Sound Checkup

Test runs for various sound equipment.

My current pro recording microphone is a CAD U37 USB Studio Condenser Recording Microphone. This note is as much so I can remember the darn thing as for anyone else’s reference.

I have, but have not yet hooked up, an audio I/O box that I had set aside. When it’s set up, I’ll list the model.

I use Audacity 2.0.6 and an older iMac and Mac OS X Yosemite for my recording platform.

I have a Windows 7 laptop, older now, but its audio input is somehow shot, not functioning. At some future point, I will get a new laptop, either Windows or Mac.

Audacity should have its Preferences for Recording Input set to 44100 kHz, 16 bit audio or 32 bit float; and in MP3 format export output, it should be set to 192 kbps Stereo MP3 output.

CAD U37 USB Studio Condenser Recording Microphone

test_00_med_med.mp3
Noise Reduction Switch: 0 dB; Bass Reduction Switch: OFF, Computer Volume: Medium; Audacity Volume: Medium-High;
test_10_med_med.mp3
Noise Reduction Switch: –10 dB; Bass Reduction Switch: OFF; Computer Volume: Medium; Audacity Volume: Medium-High;
test_01_med_med.mp3
Noise Reduction Switch: 0 dB; Bass Reduction Switch: ON; Computer Volume: Medium; Audacity Volume: Medium-High;
test_11_med_med.mp3
Noise Reduction Switch: –10 dB; Bass Reduction Switch: ON; Computer Volume: Medium; Audacity Volume: Medium-High;
test_2_1_0_20_low.mp3
Noise Reduction Switch: –10 dB; Bass Reduction Switch: OFF; Computer Volume: 20%; Audacity Volume: Low; System Preferences → Sounds → Input: C-Media Input Device Microphone; Set Audacity’s Preferences → Recording Input: C-Media Input Device Microphone; However, it offers only 1-Mono, not 1-Stereo; Then Export/Save as Stereo; Volume levels for the computer and Audacity may need to be lower still;

Notes

  1. The FIRST set of recordings for { SoT ep1 and ep2 } were made at: { Noise Reduction Switch: –10 dB; Bass Reduction Switch: ON; Audacity Volume: Medium-High; Computer Volume: Medium; }
  2. Item 5 (test_2 file) now appears to be set correctly for input recording, but the sound volume levels may need to be further adjusted. The input source had been reset, cause unknown, so it had been reading input from the wrong (built-in) computer microphone, instead of the CAD U37. With this corrected, we should be on the right track, or closer to it. Note in Audacity, the C-Media Recording Input Microphone is only showing Mono, not Stereo, as a choice. However, the Export/Save file format does show Stereo output. Anyway, the sound quality is better, now that it is reading from the correct input device. (Sigh. I will have to keep an eye on the OS and Audacity after updates to make sure it doesn’t reset.)

Current BEST Configuration

  1. // Preferences for System Sound Input and for Audacity;
  2. Input Source: “C-Media Recording Input Microphone”;
  3. Noise Reduction Switch: –10 dB;
  4. Bass Reduction Switch: OFF;
  5. Input Volume: 15%;
  6. To keep volume levels in range and not maxing out for ordinary speech volume.