Tutorial: Maintain Quality on a Crappy Microphone
BackTutorial: Maintain Quality on a Crappy Microphone Requirements: Audacity (audacity.sourceforge.net) This video tutorial shows you how to reduce background noise from your sound clips, while still maintaining a reasonably good quality. 1. Go into Control Panel and double-click on Sound. Go to the "Input" tab, click on the Microphone icon, then click on Properties, now go the second tab and set the microphone boost as low as possible. Now, click OK. 2. Open up Audacity and record something. Make sure you have a long pause (5 seconds of noise at least) containing plain background noise without any interruptions. A longer pause means better noise reduction quality, as it helps the noise reducer know what noise it has to reduce. 3. Go to Effects, and click on Normalize. A dialog box should appear with two options ticked. Just click "OK". This makes your sound appear a normal volume. 4. Select everything (Ctrl+A), click on Effects, then click on noise Removal. Now, click on Get noise Profile. Now, select any part of silence (Microphone background noise), and then go into noise Removal again. Drag the tab at the bottom so that it is at its lowest. Now, click on Remove noise. Now, select everything again (Ctrl+A) and then go into noise Removal AGIAN, and click on Remove noise again. Note, though, that if you're really into making the sound 100% clean, you're better off removing noise layer by layer. Doing it all using a single noise reduction doesn't always give very good results. 5. Do part 3 again, as the sound will become less noisy, because of the filter. 6. To make the sound just perfect, select all the places where there is a pause, and then click on the icon, "Silence Selection". It's located on the upper panel with the many buttons. Also, you might want to remove too long pauses by simply Cutting ("Cut" is also on the panel) the selection instead. This can for example be useful, when you want to remove the pause at the end of your sound. 7. Finally, if you think the sound file is way too big, then just go into Control Panel -- Sound -- "Input" tab -- Properties (After you clicked the microphone icon) -- "Advanced" tab. Then in the drop-down list, click on the item with the lowest amount of Hz, or at least a lower one, if you want a smaller size. This reduces quality, but it's not extremely noticeable... Except if it's VERY low quality, and I'm not sure Windows even offers anything lower than 44100. This can also be done in Audacity (Preferences) itself, if you only want it to happen to this recording. Note: If you're trying to catch the sound of some action you're doing (Which is hard with a low microphone boost), then just set the microphone boost to the middle one instead (In the Control Panel under Sound, remember?). But remember, the higher you set the boost, the more noise you have to remove, and thus, great quality loss.
Category: Education
Uploaded: October 11th, 2008 @ 9:09 pm
Author: LassesIndex
Length: 03:12
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Views: 489
Tags: audacity background crappy how maintain microphone noise on quality reduction to
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