1 minute test [OK]

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blubird
Posts: 5
Joined: December 18th, 2018, 10:10 am

Post by blubird » August 5th, 2019, 3:09 pm

Hello everyone! I'm blubird and just starting out with LibriVox, I'm really excited to work with everyone here!
Attached are 2 versions of my 1 minute test, one is completely raw, and the other is edited. In the edited one I amplified the sound and used noise reduction.
I use Audacity, Windows, and a condenser microphone (an analog mic I guess?).

Raw test:
https://librivox.org/uploads/tests/test_blubird.mp3

Edited test:
https://librivox.org/uploads/tests/test_blubird_edited.mp3

Thank you all in advance for your feedback!!

TriciaG
LibriVox Admin Team
Posts: 42733
Joined: June 15th, 2008, 10:30 pm
Location: Toronto, ON (but Minnesotan to age 32)

Post by TriciaG » August 6th, 2019, 12:50 pm

Welcome!

Yeah, your unedited file was way too quiet. Kudos on getting it louder, but it's still not loud enough.

It's better to increase the mic input level first, then only do a little amplifying if needed. Make sure the microphone slider in the Audacity window is all the way up.

That said, I'll comment on the other file. :)

The edited test is still a bit too low. Numerically, it needs to come up 5 more dB. Visually, you should aim for your wave forms to peak near the 0.5 mark, like this:
Image

You can't amplify that much because of a couple louder spikes, on "HAD it been an ACtual" at about 0:20. :) You could go in and de-amplify those couple spikes, or use some light compression. http://www.youtube.com/watch?v=wJ3lOTDsN6c

It will squish your spikes so that you can amplify a bit more. :)
My default settings are as follows:
Threshold: -17 dB
Noise Floor: -40 dB
Ratio: 3:1
Attack: 0.2
Decay: 1.0
NO checks in the check boxes

That should make it so that you can amplify enough.

There's a plugin for Audacity that will tell you how much to amplify your recordings, or how far off you are from "ideal" volume. It's called ReplayGain. Instructions for installing and using it are on this page: https://wiki.librivox.org/index.php?title=Measuring_Volume_within_Audacity

Holler if you have questions! Please make these adjustments, and then post another test in this thread for another go-round. :)

P.S. Analog is a round plug; USB/digital is a flat USB plug. ;)
Experiences in the Panama Canal Zone during construction: Zone Policeman 88
Australia & New Zealand history: LINK

blubird
Posts: 5
Joined: December 18th, 2018, 10:10 am

Post by blubird » August 8th, 2019, 8:41 pm

Thank you so much for your advice!! I used the ReplayGain, compressor and amplifying effects. Attached is the most updated version of my 1 minute test, I'm not sure if the volume went up by a lot, but maybe it was just my computer's speakers or something. Let me know what you think, and take your time, no rush!

https://librivox.org/uploads/tests/test_blubird_edited_3.wav

Thank you again for all the help!

P.S. Oh I see! Ah I feel like I should have known that :lol: thank you! I'm using an analog mic but it's attached to my computer through a USB cable.

TriciaG
LibriVox Admin Team
Posts: 42733
Joined: June 15th, 2008, 10:30 pm
Location: Toronto, ON (but Minnesotan to age 32)

Post by TriciaG » August 9th, 2019, 6:29 am

It is on the louder side - about 4-5 dB too loud. Did you use ReplayGain right before amplifying, and put the number it told you in the Amplify box? It looks to me like you amplified by the number that was automatically in the box - which is the maximum amount, not the amount to get ideal volume. :)

This file is a WAV file, not an MP3, by the way. :)

One more thing, now that your volume is higher so I can hear it: I would suggest some noise reduction to take care of the background white noise. Here are a couple resources:
text instructions: http://wiki.librivox.org/index.php/Noisecleaning_With_Pics
video, but with an older version of Audacity so the settings are different: http://www.youtube.com/watch?v=VFSg9o37HMw

My settings are as follows:
Noise reduction: 10-16 (I suggest about 12 for you)
Sensitivity: 6
Frequency Smoothing: 6

One more test, with the volume and noise reduction? You're almost there!
Experiences in the Panama Canal Zone during construction: Zone Policeman 88
Australia & New Zealand history: LINK

blubird
Posts: 5
Joined: December 18th, 2018, 10:10 am

Post by blubird » August 11th, 2019, 4:33 pm

Oh oops! When I used ReplayGain it gave me a negative number, -4.8 dB, but from my headphones/computer speakers it didn't sound very loud so I kept it in the amplified state. I applied the negative number this time though and it has kept the volume around the 0.5 mark, hopefully it helps! I've also changed it to an MP3 file this time, sorry about that!

Thank you for the noise reduction info and settings! I've applied those as well to my test, below is the link to the most recent version. Thank you so much for being patient and for all your feedback, please don't hesitate to let me know if you have more suggestions! :D

https://librivox.org/uploads/tests/test_blubird_edited_4.mp3

TriciaG
LibriVox Admin Team
Posts: 42733
Joined: June 15th, 2008, 10:30 pm
Location: Toronto, ON (but Minnesotan to age 32)

Post by TriciaG » August 11th, 2019, 5:04 pm

All is good now! I don't know what other suggestions to give. :)

You're free to fly. Have fun! 8-)
Experiences in the Panama Canal Zone during construction: Zone Policeman 88
Australia & New Zealand history: LINK

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