Correct spelling for Equailizer

Author: pschatzmann

README.md

@@ -8,7 +8,7 @@ Some basic __header-only C++ classes__ that can be used for __Audio Processing__
 - Helps to [communicate](https://github.com/pschatzmann/arduino-audio-tools/wiki/Communication) audio over the wire or wirelessly
 - Different [Sound Generators](https://pschatzmann.github.io/arduino-audio-tools/group__generator.html) (e.g. to generate a sine tone) for [GeneratedSoundStream](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_generated_sound_stream.html)
 - Support for [Sound Effects](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_audio_effect_stream.html) with different [Effect Implementations](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_audio_effect.html) (e.g. Boost, Distortion, Echo, Reverb...) for [AudioEffectStream](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_audio_effect_stream_t.html)
-- Provides a [3 Band Equalizer](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_equilizer3_bands.html)
+- Provides a [3 Band Equalizer](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_equalizer3_bands.html)
 - Different [Converters](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_base_converter.html) for [ConverterStream](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_converter_stream.html)
 - Different [Filters](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_filter.html) for [FilteredStream](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_filtered_stream.html)
 - [Musical Notes](https://pschatzmann.github.io/arduino-audio-tools/classaudio__tools_1_1_musical_notes.html) (with frequencies of notes)

examples/examples-communication/a2dp/basic-a2dp-eq-audiokit/README.md

@@ -1,10 +1,10 @@
-## Using the AI Thinker ESP32 Audio Kit as A2DP Receiver with Equilizer
+## Using the AI Thinker ESP32 Audio Kit as A2DP Receiver with Equalizer
 
 I found some cheap [AI Thinker ESP32 Audio Kit V2.2](https://docs.ai-thinker.com/en/esp32-audio-kit) on AliExpress.
 
 <img src="https://pschatzmann.github.io/Resources/img/audio-toolkit.png" alt="Audio Kit" />
 
-I am using the data callback of the A2DP library to feed the AudioBoardStream that will be controlled by an Equilizer
+I am using the data callback of the A2DP library to feed the AudioBoardStream that will be controlled by an Equalizer
 
 You dont need to bother about any wires because everything is on one nice board. Just just need to install the dependencies:
 

examples/examples-communication/a2dp/basic-a2dp-eq-audiokit/basic-a2dp-eq-audiokit.ino

@@ -14,7 +14,7 @@
 BluetoothA2DPSink a2dp_sink;
 AudioBoardStream kit(AudioKitEs8388V1); 
 Equilizer3Bands eq(kit);
-ConfigEquilizer3Bands cfg_eq;
+ConfigEqualizer3Bands cfg_eq;
 
 
 // Write data to AudioKit in callback

src/AudioTools/CoreAudio/AudioFilter.h

@@ -1,5 +1,5 @@
 #pragma once
 
 #include "AudioTools/CoreAudio/AudioFilter/Filter.h"
-#include "AudioTools/CoreAudio/AudioFilter/Equilizer.h"
+#include "AudioTools/CoreAudio/AudioFilter/Equalizer.h"
 #include "AudioTools/CoreAudio/AudioFilter/MedianFilter.h"

src/AudioTools/CoreAudio/AudioFilter/Equilizer.h renamed to src/AudioTools/CoreAudio/AudioFilter/Equalizer.h

@@ -6,28 +6,28 @@
 #include "AudioTools/CoreAudio/AudioStreams.h"
 
 /**
- * @defgroup equilizer Equilizer
+ * @defgroup equilizer Equalizer
  * @ingroup dsp
- * @brief Digital Equilizer
+ * @brief Digital Equalizer
  **/
 
 namespace audio_tools {
 
 /**
- * @brief Configuration for 3 Band Equilizer: Set
+ * @brief Configuration for 3 Band Equalizer: Set
  * channels,bits_per_sample,sample_rate.  Set and update gain_low, gain_medium
  * and gain_high to value between 0 and 1.0
  * @ingroup equilizer
  * @author pschatzmann
  */
-struct ConfigEquilizer3Bands : public AudioInfo {
-  ConfigEquilizer3Bands() {
+struct ConfigEqualizer3Bands : public AudioInfo {
+  ConfigEqualizer3Bands() {
     channels = 2;
     bits_per_sample = 16;
     sample_rate = 44100;
   }
 
-  ConfigEquilizer3Bands(const ConfigEquilizer3Bands &) = delete;
+  ConfigEqualizer3Bands(const ConfigEqualizer3Bands &) = delete;
 
   // Frequencies
   int freq_low = 880;
@@ -40,7 +40,7 @@ struct ConfigEquilizer3Bands : public AudioInfo {
 };
 
 /**
- * @brief 3 Band Equilizer inspired from
+ * @brief 3 Band Equalizer inspired from
  * https://www.musicdsp.org/en/latest/Filters/236-3-band-equaliser.html
  * @ingroup equilizer
  * @author pschatzmann
@@ -74,11 +74,11 @@ class Equilizer3Bands : public ModifyingStream {
   /// Defines/Changes the output target
   void setOutput(Print &out) override { p_print = &out; }
 
-  ConfigEquilizer3Bands &config() { return cfg; }
+  ConfigEqualizer3Bands &config() { return cfg; }
 
-  ConfigEquilizer3Bands &defaultConfig() { return config(); }
+  ConfigEqualizer3Bands &defaultConfig() { return config(); }
 
-  bool begin(ConfigEquilizer3Bands &config) {
+  bool begin(ConfigEqualizer3Bands &config) {
     p_cfg = &config;
     if (p_cfg->channels > max_state_count) {
       if (state != nullptr) delete[] state;
@@ -129,8 +129,8 @@ class Equilizer3Bands : public ModifyingStream {
   }
 
  protected:
-  ConfigEquilizer3Bands cfg;
-  ConfigEquilizer3Bands *p_cfg = &cfg;
+  ConfigEqualizer3Bands cfg;
+  ConfigEqualizer3Bands *p_cfg = &cfg;
   const float vsa = (1.0 / 4294967295.0);  // Very small amount (Denormal Fix)
   Print *p_print = nullptr;                // support for write
   Stream *p_stream = nullptr;              // support for write