New user

[Todd R]

I'm making measurements, and the low limit is set to 20hz
When I run the sweep, it only reads down to 100hz then drops like a rock. The speakers are rated to 32 Hz abd I have SVS Subs that reach to 18hz.
Why am I not seeing the complete sweep?

 

[Lid9497]

 

[Todd R]

Why would that affect the frequencies sent by REW?

 

[John Mulcahy]

One common cause of low end roll-offs in measurements is Windows doing noise cancellation processing on the input. Mics may have the same signal on both channels resulting in almost perfect cancellation at low frequencies. Turning off the noise cancellation can vary depending on the PC and its enhancement options. For ASUS check that AI noise cancelling microphone is not on in myASUS. For HP check that AI noise removal is not on in HP Audio Center, Noise cancellation tab. You may also find noise cancellation as an option you can disable on the Enhancements tab of the input audio properties.

 

[Todd R]

One common cause of low end roll-offs in measurements is Windows doing noise cancellation processing on the input. Mics may have the same signal on both channels resulting in almost perfect cancellation at low frequencies. Turning off the noise cancellation can vary depending on the PC and its enhancement options. For ASUS check that AI noise cancelling microphone is not on in myASUS. For HP check that AI noise removal is not on in HP Audio Center, Noise cancellation tab. You may also find noise cancellation as an option you can disable on the Enhancements tab of the input audio properties.

Ok, that makes sense. I'll check it.