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- DSP button - in addition to the analog filters, the Intan chips also have an on-chip DSP high cut filter for removing the DC offset on each channel. This can be toggled on and off by clicking the "DSP" button (yellow = on), and the cutoff frequency can be changed by typing a value into the associated text box. Again, there are only certain values for the cutoff frequency; the chip will choose the one closest to what you selected and return this value to the GUI.
- Audio output - the "Audio OutAUDIO OUT" interface will allow you select up to 2 channels to preview in real time, directly from the acquisition board/evaluation board. There is an audio jack (see the red circle in the picture below) that's connected to the first two analog output channels (CH1 and CH2 of the Digital & Analog I/O for L and R sound outputs). To select a channel for monitoring, click on one of the two Audio Out buttons, then open the Channel Selector drawer on the right of the module. Make sure the "PARAM" tab is selected, and click on any of the available channels. This can be repeated for the other button, such that the left and right audio outputs can be set to different channels. Alternatively, you can specify one or more channels in the "AUDIO" tab of the Channel Selector drawer to each of the Audio Out AUDIO OUT buttons and control the volume and the threshold (Gate) by adjusting the two sliders at the top of the application window (see below). NOTE: The "AUDIO" tab is used to configure the software audio monitor (this method may suffer a bit from latency and artifact), while the "PARAM" tab is used for the hardware audio monitor (the audio output can be connected to the jack on the board or CH1 and CH2 of the Digital & Analog I/O for L and R sound outputs).
- Noise slicer - sets the threshold for the noise slicer on the hardware audio outputs (sets any values below threshold to zero, to improve the signal-to-noise ratio). In practice, this doesn't work particularly well.
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