NTi Audio XL2 Sound Level Meter - Manual (Page 133)

133
Audio Analyzer
PreNotch Listening
The input signal is audible at the rear speaker or
headphone output.
Press and hold down the speaker button • .

The pop-up window volume is dis-
played.
PostNotch Listening
The main frequency component is filtered out
by a notch filter, leaving only the remaining sig-
nal audible.
Press the speaker button • to display the vol-
ume window.
Additionally press enter
•

The post notch listening with auto-gain
function is activated. The maximum gain
setting is 0 dB.
e.g. using a 100 Hz sine test signal connected
to the XL2 input, with the 100 Hz main fre-
quency filtered by the notch filter, the complete
frequency spectrum is available at the speaker
or headphone output. This feature allows you to
listen to the actual distortion signal. You there-
fore hear a noise from the speaker even without
any connected inputs signal!