From 8259addaf634f69f20eee7c5a9d65326fe486eda Mon Sep 17 00:00:00 2001
From: Holger Wirtz <wirtz@parasitstudio.de>
Date: Mon, 30 Jan 2023 10:50:41 +0100
Subject: [PATCH] Fixes after some hint from PJRC forum
 (https://forum.pjrc.com/threads/29276-Limits-of-delay-effect-in-audio-library)

---
 .../examples/AudioDelay8M/AudioDelay8M.ino    | 14 ++++++++++++--
 .../src/effect_delay_ext8.cpp                 | 19 +++++++++++++++----
 2 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/third-party/effect_delay_ext8/examples/AudioDelay8M/AudioDelay8M.ino b/third-party/effect_delay_ext8/examples/AudioDelay8M/AudioDelay8M.ino
index cd2d432..8182615 100644
--- a/third-party/effect_delay_ext8/examples/AudioDelay8M/AudioDelay8M.ino
+++ b/third-party/effect_delay_ext8/examples/AudioDelay8M/AudioDelay8M.ino
@@ -6,7 +6,7 @@
 // GUItool: begin automatically generated code
 AudioSynthWaveformSine   sine1;          //xy=382,432
 AudioAmplifier           amp1;           //xy=606,441
-AudioEffectDelayExternal delayExt1;      //xy=770,321
+AudioEffectDelayExternal8 delayExt1(AUDIO_MEMORY8_PSRAM_8MB,20000);      //xy=770,321
 AudioMixer4              mixer1;         //xy=983,386
 AudioOutputI2S           i2s1;           //xy=1131,343
 AudioConnection          patchCord1(sine1, amp1);
@@ -20,6 +20,10 @@ AudioControlSGTL5000     sgtl5000;     //xy=943,541
 
 
 void setup() {
+  Serial.begin(230400);
+  delay(50);
+  Serial.println("<setup begin>");
+
   AudioMemory(100);
 
   sgtl5000.enable();
@@ -33,18 +37,24 @@ void setup() {
   sgtl5000.autoVolumeDisable();
   sgtl5000.surroundSoundDisable();
   sgtl5000.enhanceBassDisable();
-  delayExt1.delay(0,100);
+  delayExt1.delay(0,333);
+  delayExt1.delay(1,664);
+  delayExt1.delay(2,1000);
   sine1.amplitude(1.0);
   sine1.frequency(440);
   sine1.phase(0.0);
   mixer1.gain(0,0.5);
   mixer1.gain(1,1.0);
   amp1.gain(1.0);
+
+  Serial.println("<setup end>");
 }
 
 void loop() {
+  Serial.print("<SINE ON>");
   amp1.gain(1.0);
   delay(200);
   amp1.gain(0.0);
+  Serial.println("<SINE OFF>");
   delay(2000);
 }
diff --git a/third-party/effect_delay_ext8/src/effect_delay_ext8.cpp b/third-party/effect_delay_ext8/src/effect_delay_ext8.cpp
index a8ddfc7..c5b3140 100644
--- a/third-party/effect_delay_ext8/src/effect_delay_ext8.cpp
+++ b/third-party/effect_delay_ext8/src/effect_delay_ext8.cpp
@@ -50,10 +50,21 @@
 
 //#define SPIRAM_CS_PIN 6
 
-#define SPIRAM_MOSI_PIN 11 //-----------------
-#define SPIRAM_MISO_PIN 12 // for Teensy 4.1
-#define SPIRAM_SCK_PIN 13 //
-#define SPIRAM_CS_PIN 36 //-----------------
+//#define SPIRAM_MOSI_PIN 11 //-----------------
+//#define SPIRAM_MISO_PIN 12 // for Teensy 4.1 audio board
+//#define SPIRAM_SCK_PIN 13 //
+//#define SPIRAM_CS_PIN 36 //-----------------
+			 //
+#define SPIRAM_MOSI_PIN 50 //----------------- https://forum.pjrc.com/attachment.php?attachmentid=20853&d=1593888859
+#define SPIRAM_MISO_PIN 54 // for Teensy 4.1
+#define SPIRAM_SCK_PIN 49 //-----------------
+#define SPIRAM_CS_PIN 52 // CS???
+//#define SPIRAM_CS_PIN 36 // CS0-2
+//#define SPIRAM_CS_PIN 37 // CS0-1
+//#define SPIRAM_CS_PIN 44 // CS2
+//#define SPIRAM_CS_PIN 10 // CS0
+//#define SPIRAM_CS_PIN 0 // CS1
+//#define SPIRAM_CS_PIN 38 // CS1-0
 			 //
 #define MEMBOARD_CS0_PIN 2
 #define MEMBOARD_CS1_PIN 3