I minute test

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LordJaj
Posts: 1
Joined: June 29th, 2018, 9:45 pm

Post by LordJaj » June 30th, 2018, 3:31 pm

Hello, I'm Lord Jaj and this is my 1-minute test:
https://librivox.org/uploads/tests/testlordjaj.mp3
I used
Software: Audacity
Mic: Usb

Thank you for your considreation and feed back.

Have a great day.
Lord Jack A. Jordan

knotyouraveragejo
LibriVox Admin Team
Posts: 14693
Joined: November 18th, 2006, 4:37 pm
Location: Pennsylvania

Post by knotyouraveragejo » June 30th, 2018, 8:22 pm

Hi Jack. Welcome to Librivox.

There are a few technical issues with your test file.

1. The bitrate for the exported mp3 should be 128kbps constant bitrate. Your file was at a variable bitrate.

You set the bitrate at the bottom of the export window under Format Options.
Bit Rate Mode: Constant
Quality - select 128 kbps from the dropdown

2. The volume on this recording is much too low (72.4 db). The target volume is 89 db +/- 3 db. Please try increasing the mic input volume either in Audacity or in the Sounds and Audio section of the Control Panel. 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! *However simple amplification of this file will probably result in an unacceptable level of background noise since you will be amplifying by ~ 16 db to get to the target level.

Please try increasing your input volume and/or amplifying 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

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