Audio Troubleshooting¶
This SOP defines the standardized approach for diagnosing and resolving audio system issues during prep, setup, rehearsal, and live operation. Effective troubleshooting requires calm, methodical thinking, clear communication, and adherence to signal flow fundamentals.
Random adjustments create more problems than they solve.
Purpose¶
Resolve audio issues quickly and safely.
Minimize show disruption.
Prevent repeated or cascading failures.
Standardize troubleshooting methodology across operators.
Support clear post-show reporting and improvement.
Who This SOP Is For¶
Audio leads / A1s
Monitor engineers
Audio technicians
Warehouse staff assisting with prep diagnostics
Project Managers supporting live troubleshooting
Authorized freelancers
Anyone responding to audio issues must follow this SOP.
Scope¶
This SOP applies to all audio system components, including:
Microphones (wired and wireless)
Consoles and routing
Stage boxes and snakes
RF systems
Playback devices
DSP, amplifiers, and speakers
Audio cabling and power interfaces
Troubleshooting Principles¶
Always follow these rules:
Stay calm.
Change one thing at a time.
Follow the signal path logically.
Verify before adjusting.
Communicate clearly with the team.
Panic creates mistakes.
Initial Assessment¶
When an issue is reported:
Identify: - What is affected? - When did it start? - Is it constant or intermittent?
Determine scope: - Single channel - Group of channels - Entire system
Scope defines strategy.
Follow the Signal Flow¶
Start at the source and move downstream:
Source (mic, playback device)
Cable
Stage box / snake
Console input
Channel processing
Bus / matrix
DSP / amplifier
Speaker
Verify each stage before moving on.
Common Issues & Checks¶
No Signal¶
Is the source producing signal?
Is the cable functional?
Is the channel muted?
Is the correct input patched?
Is phantom power required?
Feedback¶
Identify the source.
Lower gain before EQ.
Verify mic placement.
Check monitor sends.
Adjust system EQ cautiously.
Distortion¶
Check input gain and headroom.
Look for clipping in the signal path.
Verify output levels.
Check speaker limits.
Noise / Hum¶
Check grounding.
Verify balanced connections.
Isolate offending devices.
Check power sources.
RF Dropouts¶
Check battery levels.
Verify antenna placement.
Monitor RF meters.
Confirm frequency coordination.
Wireless Troubleshooting¶
Swap batteries first.
Check transmitter mute state.
Verify receiver frequency.
Inspect antennas and cables.
Swap components methodically.
Wireless issues often have simple causes.
Playback Issues¶
Confirm device output routing.
Verify file playback.
Check interface connections.
Switch to backup system if needed.
Never troubleshoot playback aggressively mid-show.
Escalation & Communication¶
Inform the Audio Lead immediately.
Communicate clearly and concisely.
Escalate to PM if: - Safety is affected - Show flow is impacted
Avoid side conversations during critical moments.
Clear communication speeds resolution.
Post-Issue Documentation¶
After resolving the issue:
Document: - What happened - Root cause - Resolution
Note any equipment needing service.
Share findings with warehouse and leadership.
Documentation prevents repeat issues.
When to Stop & Reset¶
If multiple systems are affected: - Stop and reassess - Reset to last known-good state
Do not chase symptoms endlessly.
Sometimes the fastest fix is a reset.
Roles & Responsibilities¶
Audio Leads / A1¶
Direct troubleshooting efforts.
Make final technical decisions.
Communicate with PM and production.
Audio Technicians¶
Execute troubleshooting steps.
Report findings accurately.
Avoid unauthorized changes.
Warehouse Staff¶
Support prep diagnostics.
Service or flag problematic gear.
Project Managers¶
Support troubleshooting decisions.
Manage client expectations if needed.
Quality Control¶
Issues addressed methodically.
Root causes identified.
Equipment issues logged.
SOPs updated if patterns emerge.
Good troubleshooting improves future shows.