“In macOS, when starting SPL measurement, the speaker cannot produce any signal sound.

Spring Zhang · Tuesday at 3:49 PM

Please help take a look at my issue.

“In macOS, when starting SPL measurement, the speaker cannot produce any signal sound.”

My REW,version is V5.31.3

John Mulcahy · Tuesday at 3:57 PM

The SPL meter shows sound levels captured by the selected audio input. It doesn't generate anything. You can use the signal generator to produce output signals.

Spring Zhang · 2025-09-17T07:18:05-0500

“It’s not the reason you suggested — I’m familiar with the basic settings. This is a hardware compatibility issue. It works fine with other audio interfaces, but when I use the Apogee Duet 3, the problem occurs! Does anyone know the correct setup method for this interface, or if there are optimization issues specific to it?”

thank you！

John Mulcahy · 2025-09-17T07:29:26-0500

In the Mac's Audio Midi Setup utility make sure the input and output for the Duet 3 are set to the same sample rate and match the rate in REW.

“In macOS, when starting SPL measurement, the speaker cannot produce any signal sound.

Spring Zhang

Registered

John Mulcahy

REW Author

Spring Zhang

Registered

John Mulcahy

REW Author

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