diff --git a/src/qtgui/iq_tool.cpp b/src/qtgui/iq_tool.cpp
index 8375db8e96..a5bc711757 100644
--- a/src/qtgui/iq_tool.cpp
+++ b/src/qtgui/iq_tool.cpp
@@ -46,10 +46,13 @@ CIqTool::CIqTool(QWidget *parent) :
     is_playing = false;
     bytes_per_sample = 8;
     sample_rate = 192000;
+    playback_sample_rate = 192000;
     rec_len = 0;
     center_freq = 1e8;
 
     //ui->recDirEdit->setText(QDir::currentPath());
+    ui->sampleRateSpinBox->setValue(playback_sample_rate);
+    ui->centerFreqSpinBox->setValue(center_freq);
 
     recdir = new QDir(QDir::homePath(), "*.raw");
 
@@ -74,6 +77,8 @@ CIqTool::~CIqTool()
 void CIqTool::setSampleRate(qint64 sr)
 {
     sample_rate = sr;
+    playback_sample_rate = sr;
+    ui->sampleRateSpinBox->setValue(sr / 1000.0);
 
     if (!current_file.isEmpty())
     {
@@ -84,7 +89,6 @@ void CIqTool::setSampleRate(qint64 sr)
     }
 }
 
-
 /*! \brief Slot activated when the user selects a file. */
 void CIqTool::on_listWidget_currentTextChanged(const QString &currentText)
 {
@@ -93,7 +97,7 @@ void CIqTool::on_listWidget_currentTextChanged(const QString &currentText)
     QFileInfo info(*recdir, current_file);
 
     parseFileName(currentText);
-    rec_len = (int)(info.size() / (sample_rate * bytes_per_sample));
+    rec_len = (int)(info.size() / (playback_sample_rate * bytes_per_sample));
 
     // Get duration of selected recording and update label
     refreshTimeWidgets();
@@ -128,7 +132,7 @@ void CIqTool::on_playButton_clicked(bool checked)
             ui->listWidget->setEnabled(false);
             ui->recButton->setEnabled(false);
             emit startPlayback(recdir->absoluteFilePath(current_file),
-                               (float)sample_rate, center_freq);
+                               (float)playback_sample_rate, center_freq);
         }
     }
     else
@@ -160,7 +164,7 @@ void CIqTool::on_slider_valueChanged(int value)
 {
     refreshTimeWidgets();
 
-    qint64 seek_pos = (qint64)(value)*sample_rate;
+    qint64 seek_pos = (qint64)(value)*playback_sample_rate;
     emit seek(seek_pos);
 }
 
@@ -278,6 +282,16 @@ void CIqTool::on_recDirButton_clicked()
         ui->recDirEdit->setText(dir);
 }
 
+void CIqTool::on_centerFreqSpinBox_valueChanged(double value)
+{
+    center_freq = value * 1000.0;
+}
+
+void CIqTool::on_sampleRateSpinBox_valueChanged(double value)
+{
+    playback_sample_rate = value * 1000.0;
+}
+
 void CIqTool::timeoutFunction(void)
 {
     refreshDir();
@@ -373,7 +387,7 @@ void CIqTool::parseFileName(const QString &filename)
     center = list.at(3).toLongLong(&center_ok);
 
     if (sr_ok)
-        sample_rate = sr;
+        ui->sampleRateSpinBox->setValue(sr / 1000.0);
     if (center_ok)
-        center_freq = center;
+        ui->centerFreqSpinBox->setValue(center / 1000.0);
 }
diff --git a/src/qtgui/iq_tool.h b/src/qtgui/iq_tool.h
index cb8da0f5b1..62c3f16b51 100644
--- a/src/qtgui/iq_tool.h
+++ b/src/qtgui/iq_tool.h
@@ -79,6 +79,8 @@ private slots:
     void on_playButton_clicked(bool checked);
     void on_slider_valueChanged(int value);
     void on_listWidget_currentTextChanged(const QString &currentText);
+    void on_centerFreqSpinBox_valueChanged(double value);
+    void on_sampleRateSpinBox_valueChanged(double value);
     void timeoutFunction(void);
 
 private:
@@ -98,6 +100,7 @@ private slots:
     bool    is_recording;
     bool    is_playing;
     int     bytes_per_sample;  /*!< Bytes per sample (fc = 4) */
+    int     playback_sample_rate;       /*!< Playback sample rate. */
     int     sample_rate;       /*!< Current sample rate. */
     qint64  center_freq;       /*!< Center frequency. */
     int     rec_len;           /*!< Length of a recording in seconds */
diff --git a/src/qtgui/iq_tool.ui b/src/qtgui/iq_tool.ui
index e28618dd1d..50d21f08fc 100644
--- a/src/qtgui/iq_tool.ui
+++ b/src/qtgui/iq_tool.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>482</width>
+    <width>499</width>
     <height>327</height>
    </rect>
   </property>
@@ -209,6 +209,80 @@
      </property>
     </widget>
    </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout_3">
+     <item>
+      <widget class="QLabel" name="sampleRateLabel">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="minimumSize">
+        <size>
+         <width>0</width>
+         <height>0</height>
+        </size>
+       </property>
+       <property name="text">
+        <string>Sample Rate, ksps</string>
+       </property>
+       <property name="scaledContents">
+        <bool>false</bool>
+       </property>
+       <property name="alignment">
+        <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QDoubleSpinBox" name="sampleRateSpinBox">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="decimals">
+        <number>3</number>
+       </property>
+       <property name="maximum">
+        <double>999999.989999999990687</double>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLabel" name="Frequency">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="text">
+        <string>Frequency, kHz</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QDoubleSpinBox" name="centerFreqSpinBox">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="decimals">
+        <number>3</number>
+       </property>
+       <property name="maximum">
+        <double>99999999.989999994635582</double>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
    <item>
     <widget class="QFrame" name="frame">
      <property name="minimumSize">