Unit symbol has only one param now, not multiple in a tuple, added string representation for a qty

lasp/device/lasp_daq.pyx

@@ -163,7 +163,11 @@ cdef class Daq:
         daqconfig = &(pydaqconfig.config)
         devinfo = &(pydevinfo.devinfo)
 
-        self.daq_device = cppDaq.createDaq(devinfo[0], daqconfig[0])
+        try:
+            self.daq_device = cppDaq.createDaq(devinfo[0], daqconfig[0])
+        except Exception as e:
+            print(e)
+            raise
         self.nFramesPerBlock = self.daq_device.framesPerBlock()
         self.samplerate = self.daq_device.samplerate()
 

lasp/device/lasp_daqconfig.pyx

@@ -8,7 +8,7 @@ Description:
 Data Acquistiion (DAQ) device descriptors, and the DAQ devices themselves
 
 """
-__all__ = ['DaqChannel', 'DaqConfiguration',  'DaqConfigurations']
+__all__ = ['DaqConfiguration',  'DaqConfigurations']
 from ..lasp_common import lasp_shelve, SIQtys, Qty
 from .lasp_device_common import DaqChannel
 import json

lasp/device/lasp_deviceinfo.pyx

@@ -42,6 +42,28 @@ cdef class DeviceInfo:
         return self.devinfo.prefSampleRateIndex
 
     @property
+    def prefSampleRate(self):
+        return self.availableSampleRates[
+            self.prefSampleRateIndex]
+
+    @property
+    def prefFramesPerBlockIndex(self):
+        return self.devinfo.prefFramesPerBlockIndex
+
+    @property
+    def prefFramesPerBlock(self):
+        return self.availableFramesPerBlock[
+            self.prefFramesPerBlockIndex]
+
+    @property
+    def prefDataTypeIndex(self):
+        return self.devinfo.prefDataTypeIndex
+
+    @property
+    def prefDataType(self):
+        return self.availableDataTypes[
+            self.prefDataTypeIndex]
+    @property
     def hasInputIEPE(self):
         return self.devinfo.hasInputIEPE
 

lasp/lasp_common.py

@@ -52,18 +52,22 @@ class Qty:
     level_ref_name: str
     level_ref_value: str
 
+    def __str__(self):
+        return self.name + f' [{self.unit_symb}]'
+
+
 
 class SIQtys:
     N = Qty(name='Number',
             unit_name='No unit / full scale',
-            unit_symb=('-'),
+            unit_symb='-',
             level_unit=('dBFS',),
             level_ref_name=('Full scale sine wave',),
             level_ref_value=(dBFS_REF,)
            )
     AP = Qty(name='Acoustic Pressure',
              unit_name='Pascal',
-             unit_symb=('Pa', 'muPa'),
+             unit_symb='Pa',
              level_unit=('dB SPL','dBPa'),
              level_ref_name=('2 micropascal', '1 pascal',),
              level_ref_value=(P_REF, 1)
@@ -71,13 +75,13 @@ class SIQtys:
 
     V = Qty(name='Voltage',
              unit_name='Volt',
-             unit_symb='V',
+             unit_symb=('V'),
              level_unit=('dBV',), # dBV
              level_ref_name=('1V',),
              level_ref_value=(1.0,),
            )
     types = (N, AP, V)
-    default = N
+    default = AP
     default_index = 0
 
     @staticmethod