--- title: What is 'SBUS' (connecting 2 Macs together via 2 Symphony64 cards) and is it still supported? description: SBUS was a functionality that was included with the original Symphony 64 PCIe release.  --- [Skip to content](https://knowledge.apogeedigital.com/what-is-sbus-connecting-2-macs-together-via-2-symphony64-cards-and-is-it-still-supported#main-content) English Show submenu for translations [Contact us](https://knowledge.apogeedigital.com/kb-tickets/new?hsLang=en) ![Apogee Logo White.png\]](https://knowledge.apogeedigital.com/hs-fs/hubfs/Apogee%20Logo%20White.png?height=40&name=Apogee%20Logo%20White.png) Open main navigation Close main navigation - English Show submenu for translations - [Contact us](https://knowledge.apogeedigital.com/kb-tickets/new) - Go to apogeedigital.com Go to apogeedigital.com How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://knowledge.apogeedigital.com/?hsLang=en) 2. [Legacy Products](https://knowledge.apogeedigital.com/legacy-products?hsLang=en) 3. [Symphony 64 PCIe & Thunderbridge](https://knowledge.apogeedigital.com/legacy-products?hsLang=en#symphony-64-pcie-thunderbridge) # What is 'SBUS' (connecting 2 Macs together via 2 Symphony64 cards) and is it still supported? SBUS was a functionality that was included with the original Symphony 64 PCIe release.  SBUS let you connect multiple Macs together to pass audio back and forth between them using Symphony 64 PCIe cards. Unfortunately, it was no longer supported after the release of Symphony I/O (original Mk1 version). 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