Townsend Labs Sphere L22 Precision Microphone System Guide
52
Appendix A: Troubleshooting
Table A-1
Troubleshooting Guide
Problem
Possible Cause
Solution
No signal from
microphone.
Microphone is not receiving
48-V phantom power from
the preamp.
Use the supplied XLR breakout cable to connect the mic to the
preamp inputs; enable phantom power on both channels.
Sound is muffled
and reverberant.
Sound is coming into the
rear of the microphone.
Rotate the mic 180° so sound enters the front.
Input channels are
swapped.
Make sure the Front output is routed to the Left input of the plug-
in, and the Rear output is routed to the Right input. For more
information, see
Preamp Calibration
on page 13.
Sound is distorted.
Preamp input gain is too high. Reduce the preamp gain on both mic channels.
SPL at mic is too high.
Set the Attenuation switch on the mic to the
-10
or
-20
dB setting.
Output level of preamp is
too high, causing clipping of
the A/D converters.
Lower the preamp level until the distortion disappears.
Output level of Sphere plug-
in is too high, causing clipping
of the A/D converters.
Lower the plug-in output level until the distortion disappears.
Mic modeling from
plug-in output does
not sound normal.
Only one channel of the
microphone is connected/
powered and routed to the
plug-in.
The Input meter at the bottom of the plug-in shows audio level to
both channels: The top and bottom of the meter show the left and
right channels, respectively. If the plug-in is not receiving audio on
both channels, check that both mic channels are connected to the
preamp, and the preamp is connected to your DAW.
The gain levels of the preamp
channels are not properly
matched.
See
Preamp Calibration
on page 13 to learn how to match your
preamp levels.
Microphone is in calibration
mode.
Move the calibration switch on the mic to the
NORM
position.
The mic outputs are
swapped.
Make sure the Front output is routed to the Left input of the plug-
in, and the Rear output is routed to the Right input. For more
information, see
Preamp Calibration
on page 13.
The signal chain includes
another plug-in or outboard
processor that precedes the
Sphere plug-in.
See
DAW Signal Chain
on page 26 to learn how to route your
plug-in.