diff --git a/pyrelacs/ui/mainwindow.py b/pyrelacs/ui/mainwindow.py
index 73c1d1c..4ae1954 100644
--- a/pyrelacs/ui/mainwindow.py
+++ b/pyrelacs/ui/mainwindow.py
@@ -1,4 +1,5 @@
 from pathlib import Path as path
+from re import I
 
 from PyQt6.QtGui import QAction, QIcon, QKeySequence
 from PyQt6.QtCore import Qt, QSize, QThreadPool, QTimer
@@ -72,9 +73,9 @@ class PyRelacs(QMainWindow):
         widget.setLayout(layout)
         self.setCentralWidget(widget)
 
-        self.buffer = CircBuffer(size=500)
+        self.buffer = CircBuffer(size=1_000_000, samplerate=20)
         self.connect_dac()
-        self.daq_producer = DaqProducer(self.buffer, self.daq_device)
+        self.daq_producer = DaqProducer(self.buffer, self.daq_device, [1, 1])
         self.plot_daq()
 
     def create_actions(self):
@@ -190,6 +191,7 @@ class PyRelacs(QMainWindow):
         self.data = list(range(10))
         self.line = self.daq_plot.plot(self.time, self.data, pen=pen)
 
+        self.item_index = 0
         self.timer = QTimer()
         self.timer.setInterval(50)
         self.timer.timeout.connect(self.update_plot)
@@ -200,9 +202,15 @@ class PyRelacs(QMainWindow):
         self.time = self.time[1:]
         self.time.append(self.time[-1] + 1)
         self.data = self.data[1:]
-        try:
-            item = self.buffer.get(self.buffer.write_index() - 1)
-        except IndexError:
+        log.debug(self.buffer.totocount())
+        if self.buffer.totocount() > 20:
+            try:
+                log.debug(self.item_index)
+                item = self.buffer.get(self.item_index)
+                self.item_index += 1
+            except IndexError:
+                item = 0
+        else:
             item = 0
 
         self.data.append(item)
@@ -236,10 +244,8 @@ class PyRelacs(QMainWindow):
 
     def disconnect_dac(self):
         try:
-            log.debug(f"{self.daq_device}")
             self.daq_device.disconnect()
             self.daq_device.release()
-            log.debug(f"{self.daq_device}")
             self.daq_disconnect_button.setDisabled(True)
             self.daq_connect_button.setEnabled(True)
         except AttributeError:
@@ -260,6 +266,7 @@ class PyRelacs(QMainWindow):
     def on_exit(self):
         log.info("exit button!")
         self.add_to_textfield("exiting")
+        self.disconnect_dac()
         self.close()
 
     def on_about(self, e):