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U37 USB Studio Recording 
Microphone

The U37 is a side-address microphone. When recording, speak or 
play into the side of the mic that has the CAD logo.

The U37 has two switches on the front. The fi rst switch allows you 
to decrease the sensitivity of the microphone so the sound quality 
is clear for extremely loud sounds.  For example, the switch should 
be in the “-10” position for loud voices, percussion and other high 
sound pressure level devices. The “0” position should be used for 
normal voices and string instruments. If the recording is unclear or 
distorted set the switch to “-10” and re-record.

The second switch on the U37 is designed to reduce pickup of 
deep-bass sounds. The switch should be in the “Normal Bass” 
mode in most cases. However, if you want to remove wind noise, 
ventilation noise, or decrease the low frequencies in a recording, 
the switch should be in the “Bass Reduction” position.

Normal 

Bass

Bass 

Reduction

Bass settings

Before using the U37 in your favorite audio or communications 
application you must confi rm that the computer’s operating 
system recognizes the U37.

Windows XP recognition instructions

1.  Plug the U37 into the USB port on the computer.

 

(When using a USB hub, check with the hub manufacturer to 

 

be sure the hub supports a device such as a microphone.  Plug

 

the U37 directly into the computer’s powered USB port for 

 optimal 

performance.)

2.  Allow 30 to 60 seconds for the system software to recognize 
 

the U37. (A series of bubbles will appear by the Windows 

 

toolbar to notify you of a new device.)

3.  In the Start Menu, select Control Panel.

 
4.  Select “Sounds, Speech, and Audio Devices”.

 

5.  Select “Sounds and Audio Devices”.

6.  Select the “Audio” tab. Confi rm that under the “Sound 
 

recording” section the “C-Media USB Audio Device” is 

 

selected. (The “Sound playback” should remain your usual

 

sound output device).

 
 
7.  Select the “Volume” tab under the Sound recording heading 
 

and select “Advanced Controls” in the Options menu of this 

 window.

 

8.  Click the “Advanced” button to open the “Advanced Controls 
 

for Wave In” window. Depending upon your system, you 

 

might have the option of selecting “1 AGC” or “Mic boost”. 

 

Checking this option will signifi cantly increase the sensitivity 

 

of the microphone. Use this for recording softer sounds. If you 

 

experience distortion when recording louder sounds, try 

 

unchecking this option.

 
 
9.  Launch your audio recording software.

10.  Position the U37 approximately 4 to 6 inches from the sound 
 

source for best results.

11.  Locate the preferences in your audio program and select 
 

the “C-Media USB Audio Device”. Adjust the input level in this 

 

program so that the audio signal is not distorted.

12. Enjoy your CAD U37 USB Studio Recording Microphone.

(Default playback device)

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