1 minute test (keturandrea)

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Joined: January 25th, 2016, 11:08 am

Post by Keturandrea » April 20th, 2020, 10:38 am

Used Audacity, Windows, gamer headphones mic and I have no clue what I'm doing but am excited to contribute. :?: :) :D

Here is my file


Please help me improve. Thanks for the feedback!

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Joined: November 18th, 2006, 4:37 pm

Post by knotyouraveragejo » April 21st, 2020, 2:42 pm

Hi. Welcome to LibriVox. Please see the comments below regarding your test recording.

1. Hi! Welcome to LibriVox.

This file is in stereo and needs to be mono. For future LibriVox recordings, you can set Audacity to record in mono under Edit - Preferences - Devices - Recording - Channels - One

2. You need to export as a 128 kbps constant rate mp3 file. If you are using 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; Channel Mode - Force export to mono.

3. There are 2 entirely different readings in this file. In the first, the volume is too low and in the second much too loud. 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 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:


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


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


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:


If you can't adjust your input volume to reach the target 89 db, then, you will need to use the Effect:Amplify to either amplify of deamplify the file depending on which version we are talking about. Important: be sure the box to allow clipping is not checked!

4. There is significant background noise in this recording. You can experiment with the Noise Removal effect in Audacity to reduce it, but first I would recommend listening to your surroundings and see if there is anything running that can be temporarily shut off while recording. If it is your computer fan, then try moving further from the computer if possible and see if that helps


Please make the about adjustments and upload another test. Just post the link to this same thread to keep all your tests together.
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