diff --git a/sdl2-hyper-sonic-drivers/CMakeLists.txt b/sdl2-hyper-sonic-drivers/CMakeLists.txt
index c3c44dde..9a19cc5c 100644
--- a/sdl2-hyper-sonic-drivers/CMakeLists.txt
+++ b/sdl2-hyper-sonic-drivers/CMakeLists.txt
@@ -103,6 +103,7 @@ target_sources(${LIB_NAME} PRIVATE
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/MIDDriver.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/midi/IMidiDriver.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/midi/IMidiChannel.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/midi/IMidiChannelVoice.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/westwood/ADLDriver.cpp
 
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/midi/scummvm/MidiDriver_BASE.cpp
@@ -113,6 +114,7 @@ target_sources(${LIB_NAME} PRIVATE
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/midi/scummvm/MidiDriver_ADLIB.cpp
 
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/midi/opl/OplDriver.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/midi/opl/OplChannel.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.cpp
 
     ${CMAKE_CURRENT_SOURCE_DIR}/src/HyperSonicDrivers/drivers/opl/OplWriter.cpp
diff --git a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/IMidiChannel.hpp b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/IMidiChannel.hpp
index a406cddb..9f747160 100644
--- a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/IMidiChannel.hpp
+++ b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/IMidiChannel.hpp
@@ -2,6 +2,7 @@
 
 #include <cstdint>
 #include <list>
+#include <HyperSonicDrivers/drivers/midi/IMidiChannelVoice.hpp>
 
 namespace HyperSonicDrivers::drivers::midi
 {
@@ -24,7 +25,7 @@ namespace HyperSonicDrivers::drivers::midi
         const bool isPercussion;
 
     protected:
-
+        std::list<IMidiChannelVoice> m_voices;
         // MIDI Events
         //virtual void noteOff(const uint8_t note) noexcept = 0;
         //virtual void noteOn(const uint8_t note, const uint8_t vol) noexcept = 0;
diff --git a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/IMidiChannelVoice.hpp b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/IMidiChannelVoice.hpp
index 3175dc3b..96108508 100644
--- a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/IMidiChannelVoice.hpp
+++ b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/IMidiChannelVoice.hpp
@@ -1,10 +1,12 @@
 #pragma once
 
 #include <cstdint>
-#include <HyperSonicDrivers/drivers/midi/IMidiChannel.hpp>
+//#include <HyperSonicDrivers/drivers/midi/IMidiChannel.hpp>
 
 namespace HyperSonicDrivers::drivers::midi
 {
+    class IMidiChannel;
+
     /**
     * Interface for Midi Channel Voice message to have a polyphonic MidiChannel.
     * this is mono-phonic channel, multiple combination of this gives a polyphonic MidiChannel
@@ -15,14 +17,32 @@ namespace HyperSonicDrivers::drivers::midi
         IMidiChannelVoice() = default;
         virtual ~IMidiChannelVoice() = default;
 
+        inline IMidiChannel* getChannel() const noexcept { return m_channel; }
+        uint8_t getChannelNum() const noexcept;
+        inline uint8_t getNote() const noexcept { return m_note; }
+        inline uint8_t getVolume() const noexcept { return m_volume; };
+        void setVolumes(const uint8_t volume) noexcept;
+        inline bool isFree() const noexcept { return m_free; }
+        inline bool isVibrato() const noexcept { return m_vibrato; }
+
     protected:
         IMidiChannel* m_channel = nullptr;  // MIDI channel
         uint8_t m_note = 0;                 /* note number */
         uint8_t m_volume = 0;               /* note volume */
+        uint8_t m_real_volume = 0;          /* adjusted note volume */
         int16_t m_pitch_factor = 0;         /* pitch-wheel value */
         bool m_free = true;
-        bool m_sustain = false;
-        bool m_vibrato = false;
+        bool m_sustain = false; // this are Opl exclusive or are midi?
+        bool m_vibrato = false; // ""
+ 
+    private:
+        /// <summary>
+        /// The volume is between 0-127 as a per MIDI specification.
+        /// OPLWriter expect a MIDI volume value and converts to OPL value.
+        /// OPL chips has a volume attenuation (inverted values)
+        /// range from 0-64 inverted (0 is max, 64 is muted).
+        /// </summary>
+        uint8_t calcVolume_() const noexcept;
     };
 
 }
diff --git a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.cpp b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.cpp
index 6d8e0cb3..ec0ef3fd 100644
--- a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.cpp
+++ b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.cpp
@@ -2,17 +2,16 @@
 #include <HyperSonicDrivers/drivers/midi/opl/OplVoice.hpp>
 #include <HyperSonicDrivers/hardware/opl/OPL2instrument.h>
 #include <HyperSonicDrivers/utils/ILogger.hpp>
+#include <HyperSonicDrivers/drivers/midi/IMidiChannel.hpp>
 
 namespace HyperSonicDrivers::drivers::midi::opl
 {
     using audio::midi::MIDI_PERCUSSION_CHANNEL;
     using hardware::opl::OPL2instrument_t;
 
