diff --git a/examples/examples-stream/streams-generator-r2r/streams-generator-r2r.ino b/examples/examples-stream/streams-generator-r2r/streams-generator-r2r.ino
index 818e02530..36da48321 100644
--- a/examples/examples-stream/streams-generator-r2r/streams-generator-r2r.ino
+++ b/examples/examples-stream/streams-generator-r2r/streams-generator-r2r.ino
@@ -13,6 +13,7 @@ SineWaveGenerator<int16_t> sineWave;                       // subclass of SoundG
 GeneratedSoundStream<int16_t> sound(sineWave);             // Stream generated from sine wave
 R2ROutput out; 
 StreamCopy copier(out, sound);                             // copies sound into i2s
+const int pins1[] = {13,12,14,27,26,25, 33, 32};           // r2r pins 32 is least significant
 
 // Arduino Setup
 void setup(void) {  
@@ -26,7 +27,7 @@ void setup(void) {
   auto config = out.defaultConfig();
   config.copyFrom(info); 
   // 8 pins for 8 bit DAC for channel 1
-  config.channel1_pins = {13,12,14,27,26,25, 33, 32};
+  config.channel1_pins = pins1;
   // channel 2 would be config.channel2_pins
   out.begin(config);
 
diff --git a/src/AudioBasic/Collections/Vector.h b/src/AudioBasic/Collections/Vector.h
index f69825126..d2a750fa4 100644
--- a/src/AudioBasic/Collections/Vector.h
+++ b/src/AudioBasic/Collections/Vector.h
@@ -136,6 +136,16 @@ class Vector {
     this->len = copyFrom.size();
   }
 
+  /// convert from c array
+  template <typename TT, int N>
+  Vector(TT (&a)[N]) {
+    resize_internal(N, false);
+    for (int j = 0; j < N; j++) {
+      p_data[j] = a[j];
+    }
+    this->len = N;
+  }
+
   /// copy operator
   Vector<T> &operator=(Vector<T> &copyFrom) {
     resize_internal(copyFrom.size(), false);
diff --git a/src/AudioLibs/R2ROutput.h b/src/AudioLibs/R2ROutput.h
index c5f608f1a..bfaac0d75 100644
--- a/src/AudioLibs/R2ROutput.h
+++ b/src/AudioLibs/R2ROutput.h
@@ -5,8 +5,7 @@
 #include "AudioTools/AudioLogger.h"
 #include "AudioTools/AudioOutput.h"
 #include "AudioTools/Buffers.h"
-#include "vector"
-
+#include "AudioBasic/Collections/Vector.h"
 namespace audio_tools {
 
 /**
@@ -18,8 +17,8 @@ namespace audio_tools {
 
 class R2RDriverBase {
  public:
-  virtual void setupPins(std::vector<int> &channel1_pins,
-                         std::vector<int> &channel2_pins) = 0;
+  virtual void setupPins(Vector<int> &channel1_pins,
+                         Vector<int> &channel2_pins) = 0;
 
   virtual void writePins(int channels, int channel, unsigned uvalue) = 0;
 };
@@ -34,8 +33,8 @@ class R2RDriverBase {
 
 class R2RDriver : public R2RDriverBase {
  public:
-  void setupPins(std::vector<int> &channel1_pins,
-                         std::vector<int> &channel2_pins) override {
+  void setupPins(Vector<int> &channel1_pins,
+                         Vector<int> &channel2_pins) override {
     TRACED();
     p_channel1_pins = &channel1_pins;
     p_channel2_pins = &channel2_pins;
@@ -68,9 +67,8 @@ class R2RDriver : public R2RDriverBase {
   }
 
  protected:
-  std::vector<int> *p_channel1_pins = nullptr;
-  std::vector<int> *p_channel2_pins = nullptr;
-
+  Vector<int> *p_channel1_pins = nullptr;
+  Vector<int> *p_channel2_pins = nullptr;
 } r2r_driver;
 
 /**
@@ -81,8 +79,8 @@ class R2RDriver : public R2RDriverBase {
 
 class R2RConfig : public AudioInfo {
  public:
-  std::vector<int> channel1_pins;
-  std::vector<int> channel2_pins;
+  Vector<int> channel1_pins;
+  Vector<int> channel2_pins;
   uint16_t buffer_size = DEFAULT_BUFFER_SIZE;
   uint16_t buffer_count = 2;        // double buffer
   R2RDriverBase *driver = &r2r_driver;  // by default use Arduino driver