Natasha’s test

All languages: post your test recording here. Help check audio files.
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NatashaW
Posts: 8
Joined: January 23rd, 2023, 3:43 pm

Post by NatashaW »

sjmarky
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Joined: August 28th, 2006, 8:47 pm
Location: Poictesme
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Post by sjmarky »

Greetings Natasha

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, 44.1kHz sample rate, mono, and between 86db and 92db, preferably 89-90. Your audio is 131kbps variable bit rate, and volume too high at 96.1db.

Make sure the the 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>Loudness Normalization, choose Perceived Volume and enter -19db LUFS..

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/

Please make a new test recording with the same file name and post it in a reply to this message. I will come back and review it for you.
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NatashaW
Posts: 8
Joined: January 23rd, 2023, 3:43 pm

Post by NatashaW »

sjmarky wrote: January 24th, 2023, 5:30 pm Greetings Natasha

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, 44.1kHz sample rate, mono, and between 86db and 92db, preferably 89-90. Your audio is 131kbps variable bit rate, and volume too high at 96.1db.

Make sure the the 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>Loudness Normalization, choose Perceived Volume and enter -19db LUFS..

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/

Please make a new test recording with the same file name and post it in a reply to this message. I will come back and review it for you.

Ok thank you soooo much!!! This makes a lot of sense
NatashaW
Posts: 8
Joined: January 23rd, 2023, 3:43 pm

Post by NatashaW »

I’m sorry, I but I am not able to figure out the technical details like I thought I would be able to, so I won’t be able to record. Thanks for your help though!!! Natasha
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