Troubleshoot Signal Silence, Distortion, Feedback, Dropouts, and Latency

Trace common audio-quality failures from the Signal source to the local output.

Written By 4ALL.LIVE

Last updated 1 day ago

Trace an audio-quality failure in order from the Signal source to the local output, changing one stage at a time and keeping the approved fallback available.

Best for: technicians diagnosing silence, wrong language, distortion, feedback, dropouts, or excessive delay during rehearsal or production.

Follow the stage-by-stage decision tree

  1. Source status and meter: confirm the source exists, is permitted, is running, and shows the expected audio. For TTS, confirm the event, language, node state, publisher, and underruns.
  2. Graph edge: follow the connection from the source to the next node. Check compatible ports, channel count, channel mapping, and rejected cycles.
  3. Processing and clipping: compare meters before and after gain, dynamics, delay, suppression, EQ, or reverb. Check peak, clip hold, and bypass behavior.
  4. Output device and channel: confirm the selected device is available and the graph channel maps to the intended output channel.
  5. Physical interface: listen and meter at the interface, then inspect its level, sample rate, clock, power, and hardware controls.
  6. Downstream equipment: only after the interface is correct, inspect cabling, transmitter input and channel, RF path, receiver, battery, and headset.

Symptom checks

Silence or wrong language

Start at the source. A TTS node can be waiting for translated audio or the event publisher even when the graph is correctly connected. If audio is present, confirm the selected advertised language and any language fallback before tracing the dedicated output.

Distortion

Find the first meter or listening point where distortion appears. Reduce the stage that clips, preserve headroom, and check sample-rate or clock disagreement at the interface.

Feedback

Stop the affected route and remove the path that returns an output to its own source. Signal rejects graph cycles, but acoustic or external hardware loops can still create feedback.

Dropouts and latency

Relate audible gaps to TTS jitter and aggregate underruns, device or network state, and workstation load. Inspect excessive buffering and intentional delay separately. Source DSP timing is not end-to-end latency.

Important: never bypass listening-system safety, venue approval, or an approved fallback to make a faster on-air change.

Verify the repair

  • The expected source and language are stable.
  • Every intermediate and output meter is continuous and below clipping.
  • The correct interface channel sounds clean.
  • The full downstream chain works at representative range and load.
  • A controlled stop, restart, and relaunch test passes off air.

Operational boundary

Signal stops at the workstation or physical interface output. Do not infer transmitter compatibility, RF coverage, receiver condition, or legal assistive-listening compliance from a successful local output test.