1-minute test- ltycan1

All languages: post your test recording here. Help check audio files.
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ltycan1
Posts: 2
Joined: March 7th, 2024, 10:51 am

Post by ltycan1 »

https://librivox.org/uploads/icequeen/test_ltycan1.mp3

Audacity program used
Windows
USB mic
sjmarky
Posts: 4668
Joined: August 28th, 2006, 8:47 pm
Location: Sacto CA
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Post by sjmarky »

Hiya Tyler

I reviewed your test sample, and while it sounds good there are some technical changes needed. LibriVox requires audio that is 128kbps constant bit rate MP3, 44.1kHz sample rate, mono, and between 86db and 92db, preferably 89-90. Your test audio is 96kbps variable bit rate, stereo, and volume above range at 93.5dB. There is also a bit too much background noise by 10 - 15 dB.

Make sure input gain slider in Audacity (upper right with the little mic icon) is well to the right. Then adjust the input gain on your mic so your raw recording has wave forms that peak at about the 0.5 marks in the Audacity window:
Image

If necessary, adjust the volume level before exporting by going to Effects>Amplify.

Try to isolate your mic from the noise, such as computer fan. If that isn’t entirely successful, use Audacity’s Noise Removal filter to reduce the background noise about 10db. Noise removal instructions are available here: https://wiki.librivox.org/index.php?title=Noise_Cleaning. A video tutorial on Audacity noise removal is available here: https://youtu.be/rvhqw7zBmEo

When exporting your MP3 from Audacity, go to File>Export Audio. In the pop-up menu select:
Format: MP3 Files
Channels: Mono.
Sample Rate: 44100
Bit Rate Mode: Constant.
Quality: 128kbps.

These selections will be saved for future exports.

See the pinned post at the top of this forum for screen shots of these menus and settings.

You can pre-check your audio yourself by downloading the free Checker app: https://cgjennings.ca/projects/checker/
Passed with Warnings is a fail with regard to volume.
With Checker open, go to Validation>Choose Validation Methods and check Background Noise. Be sure to leave 5 seconds blank at the end of your recording.

Please make a new test recording and post it in a reply to this message. Upload it to the folder 'Tests", not icequeen. I will come back and review it for you.
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