diff --git a/cpp_src/device/lasp_daq.cpp b/cpp_src/device/lasp_daq.cpp
index 24374a2..7dfbdcd 100644
--- a/cpp_src/device/lasp_daq.cpp
+++ b/cpp_src/device/lasp_daq.cpp
@@ -44,22 +44,13 @@ Daq::Daq(const DeviceInfo &devinfo, const DaqConfiguration &config)
     : DaqConfiguration(config), DeviceInfo(devinfo) {
   DEBUGTRACE_ENTER;
 
-  if (duplexMode()) {
-    if (neninchannels() == 0) {
-      throw rte("Duplex mode enabled, but no input channels enabled");
-    }
-
-    if (nenoutchannels() == 0) {
-      throw rte("Duplex mode enabled, but no output channels enabled");
-    }
-  }
   if(!duplexMode() && monitorOutput) {
-    throw rte("Output monitoring only allowed when running in duplex mode");
+    throw rte("Duplex mode requires enabling both input and output channels. Please make sure at least one output channel is enabled, or disable hardware output loopback in DAQ configuration.");
   }
 
   if (!hasInternalOutputMonitor && monitorOutput) {
     throw rte(
-        "Output monitor flag set, but device does not have output monitor");
+        "Output monitor flag set, but device does not have hardware output monitor.");
   }
 
   if (!config.match(devinfo)) {
diff --git a/cpp_src/device/lasp_daqconfig.cpp b/cpp_src/device/lasp_daqconfig.cpp
index 3cde4a0..8f503f3 100644
--- a/cpp_src/device/lasp_daqconfig.cpp
+++ b/cpp_src/device/lasp_daqconfig.cpp
@@ -35,12 +35,14 @@ DaqConfiguration::DaqConfiguration(const DeviceInfo &device) {
   us i = 0;
   for (auto &inch : inchannel_config) {
     inch.name = "Unnamed input channel " + std::to_string(i);
+    inch.rangeIndex = device.prefInputRangeIndex;
     i++;
   }
 
   i = 0;
   for (auto &outch : outchannel_config) {
     outch.name = "Unnamed output channel " + std::to_string(i);
+    outch.rangeIndex = device.prefOutputRangeIndex;
     i++;
   }
 
diff --git a/cpp_src/device/lasp_deviceinfo.h b/cpp_src/device/lasp_deviceinfo.h
index 7d3d8ad..ffd221a 100644
--- a/cpp_src/device/lasp_deviceinfo.h
+++ b/cpp_src/device/lasp_deviceinfo.h
@@ -68,14 +68,26 @@ public:
   us prefFramesPerBlockIndex = 0;
 
   /**
-   * @brief Available ranges for the input,  i.e. +/- 1V and/or +/- 10 V etc.
+   * @brief Available ranges for the input, i.e. +/- 1V and/or +/- 10 V etc.
    */
   dvec availableInputRanges;
+
   /**
-   * @brief Its preffered range
+   * @brief Available ranges for the output, i.e. +/- 1V and/or +/- 10 V etc.
+   */
+  dvec availableOutputRanges;
+
+  /**
+   * @brief Its preffered input range
    */
   int prefInputRangeIndex = 0;
 
+  /**
+   * @brief Its preffered output range
+   */
+  int prefOutputRangeIndex = 0;
+
+
   /**
    * @brief The number of input channels available for the device
    */
@@ -125,13 +137,29 @@ public:
   bool duplexModeForced = false;
 
   /**
-   * @brief The physical quantity of the output signal. For 'normal' audio
+  * @brief Indicates whether the device is able to run in duplex mode. If false,
+  * devices cannot run in duplex mode, and the `duplexModeForced` flag is meaningless.
+  */
+  bool hasDuplexMode = false;
+
+  /**
+   * @brief The physical quantity of the input signal from DAQ. For 'normal' audio
+   * interfaces, this is typically a 'number' between +/- full scale. For some
+   * real DAQ devices however, the input quantity corresponds to a physical signal,
+   * such a Volts.
+   */
+
+  DaqChannel::Qty physicalInputQty = DaqChannel::Qty::Number;
+
+  /**
+   * @brief The physical quantity of the output signal from DAQ. For 'normal' audio
    * devices, this is typically a 'number' between +/- full scale. For some
-   * devices however, the output quantity corresponds to a physical signal,
+   * real DAQ devices however, the input quantity corresponds to a physical signal,
    * such a Volts.
    */
   DaqChannel::Qty physicalOutputQty = DaqChannel::Qty::Number;
 
+
   /**
    * @brief String representation of DeviceInfo
    *
diff --git a/cpp_src/device/lasp_rtaudiodaq.cpp b/cpp_src/device/lasp_rtaudiodaq.cpp
index f797fa0..c6acbb9 100644
--- a/cpp_src/device/lasp_rtaudiodaq.cpp
+++ b/cpp_src/device/lasp_rtaudiodaq.cpp
@@ -99,6 +99,7 @@ void fillRtAudioDeviceInfo(DeviceInfoList &devinfolist) {
       d.ninchannels = devinfo.inputChannels;
 
       d.availableInputRanges = {1.0};
+      d.availableOutputRanges = {1.0};
 
