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[Symphony I/O Mk 1](https://knowledge.apogeedigital.com/legacy-products?hsLang=en#symphony-i-o-mk-1) # Symphony I/O Release 5.5 System Requirements ## This final release for Symphony I/O also supports the Symphony64 PCIe card and Symphony64|Thunderbridge.  Legacy devices using the X-Symphony option card have not been tested but appear to work with this release. ### Symphony I/O Release 5.5 Requirements   [Click here to download Symphony I/O Release 5.5](https://knowledge.apogeedigital.com/hubfs/Software%20Installers/Symphony%20IO/SymphonyIO_Release_5.5.dmg?hsLang=en) #### What's New in this Release: - Support for the following - - Symphony I/O (original Mk1) - Symphony64 PCIe card - Symphony64|Thunderbridge - Legacy interface support with Symphony64 PCIe or Thunderbridge: AD-16x, DA-16x, Rosetta 800, Rosetta 200 - System Requirements: macOS 11 or later - Apple Silicon and Intel Processors *\*This installer is not compatible with macOS 10.15 or lower. User previous Release installers for older macOS versions.* #### **Symphony Audio Interface Mode** Requirements to connect Symphony I/O to Apogee Symphony 64 Thunderbridge or PCIe cards*:* - Apple Mac computer with built in Thunderbolt connector - macOS 11.0 or higher - 4 GB minimum RAM, 8 GB or higher recommended #### **PTHD (Pro Tools HD) Audio Interface Mode** A Symphony I/O based Pro Tools system consists of two independent computer connections: - audio (to a Pro Tools HD PCI card) - and software control (via USB to an Intel Mac running Maestro 2). In the case where PCI cards are installed in a PowerPC Mac or Windows computer, it’s possible to run Maestro from a separate Intel Mac, such as Mac Mini or MacBook. NOTE: Running Symphony I/O in Pro Tools HD mode on a PowerPC Mac requires an older firmware version. Only the 8x8, 16 Analog In/Digital Out, and 16 Digital In/Analog Out modules are compatible with versions of Pro Tools HD older than version 9. The 16x16 Analog In/Out and 2x6 modules are only compatible with Pro Tools HD versions 9 and above. **Requirements to connect Symphony I/O to Avid Pro Tools PCI Cards:** - Avid Pro Tools HDX, HD Native or HD Core/Accel/Process card installed in a computer in accordance with the Pro Tools HD Compatibility Grids, available at [www.avid.com](http://www.avid.com/) - Pro Tools 8.1 (requires older Symphony I/O firmware), 9.0 or greater, 10.0 or greater, 11.0 or greater **Requirements to run Apogee Maestro software included with Release v5.5, to control Symphony I/O via USB:** - macOS 11.0 or higher - 4 GB minimum RAM, 8 GB or higher recommended #### **USB Audio Audio Interface Mode** Requirements to connect Symphony I/O as a USB audio interface: - macOS 11.0 or higher - 4 GB minimum RAM, 8 GB or higher recommended #### **Standalone Audio Interface Mode** In Standalone audio interface mode, all audio connections are made using the standard analog and digital i/o found on the I/O Module(s). For software control, connect Symphony I/O's USB port to a Mac. **Requirements to run Apogee Maestro software included with Release v5.5, to control Symphony I/O via USB:** - macOS 11.0 or higher - 4 GB minimum RAM, 8 GB or higher recommended --- #### Note on Firmware - Nothing has been changed since the previous Symphony Release, other than support for macOS 11.0 and M-series Apple Silicon systems. - If your Symphony I/O is already on the latest firmware, there is no firmware update required. The latest firmware is XMOS 1.6.48 - - If your Symphony I/O is using older firmware, you will need to download the Symphony I/O Firmware Updater from the previous Release 5.4c Installer package and use an Mac running macOS 10.10.5 or earlier (10.6.8 - 10.9 recommended) to update the firmware, as the firmware updater app is not compatible with any version of macOS newer than 10.10.5. #### Known Issues 1. I/O level controls for Symphony I/O do not work from Audio MIDI Setup, System Preferences Sound, or the Keyboard Volume Control. 2. Clock Source menu no longer available in Audio MIDI Setup. 3. 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