Gain Structure Calibration
Optimize the complete measurement signal chain from generator output to microphone input
What Gain Structure Calibration Does
Balances your generator output, amplifier gain, and microphone preamp levels to achieve optimal signal-to-noise ratio across the complete measurement chain: AudioMap → Interface → Amplifier → Speakers → Mic → Preamp → Interface → AudioMap
Calibration Procedure
Set generator output to moderate level
In AudioMap, set signal generator to -12 to -6 dBFS (start conservative)
Adjust amplifier gain for comfortable listening level
Set power amplifier or interface output to produce 75-85 dB SPL at listening position
Check for clipping indicators, ensure clean reproduction
Position measurement microphone
Place mic at listening position, 1-2 meters from speakers at ear height
Start test signal in setup wizard
Click "Play Test Signal" - pink noise plays through all sources
Adjust preamp gain to green zone (60-80%)
Turn microphone preamp gain while monitoring level meter:
Hold stable for 3 seconds
Keep meter in green zone - calibration completes automatically
Troubleshooting
- • Levels too low? Increase generator output or amplifier gain
- • Levels clipping? Decrease generator output or amplifier gain
- • Set amplifier first, then optimize preamp gain