HubTee¶

A USB / MIDI / Ethernet hub with clock. Central routing and connectivity hub for the OpenAudioTools ecosystem.

Overview¶

The HubTee serves as the central nervous system of an OpenAudioTools studio setup:

MIDI routing — Bridges USB MIDI devices, DIN/TRS MIDI, and Network MIDI 2.0 (UMP over UDP). 4× USB-A host ports for MIDI controllers.
Ethernet hub — 8× Ethernet connectors allow star or daisy-chain topology for connecting multiple devices (SynTees, MixTees, computers).
Clock distribution — Can act as PTP grandmaster (IEEE 1588v2) for synchronizing audio clocks across all networked devices.
Audio bridging — Subscribes to audio streams from synths/mixers and can publish its own _jfa-audio._udp streams.

Network role: hub
Publishes _jfa-midi2._udp endpoints for bridging Network MIDI 2.0 to DIN/USB MIDI.
Publishes _jfa-audio._udp TX if it exposes its own audio stream(s).
Can run the Patchbay "brain" — periodically browses _jfa-audio._udp and _jfa-midi2._udp, builds an in-RAM device/port graph, and exposes a web UI or OSC/JSON API for managing routes.
Hostname: hub-XXXX.local (or similar pattern)

Teensy 4.1 — ARM Cortex-M7 @ 600 MHz with native 100 Mbps Ethernet (DP83825I PHY).
Same UDP/IP network stack as other audio-capable devices (QNEthernet).

Multiple devices (SynTees, computers, MixTees) connected through the HubTee via Ethernet and MIDI, creating a centralized studio network.

See Networking for protocol details and Ecosystem Notes for the full technology stack.