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City technicians test chamber audio, set routing and muting rules for combined/divided room configurations
Summary
Audio technicians spent several hours testing microphones, DSP routing and Zoom/YouTube feeds for Coral Gables' combined/divided meeting rooms, agreeing on channel assignments and a plan to expose mute controls so combined-mode audio does not double or feed back across rooms.
City audio technicians spent multiple hours testing and configuring the Coral Gables commission chambers' sound system, deciding how 16 microphones, two handhelds and presentation audio will be routed when the larger meeting space is used in combined and divided modes.
The work focused on preventing doubled audio and feedback when the partition between rooms is opened or closed, routing presentation feeds to the proper USB outputs for livestreaming, and assigning handheld and gooseneck microphones to fixed channel positions so staff can reliably mute or unmute channels from the touch panel.
Technicians confirmed a configuration in which, in combined mode, all 16 gooseneck microphones and the handhelds will be available to both sides and sent to the secondary USB output used for livestreaming. In divided (uncombined) mode, each physical room will have a predictable subset of microphones (typically eight goosenecks in one room and six goosenecks plus handheld(s) in the other). The team agreed to keep the alternative DSP inputs muted by default so audio does not appear twice in the feed.
Staff tested individual channels and compared levels across channel groups (noting differences on channels identified in testing as 9, 10 and 14). Technicians described a short-term fix of leaving certain channels muted on the community-side DSP and said they would expose two mute controls/snapshots that can be triggered across DSPs so combined/uncombined recall will mute the correct inputs automatically.
They also tested routing of presentation audio and USB device assignment, confirming that the system can send microphone and presentation audio to the second USB (USB 2) when rooms are combined so remote participants and YouTube receive both room audio and the presentation feed. Staff ran Zoom and YouTube checks and confirmed audio flowed out to YouTube and into the chamber via Zoom when the correct USB routing and mixer settings were applied.
Specific operational steps discussed included moving handheld microphone channel assignments so each room can retain one wireless handheld when rooms are divided, and remapping inputs so handhelds and goosenecks sit on stable channel numbers (examples discussed included mapping to channels 7–8 and moving channels previously on 3–4). The technicians also identified that the partition sensor/recall sometimes did not trigger correctly and noted they will retest that automation and save combined/uncombined snapshots as presets on the DSP.
Technicians flagged two ongoing items for follow-up: (1) finalize a cross-DSP snapshot or networked mute to ensure the touch panel and DSPs always reflect combined/uncombined state; and (2) run an additional test of the acquisition PC audio and projector routing with a Zoom participant so staff can confirm the presentation audio appears correctly in both the room speakers and the livestream. Staff said they would coordinate another live test and remote assistance if needed.
No formal votes or policy actions were taken; the work recorded in the meeting was operational testing and staff direction to finalize the muting/routing snapshots and perform additional tests before a final handoff to city operations.
