Matrix Mic - User's Guide
Tools Menu
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View Configuration Summary - Generates a listing the contents of the current Configuration. You can save it as a file or print it.
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Refresh Devices - If you add or remove any USB audio devices (USB microphones, USB soundcards, or other non-USB hot swappable devices) while the program is running, you will need to perform Refresh Devices. This will reacquire connected audio devices from Windows and reset the user interface so that they are selectable from the pull down menus. User configuration settings from the current Audio Configuration are carried forward if possible.
Device indexes are assigned in the order that Windows detects each device. Thus Device index numbers (Device 0, 1, 2 etc) may change if you have move a device from one USB connection port to another or when devices are added or removed from the PC. If Device indexes change, it will affect your Output Group setups and you will likely need to modify them. A best practice, if possible, is to avoid moving a USB connected device from one USB port to another to avoid Device index changes.
There is also a Refresh Devices toolbar button for convenience.