A drop-in USB-C Audio Class 2 replacement card for legacy Mackie Onyx 1220, 1620, and 1640 FireWire expansion slots.
open-hardware onyx pointless absurd audio-mixer usb-c mackie usbc audio-mixer-hardware hardware-upgrade vintage-audio firewire-retrofit firewire-option-card onyx-1220 onyx-1620 onyx-1640
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Updated
Sep 17, 2026