-
     constexpr int VIBRATO_THRESHOLD = 40;
     constexpr int8_t HIGHEST_NOTE = 127;
 
-
     OplVoice::OplVoice(const uint8_t slot, const drivers::opl::OplWriter* oplWriter) :
         m_slot(slot), m_oplWriter(oplWriter)
     {
@@ -194,10 +193,4 @@ namespace HyperSonicDrivers::drivers::midi::opl
 
         m_instr = instr;
     }
-
-    void OplVoice::setVolumes(const uint8_t volume) noexcept
-    {
-        m_volume = volume;
-        m_real_volume = calcVolume_();
-    }
 }
diff --git a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.hpp b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.hpp
index 5a3d50e2..d64148ea 100644
--- a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.hpp
+++ b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/midi/opl/OplVoice.hpp
@@ -5,12 +5,12 @@
 #include <HyperSonicDrivers/audio/opl/banks/OP2Bank.hpp>
 #include <HyperSonicDrivers/hardware/opl/OPL2instrument.h>
 #include <HyperSonicDrivers/drivers/opl/OplWriter.hpp>
-#include <HyperSonicDrivers/drivers/midi/IMidiChannel.hpp>
 
 namespace HyperSonicDrivers::drivers::midi::opl
 {
     constexpr int opl_sustain_threshold = 64;
 
+
     /// <summary>
     /// This is only the execution for a MidiChannel
     /// used in a MIDI Channel -> Opl Channel
@@ -24,7 +24,6 @@ namespace HyperSonicDrivers::drivers::midi::opl
         /// <summary>
         /// It might release the note depending on sustains value
         /// </summary>
-        /// <param name="channel"></param>
         /// <param name="note"></param>
         /// <param name="sustain"></param>
         /// <returns>true = voice released. false=voice sutained</returns>
@@ -50,43 +49,22 @@ namespace HyperSonicDrivers::drivers::midi::opl
         void pause() const noexcept;
         void resume() const noexcept;
 
-        void setVolumes(const uint8_t volume) noexcept;
-        //
-        //inline IMidiChannel* getChannel() const noexcept { return m_channel; }
-        inline uint8_t getChannelNum() const noexcept { return m_channel->channel; }
         inline const hardware::opl::OPL2instrument_t* getInstrument() const noexcept { return m_instr; }
 
         // Methods to get private variables, not really used
         inline uint8_t getSlot() const noexcept { return m_slot; }
-        inline bool isFree() const noexcept { return m_free; }
         inline bool isSecondary() const noexcept { return m_secondary; }
-        inline bool isVibrato() const noexcept { return m_vibrato; }
-        inline uint8_t getNote() const noexcept { return m_note; }
 
     protected:
         void setInstrument(const hardware::opl::OPL2instrument_t* instr) noexcept;
-        //inline uint8_t getRealVolume() const noexcept { return m_real_volume; }
-        //inline void setRealVolume(const uint8_t volume) noexcept { m_real_volume = calcVolume_(); }
 
     private:
+        const drivers::opl::OplWriter* m_oplWriter;
         const uint8_t m_slot;                        /* OPL channel number */
-        uint8_t m_real_volume = 0;                  /* adjusted note volume */
         uint8_t m_real_note  = 0;                   /* adjusted note number */
         int8_t  m_finetune = 0;                     /* frequency fine-tune */
         const hardware::opl::OPL2instrument_t* m_instr = nullptr; /* current instrument */
 
         bool m_secondary = false;
-
-        const drivers::opl::OplWriter* m_oplWriter;
-
-        /// <summary>
-        /// The volume is between 0-127 as a per MIDI specification.
-        /// OPLWriter expect a MIDI volume value and converts to OPL value.
-        /// OPL chips has a volume attenuation (inverted values)
-        /// range from 0-64 inverted (0 is max, 64 is muted).
-        /// </summary>
-        inline uint8_t calcVolume_() const noexcept {
-            return  std::min<uint8_t>((static_cast<uint32_t>(m_volume) * m_channel->volume / 127), 127);
-        }
     };
 }
diff --git a/sdl2-hyper-sonic-drivers/test/HyperSonicDrivers/drivers/midi/opl/TestOplVoice.cpp b/sdl2-hyper-sonic-drivers/test/HyperSonicDrivers/drivers/midi/opl/TestOplVoice.cpp
index b347a423..6cfa27af 100644
--- a/sdl2-hyper-sonic-drivers/test/HyperSonicDrivers/drivers/midi/opl/TestOplVoice.cpp
+++ b/sdl2-hyper-sonic-drivers/test/HyperSonicDrivers/drivers/midi/opl/TestOplVoice.cpp
@@ -7,6 +7,7 @@
 #include <HyperSonicDrivers/hardware/opl/OPL2instrument.h>
 #include <HyperSonicDrivers/files/dmx/OP2File.hpp>
 #include <HyperSonicDrivers/hardware/opl/OPLMock.hpp>
+#include <HyperSonicDrivers/drivers/midi/IMidiChannel.hpp>
 
 namespace HyperSonicDrivers::drivers::midi::opl
 {