The port selection switching back to the wrong setting (port 1 if you’re trying to use 2 ports or ports 1-2 if you’re trying to use 1 port) is caused by a preference file getting corrupted. This can happen from using System Preferences Sound to make your audio selections. We recommend only using Audio MIDI Setup (Applications > Utilities > Audio MIDI Setup) from now on.
To fix this issue, please follow these steps in the exact order:
- Go to the following location: MacHD Library Preferences Audio
- Once you’re in the ‘Audio’ folder, there should be 2 files in there: com.apple.audio.DeviceSettings.plist
- Trash both of these files and empty the trash.
- If you still have the Symphony Release Installer package on your desktop or downloads folder, open it. If not, download it from our website and open it.
- Launch the Symphony Uninstaller and run it. Restart your Mac after the uninstall has completed.
- Open the Symphony Release Installer package and run the Symphony Software Installer. Restart your Mac after the install has completed.
- It’s a good idea to connect your Symphony I/O(s) to your Mac via USB and launch the ‘Symphony I/O Firmware Updater’ (Applications Utilities Symphony I/O Firmware Updater) just to double-check that your firmware is all on the current versions. If it’s not, update it. If it is, move to the next step. (Only update firmware on 10.6.8-10.10 per THIS GUIDE.)
- Launch Audio MIDI Setup (Applications Utilities Audio MIDI Setup). We recommend using Audio MIDI Setup instead of System Preferences Sound.
- Make sure that ‘Symphony64′ (PCIe or Thunderbridge) is selected in the left-side column. In the ‘Source’ menu on the right, choose the appropriate port selection depending on how many Symphony I/Os you have. If you have 1 unit, choose ‘Port 1: 32ch’… if you have 2 units, choose ‘Ports 1-2: 64Chs’.
- Quit Audio MIDI Setup and restart the computer. Wait until the unit/units sync and stop clicking before launching Maestro. This can take a couple minutes if you’re using 2 Symphony I/Os.