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Joined: June 6th, 2021, 9:55 am

Post by aprilzhong99 » June 16th, 2021, 10:22 am


Software: Audacity
Operating System: Windows
Mic Type: USB

Posts: 3399
Joined: August 28th, 2006, 8:47 pm
Location: Poictesme

Post by sjmarky » June 16th, 2021, 11:16 am

Hi April

I reviewed your test sample and some changes are needed. LibriVox requires audio that is 128kbps constant bit rate, 44.1kHz sample rate, mono, and between 86db and 92db, preferably 89-90. Your audio is 132kbps variable bit rate and in stereo. There is also too much background noise (sounds mechanical, like fan noise). You volume level is good.

First, try to eliminate the source of the noise. If that isn't entirely successful, use Audacity’s Noise Removal filter to reduce the background noise about 10db. A video tutorial on Audacity noise removal is available here: https://youtu.be/rvhqw7zBmEo

When exporting your MP3 from Audacity, be sure to first check Bit Rate Mode - Constant, then select 128kb from the pull-down menu, and check Force Export to Mono.

You can check your audio yourself by downloading the free Checker app: https://cgjennings.ca/projects/checker/

Please record a new test with the same file name and post it as a reply. I’ll return and review it for you.
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