Markjeremys - One minute test [OK]

Markjeremys · Post by **Markjeremys** » December 30th, 2023, 12:46 pm

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

Windows 10, Audacity, USB Tascam DR07 digital recorder

Feedback much appreciated

sjmarky · Post by **sjmarky** » December 30th, 2023, 8:43 pm

Howdy Mark

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 101kbps variable bit rate, plus has too much background noise.

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

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.
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. I will come back and review it for you.

Markjeremys · Post by **Markjeremys** » January 15th, 2024, 1:22 pm

Hi sjmarky

I've made a new test recording which did pass the checker in terms of volume level and, hopefully the other technicalities are sorted. Please let me know if it is any good.

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

Thanks,

Mark

sjmarky · Post by **sjmarky** » January 15th, 2024, 2:37 pm

Technical specs are good, but there is still too much background noise by at least 10db. If you can't isolate your mic better, try Audacity Noise Reduction with reduction setting of 10db. Should work well on this type of noise.

Markjeremys · Post by **Markjeremys** » February 7th, 2024, 12:05 pm

Thanks sjmarky,

Please could you check my latest effort at the one minute test.

https://librivox.org/uploads/tests/7thfeb_2024_ms_1min_test.mp3

Thanks,

Mark

sjmarky · Post by **sjmarky** » February 7th, 2024, 12:11 pm

Your audio meets LibriVox requirements, so you are good to go.

Happy narrating!