print("FlexRAM-Banks: [");
|
|
for (int i = 15; i >= 0; i--)
|
|
{
|
|
switch ((IOMUXC_GPR_GPR17 >> (i * 2)) & 0b11)
|
|
{
|
|
case 0b00:
|
|
Serial.print(".");
|
|
break;
|
|
case 0b01:
|
|
Serial.print("O");
|
|
ocram++;
|
|
break;
|
|
case 0b10:
|
|
Serial.print("D");
|
|
dtcm++;
|
|
break;
|
|
case 0b11:
|
|
Serial.print("I");
|
|
itcm++;
|
|
break;
|
|
}
|
|
}
|
|
Serial.print("] ITCM: ");
|
|
Serial.print(itcm * 32);
|
|
Serial.print(" KB, DTCM: ");
|
|
Serial.print(dtcm * 32);
|
|
Serial.print(" KB, OCRAM: ");
|
|
Serial.print(ocram * 32);
|
|
#if defined(__IMXRT1062__)
|
|
Serial.print("(+512)");
|
|
#endif
|
|
Serial.println(" KB");
|
|
extern unsigned long _stext;
|
|
extern unsigned long _etext;
|
|
extern unsigned long _sdata;
|
|
extern unsigned long _ebss;
|
|
extern unsigned long _flashimagelen;
|
|
extern unsigned long _heap_start;
|
|
|
|
Serial.println("MEM (static usage):");
|
|
Serial.println("RAM1:");
|
|
|
|
Serial.print("ITCM = FASTRUN: ");
|
|
Serial.print((unsigned)&_etext - (unsigned)&_stext);
|
|
Serial.print(" ");
|
|
Serial.print((float)((unsigned)&_etext - (unsigned)&_stext) / ((float)itcm * 32768.0) * 100.0);
|
|
Serial.print("% of ");
|
|
Serial.print(itcm * 32);
|
|
Serial.print("kb ");
|
|
Serial.print(" (");
|
|
Serial.print(itcm * 32768 - ((unsigned)&_etext - (unsigned)&_stext));
|
|
Serial.println(" Bytes free)");
|
|
|
|
Serial.print("DTCM = Variables: ");
|
|
Serial.print((unsigned)&_ebss - (unsigned)&_sdata);
|
|
Serial.print(" ");
|
|
Serial.print((float)((unsigned)&_ebss - (unsigned)&_sdata) / ((float)dtcm * 32768.0) * 100.0);
|
|
Serial.print("% of ");
|
|
Serial.print(dtcm * 32);
|
|
Serial.print("kb ");
|
|
Serial.print(" (");
|
|
Serial.print(dtcm * 32768 - ((unsigned)&_ebss - (unsigned)&_sdata));
|
|
Serial.println(" Bytes free)");
|
|
|
|
Serial.println("RAM2:");
|
|
Serial.print("OCRAM = DMAMEM: ");
|
|
Serial.print((unsigned)&_heap_start - 0x20200000);
|
|
Serial.print(" ");
|
|
Serial.print((float)((unsigned)&_heap_start - 0x20200000) / ((float)512 * 1024.0) * 100.0);
|
|
Serial.print("% of ");
|
|
Serial.print(512);
|
|
Serial.print("kb");
|
|
Serial.print(" (");
|
|
Serial.print(512 * 1024 - ((unsigned)&_heap_start - 0x20200000));
|
|
Serial.println(" Bytes free)");
|
|
|
|
Serial.print("FLASH: ");
|
|
Serial.print((unsigned)&_flashimagelen);
|
|
Serial.print(" ");
|
|
Serial.print(((unsigned)&_flashimagelen) / (2048.0 * 1024.0) * 100.0);
|
|
Serial.print("% of ");
|
|
Serial.print(2048);
|
|
Serial.print("kb");
|
|
Serial.print(" (");
|
|
Serial.print(2048 * 1024 - ((unsigned)&_flashimagelen));
|
|
Serial.println(" Bytes free)");
|
|
|
|
#endif
|
|
}
|
|
|
|
void i2s_set_rev_send(float32_t lvl)
|
|
{
|
|
lvl = constrain(lvl, 0.0, 1.0);
|
|
reverb_send_L.gain(I2S_REVERB_SEND_CH, lvl);
|
|
reverb_send_R.gain(I2S_REVERB_SEND_CH, lvl);
|
|
}
|
|
|
|
|
|
void reverb_set_volume(float32_t lvl)
|
|
{
|
|
lvl = constrain(lvl, 0.0, 1.0);
|
|
mixer_out_L.gain(REVERB_MIX_CH, lvl);
|
|
mixer_out_R.gain(REVERB_MIX_CH, lvl);
|
|
}
|
|
|
|
void wav_set_rev_send(float32_t lvl)
|
|
{
|
|
lvl = constrain(lvl, 0.0, 1.0);
|
|
reverb_send_L.gain(SDWAV_REVERB_SEND_CH, lvl);
|
|
reverb_send_R.gain(SDWAV_REVERB_SEND_CH, lvl);
|
|
}
|
|
|