| Problem | Likely Solution | | :--- | :--- | | "Error opening sound device" | Go to Windows Sound Settings > Recording tab. Disable "Allow applications to take exclusive control." Restart MixW. | | No waterfall display | Click > Show Waterfall . Ensure the sound card input level is not muted (use Windows Volume Mixer). | | CAT control flaky | Reduce the baud rate in both MixW and your radio to 4800 or 9600 (not 19200). Disable RTS/DTR flow control. | | Crashes on Windows 11 | Run the Program Compatibility Troubleshooter (built into Windows 11). Force it to run in Windows 8 mode, not XP. | | PTT not keying radio | MixW 3.1.1 uses DTR or RTS pins on the COM port for PTT. Check your interface cable. Use the "Test PTT" button in Config > PTT. |
Since the original developers no longer distribute version 3.1.1, your safest bet is the or reputable ham radio repository sites like HamFiles or DXZone user uploads that have been scanned.
grab MixW 3.1.1 from a torrent or a generic DLL website.
While version 3.1.1 is an older release, you can typically find it or its direct successors through the following channels: