diff --git a/core/audio/misc/circular_audio_buffer.h b/core/audio/misc/circular_audio_buffer.h
index 6b360aa..7c0e076 100644
--- a/core/audio/misc/circular_audio_buffer.h
+++ b/core/audio/misc/circular_audio_buffer.h
@@ -46,10 +46,22 @@ public:
     }
 
 
-    circular_audio_buffer(uint32_t InCapacity) {
+    explicit circular_audio_buffer(uint32_t InCapacity) {
         SetCapacity(InCapacity);
     }
 
+    // move
+    circular_audio_buffer(circular_audio_buffer&& InOther) noexcept {
+        InternalBuffer = std::move(InOther.InternalBuffer);
+        Capacity = InOther.Capacity;
+        ReadCounter.store(InOther.ReadCounter);
+        WriteCounter.store(InOther.WriteCounter);
+
+        InOther.Capacity = 0;
+        InOther.ReadCounter = 0;
+        InOther.WriteCounter = 0;
+    }
+
     void Reset(uint32_t InCapacity = 0) {
         SetCapacity(InCapacity);
     }
@@ -276,5 +288,8 @@ public:
     }
 };
 
+using ui_buffer_type = circular_audio_buffer<float>;
+using ui_buffer_vector_type = std::vector<ui_buffer_type>;
+
 #undef checkf
 #undef check
\ No newline at end of file
diff --git a/core/audio/mixer/mixer_track.h b/core/audio/mixer/mixer_track.h
index 7147849..ca55690 100644
--- a/core/audio/mixer/mixer_track.h
+++ b/core/audio/mixer/mixer_track.h
@@ -20,9 +20,6 @@ struct mixer_track_link {
 
 class mixer_track {
 public:
-    using ui_buffer_type = circular_audio_buffer<float>;
-    using ui_buffer_vector_type = std::vector<ui_buffer_type>;
-
     explicit mixer_track(mixer_track_type in_type) : type_(in_type) {
         ui_buffers = std::make_shared<ui_buffer_vector_type>();
     }
diff --git a/core/audio/plugin_host/plugin_host.cpp b/core/audio/plugin_host/plugin_host.cpp
index 58d3d00..d1e2204 100644
--- a/core/audio/plugin_host/plugin_host.cpp
+++ b/core/audio/plugin_host/plugin_host.cpp
@@ -7,6 +7,16 @@ plugin_host::~plugin_host() {
     delete channel;
 }
 
+void plugin_host::on_update_buffer_size(int buffer_size)
+{
+    ui_buffers = std::make_shared<ui_buffer_vector_type>();
+    for (uint32_t i = 0; i < get_output_channels(); i++)
+    {
+        ui_buffer_type buffer(buffer_size * 3);
+        ui_buffers->emplace_back(std::move(buffer));
+    }
+}
+
 void plugin_host::try_open_editor() {
     if (!has_editor())
         return;
diff --git a/core/audio/plugin_host/plugin_host.h b/core/audio/plugin_host/plugin_host.h
index 13f04fd..744077a 100644
--- a/core/audio/plugin_host/plugin_host.h
+++ b/core/audio/plugin_host/plugin_host.h
@@ -3,6 +3,7 @@
 #include <string>
 #include <vector>
 #include "extern.h"
+#include "audio/misc/circular_audio_buffer.h"
 #include "misc/delegates.h"
 
 class mixer_track;
@@ -19,7 +20,7 @@ public:
     [[nodiscard]] virtual bool is_enabled() const = 0;
 
     virtual void on_update_sample_rate(double sample_rate) = 0;
-    virtual void on_update_buffer_size(int buffer_size) = 0;
+    virtual void on_update_buffer_size(int buffer_size);
     [[nodiscard]] virtual uint32_t get_input_channels() const = 0;
     [[nodiscard]] virtual uint32_t get_output_channels() const = 0;
     virtual void update_channel_node_name() {}
@@ -46,6 +47,7 @@ public:
     channel_interface* channel = nullptr;
     std::vector<mixer_track*> owner_tracks;
     bool editor_opened = false;
+    std::shared_ptr<ui_buffer_vector_type> ui_buffers;
 protected:
     void create_and_open_editor();
     void destroy_editor();
diff --git a/core/audio/plugin_host/vst2/vst2_plugin_host.cpp b/core/audio/plugin_host/vst2/vst2_plugin_host.cpp
index 25ff103..a477cd9 100644
--- a/core/audio/plugin_host/vst2/vst2_plugin_host.cpp
+++ b/core/audio/plugin_host/vst2/vst2_plugin_host.cpp
@@ -183,6 +183,7 @@ void vst2_plugin_host::on_update_sample_rate(double sample_rate) {
 }
 
 void vst2_plugin_host::on_update_buffer_size(int buffer_size) {
+    plugin_host::on_update_buffer_size(buffer_size);
     dispatch(effSetBlockSize, 0, buffer_size);
 }
 
@@ -217,6 +218,10 @@ void vst2_plugin_host::update_channel_node_name() {
 void vst2_plugin_host::process(uint32_t frame_num) {
     // TODO send midi
     effect_->processReplacing(effect_, channel->get_input_headers(), channel->get_output_headers(), frame_num);
+    for (int i = 0; i < ui_buffers->size(); ++i)
+    {
+        ui_buffers->at(i).Push(channel->get_output_headers()[i], frame_num);
+    }
 }
 
 void vst2_plugin_host::idle_editor() {