u/ChangeHemispheres

I’m troubleshooting intermittent audio glitches in a LiveProfessor insert rig and would appreciate help narrowing down the cause.

There are two separate Dante networks.

Building distribution:

• dLive MixRack Dante card at 48 kHz
• Q-SYS Core is the Dante clock leader
• Sync to External disabled on the MixRack Dante card

LiveProfessor inserts:

• dLive Surface Dante card at 96 kHz, with Sync to External enabled
• Dante card receive latency set to 0.5 ms
• RedNet TNX connected directly to the Surface card, without a network switch
• TNX connected to a Mac mini M4 Pro over Thunderbolt
• LiveProfessor at 96 kHz with a 128-sample buffer
• 6 processing threads, Apple multithreading mode
• Approximately 35 audio channels in use
• Mac has 24 GB RAM

The dLive system’s Audio Clock Source is Internal (96 kHz).

The LiveProfessor Mac is a dedicated offline computer, isolated from the internet and all other networks. Its audio connection is through the TNX to the dedicated Dante insert link.

Plugins include Waves Tune Real-Time, FabFilter Pro-Q/Pro-DS, R-Bass, Smack Attack, and Valhalla.

The rig seems to run without glitches for roughly the first hour. After that, glitches begin intermittently, particularly during busy musical passages when all inserted channels are carrying audio. During today’s music section, I heard approximately one significant glitch per song.

LiveProfessor reported no dropouts, and Dante Controller showed no clocking issues. Activity Monitor showed approximately 86% CPU idle, green memory pressure, and zero swap.

What diagnostics would help distinguish a plugin problem from an audio-driver/Thunderbolt or Dante transport issue? Is there anything specific I should monitor as the rig passes that first hour?

I’m looking for a 2-computer 1-monitor HDMI KVM where switching speed is the main priority. I’d like the video switchover to be under 100ms, or as close to instant as possible.

Requirements:

• 2x1 HDMI
• EDID emulation/retention on both computers
• Very fast switching with minimal to no black screen
• USB keyboard/mouse switching
• Preferably RS-232 or LAN control (local network control, not KVM-over-IP)
• 4K60 would be ideal

This is going into a live production/FOH environment, so I’m trying to avoid the normal 1-5+ second black screen when switching computers. I don’t need remote desktop or KVM-over-IP. I just want to be able to send a command to the KVM to select input 1 or 2. (Bitfocus companion via http commands or gpio)

I’ve been looking at the ATEN CS1822 because of DynaSync/EDID retention and its Fast Switching Mode, but I’m not sure how fast it actually switches.

Does anyone know of a KVM that actually keeps both HDMI sources active and can switch in 100ms or less? I’m fine spending around $250 if there’s something reliable.