One Minute Test [OK]

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sjmilli7
Posts: 10
Joined: May 19th, 2020, 12:48 pm

Post by sjmilli7 » May 21st, 2020, 1:34 pm

Hi everybody,

I attached my one minute test below. I'm using Audacity with a Mac and a USB microphone. Let me know how it sounds, and thanks for all your help.

https://librivox.org/uploads/tests/test_sjmilli7.mp3

Spencer

knotyouraveragejo
LibriVox Admin Team
Posts: 16489
Joined: November 18th, 2006, 4:37 pm

Post by knotyouraveragejo » May 22nd, 2020, 1:38 pm

Hi Spencer. Welcome to LibriVox.


Hi! Welcome to LibriVox.

This file was saved in the wrong format. It was saved as a variable bitrate file. You need to export as a 128 kbps constant bitrate mp3 file. In Audacity, you do this when you export the file. Under File - Export - Export as mp3. In the window that pops up, choose the following Format Options: Bit Rate Mode - Constant; Quality 128 kbps.

Also, the volume on this recording is too low. (83.4 db). We aim for 89 db with an acceptable range of 86-92 db. Please try increasing the mic input volume either in Audacity or in the Sounds and Audio controls on your Mac. This adjustment will also help increase the signal to noise with regard to the background.

To judge whether you have the volume set correctly, your waveform in Audacity should look similar to this example:

Image

Detailed instructions for adjusting your input levels can be found here:

http://wiki.librivox.org/index.php/Setting_Recording_Input_Level


You can download the checker program to check your volume after exporting to mp3 and before you upload your file.

https://wiki.librivox.org/index.php/Checker

If you prefer you can use the Replay Gain plugin in directly in Audacity to tell you how much your file needs to be amplified to get to 89 db. Instructions here:

https://wiki.librivox.org/index.php/Measuring_Volume_within_Audacity

If you can't adjust your input volume to reach the target 89 db, then, you will need to use the Effect:Amplify to actually amplify the file. Important: be sure the box to allow clipping is not checked!

Please try increasing the volume and/or make the above modifications and upload another test. Just post the link to this same thread to keep all your tests together.
Jo
My Librivox Solos
Books are the carriers of civilization. Without books, history is silent, literature dumb, science crippled, thought and speculation at a standstill. - Barbara Tuchman

sjmilli7
Posts: 10
Joined: May 19th, 2020, 12:48 pm

Post by sjmilli7 » May 22nd, 2020, 6:50 pm

Thanks Jo,

The volume on this new uploaded file is in range. And, I think I exported the right kind of file this time. Let me know how it sounds.

https://librivox.org/uploads/tests/test_sjmilli7.mp3

Thanks,

Spencer

knotyouraveragejo
LibriVox Admin Team
Posts: 16489
Joined: November 18th, 2006, 4:37 pm

Post by knotyouraveragejo » May 22nd, 2020, 9:41 pm

Sounds good, Spencer. Volume and file format are now correct. You are good to go find something interesting to record. Have fun!
Jo
My Librivox Solos
Books are the carriers of civilization. Without books, history is silent, literature dumb, science crippled, thought and speculation at a standstill. - Barbara Tuchman

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