This file describes the change history for DVTool v 1.04: PTT button is now greyed out if you cannot transmit. Added audio in/out to saved preferences. Changed threading to make time slices more consistent. Added PPC Mac support. Changed dvtool.bat to print out "last heard" in dos window. v 1.03: Made the PTT button larger and made it default to a true PTT mode. A lock checkbox was added to make the PTT a toggle as in previous releases. Added a preferences save feature so callsigns and previous gateways/modules are remembered. v 1.02: On Windows platforms, the tool now searches for appropriate COM ports and uses them for the device drop down box. This keeps users from having to figure out to which COM port Windows installed the dongle. v 1.01: Try to compensate for sounds cards that vary wildly in their frequencies. This variance causes the dongle to get out of sync with the sound card. v 1.00: Initial release