Are SpikerBoxes calibrated in volts?

Now that we are moving all of our devices to USB… we can finally calibrate SpikeRecorder. Traditionally, we used the analog in (mic) port for recordings which meant we did not know what the volume was set to on the SpikerBox, or how the different phones attenuated the signals. But thanks to our begrudgingly slow move to USB… we can now capture the signals at the source and tell SpikerRecorder what the voltage was of your signal. (Note that spikes are measured in low milliVolts (mV) or 100s of microVolts (uV).