       RtAudioFormat formats = devinfo.nativeFormats;
       if (formats & RTAUDIO_SINT8) {
diff --git a/cpp_src/device/lasp_uldaq.cpp b/cpp_src/device/lasp_uldaq.cpp
index 04c21e5..b1f215e 100644
--- a/cpp_src/device/lasp_uldaq.cpp
+++ b/cpp_src/device/lasp_uldaq.cpp
@@ -68,6 +68,7 @@ void fillUlDaqDeviceInfo(DeviceInfoList &devinfolist) {
     }
 
     devinfo.physicalOutputQty = DaqChannel::Qty::Voltage;
+    devinfo.physicalInputQty = DaqChannel::Qty::Voltage;
 
     devinfo.availableDataTypes.push_back(
         DataTypeDescriptor::DataType::dtype_fl64);
@@ -79,7 +80,9 @@ void fillUlDaqDeviceInfo(DeviceInfoList &devinfolist) {
     devinfo.availableFramesPerBlock = {512, 1024, 2048, 4096, 8192};
 
     devinfo.availableInputRanges = {1.0, 10.0};
+    devinfo.availableOutputRanges = {10.0};
     devinfo.prefInputRangeIndex = 0;
+    devinfo.prefOutputRangeIndex = 0;
 
     devinfo.ninchannels = 4;
     devinfo.noutchannels = 1;
@@ -90,6 +93,7 @@ void fillUlDaqDeviceInfo(DeviceInfoList &devinfolist) {
 
     devinfo.hasInternalOutputMonitor = true;
 
+    devinfo.hasDuplexMode = true;
     devinfo.duplexModeForced = true;
 
     // Finally, this devinfo is pushed back in list
diff --git a/cpp_src/pybind11/lasp_deviceinfo.cpp b/cpp_src/pybind11/lasp_deviceinfo.cpp
index 6034fcc..880f065 100644
--- a/cpp_src/pybind11/lasp_deviceinfo.cpp
+++ b/cpp_src/pybind11/lasp_deviceinfo.cpp
@@ -29,6 +29,9 @@ void init_deviceinfo(py::module& m) {
   devinfo.def_readonly("availableInputRanges",
                        &DeviceInfo::availableInputRanges);
   devinfo.def_readonly("prefInputRangeIndex", &DeviceInfo::prefInputRangeIndex);
+  devinfo.def_readonly("availableOutputRanges",
+                       &DeviceInfo::availableOutputRanges);
+  devinfo.def_readonly("prefOutputRangeIndex", &DeviceInfo::prefOutputRangeIndex);
 
   devinfo.def_readonly("ninchannels", &DeviceInfo::ninchannels);
   devinfo.def_readonly("noutchannels", &DeviceInfo::noutchannels);
@@ -36,7 +39,10 @@ void init_deviceinfo(py::module& m) {
   devinfo.def_readonly("hasInputACCouplingSwitch",
                        &DeviceInfo::hasInputACCouplingSwitch);
 
+  devinfo.def_readonly("hasDuplexMode", &DeviceInfo::hasDuplexMode);
+  devinfo.def_readonly("duplexModeForced", &DeviceInfo::duplexModeForced);
+  devinfo.def_readonly("hasInternalOutputMonitor", &DeviceInfo::hasInternalOutputMonitor);
+  
+  devinfo.def_readonly("physicalInputQty", &DeviceInfo::physicalInputQty);
   devinfo.def_readonly("physicalOutputQty", &DeviceInfo::physicalOutputQty);
-
 }
-
diff --git a/pyproject.toml b/pyproject.toml
index 8126b17..7eca1e7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ requires-python = ">=3.10"
 description = "Library for Acoustic Signal Processing"
 license = { "file" = "LICENSE" }
 authors = [{ "name" = "J.A. de Jong", "email" = "j.a.dejong@ascee.nl" }]
-version = "1.2.0"
+version = "1.3.0"
 
 keywords = ["DSP", "DAQ", "Signal processing"]
 
diff --git a/python_src/lasp/lasp_common.py b/python_src/lasp/lasp_common.py
index 2594b37..c0c69ba 100644
--- a/python_src/lasp/lasp_common.py
+++ b/python_src/lasp/lasp_common.py
@@ -62,8 +62,9 @@ class Qty:
     name: str
     # I.e.: Pascal
     unit_name: str
-    # I.e.: Pa
+    # I.e.: -, Pa, V
     unit_symb: str
+
     # I.e.: ('dB SPL') <== tuple of possible level units
     level_unit: object
     # Contains a tuple of possible level names, including its reference value.
@@ -92,6 +93,18 @@ class Qty:
         """
         return self.cpp_enum.value
 
+    @property
+    def unit_symb_eq(self):
+        """Unit symbol to be used in equations
+
+        Returns:
+            String: V, Pa, 1,
+        """
+        if self.unit_symb != '-':
+            return self.unit_symb
+        else:
+            return '1'
+
 
 
 @unique