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Laptop reverb Answered

i have a laptop running vista and is a compact.it has a built in mic every time i try to record i get some very annoying reverb even with the speakers muted i one installed a virtual line in but then uninstalled it. can any one help. i included a small 3 to demonstrate what happens. i would recomend putting the volume down the piano is soft but the reverb is not

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chrischavez (author)2008-10-05

thanks every one i fixed it i dont know what i did though. all i did was click restore to default ant that seemed to fix my problem.

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gmoon (author)2008-10-05

You're recording from two sources at once--the line in and the mix.
Do as Nacho says--double-click on the system tray speaker, then "Options->Properties" In the Properties box (if your system is like mine), there should be a mixer device choice at the top. Change that to "line in / mic in".

There should be something like a "stereo mix" control visible. Experiment with how that interacts with the line in / mic in sliders.

Depending on the recording program you're using, it's settings may override the system tray settings...


Yes, this is definitely positive feedback (inserting part of the output signal in-phase back into the input.) Positive feedback usually reinforces the signal in a cascade fashion, up to the limits of the amplification / audio system.

It's easiest to think of this in terms of guitar feedback--the "dry" signal from the pickups is fed to an amplifier. That kicks out the same signal at high volume, which vibrates the strings even more (being the same resonant frequency), which is fed back to the pickups, which goes to the amplifier, which vibrates the strings more, and so on, etc., etc., etc. Since the actual bodies of archtop (hollow) guitars are designed to resonate easily with the stings, they usually feedback to an extreme degree.

Conversely, negative feedback (180 degrees out-of-phase) is used to tame oscillations and touchy audio circuits. So positive is bad, negative is good.

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NachoMahma (author)2008-10-04

. Here's how to do it in XP. Should be similar in Vista. 1) Right-click the speaker icon in the notification area (bottom right corner in XP) and select Open Volume Control (or just double-click on the icon). Or open the Sounds and Audio Devices Control Panel, then click Advanced. 2) Set all unused inputs to zero (or use the mute box).

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chrischavez (author)NachoMahma2008-10-04

but i only have one mic input and a speaker if i mute the speaker i still get the reverb. i mute the mic but i cant record

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NachoMahma (author)chrischavez2008-10-04

. What you have is feedback, not reverb (an echo type effect). Somehow, the output is being looped back into the input. . You may have to dig pretty deep into your audio config, but, in a nutshell, you want to setup Windows and your audio app so that you don't have any feedback loops. I'd check the inputs first and make sure none of them get their signal from an output.

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chrischavez (author)NachoMahma2008-10-04

it only happens when the sound is loud enough but ill check

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NachoMahma (author)chrischavez2008-10-04

. caitlinsdad may be right. Still sounds like feedback to me, but I'm no expert (not even close).

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caitlinsdad (author)NachoMahma2008-10-04

Listen to Carlos Santana, that is controlled feedback. Listen to the tone of his guitar. That is distortion. Listen to rap. That is noise. Ok, I'll get burned for that...

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NachoMahma (author)caitlinsdad2008-10-04

. The Truth ain't always pretty.
. <cue Twilight Zone theme music> I've was listening the CS today! Showing my Guatemalan neighbors what real Latin music sounds like. heehee

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caitlinsdad (author)NachoMahma2008-10-04

And I suppose pan-flutes playing the soundtrack selections from "The Graduate" doesn't rock your boat? Be careful if they show you where the real game of soccer came from...heehee.

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NachoMahma (author)caitlinsdad2008-10-05

. I knew a gal that liked to listen to Zamfir as she went to sleep. I'm not a big Pan fan, but there are some very pleasant associations. . > the real game of soccer . Ewwwwww! That's gross! . They're very good kids. Four of them from 6-18. The youngest switches between Spanish and English about every three words when he gets excited. They come over a few times a week to surf the 'Net/print out homework/&c.; . Evidently, the way I (try to) speak Spanish is extremely funny to those that can. I keep telling them that it's not polite to laugh at an old man, but they don't listen.

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caitlinsdad (author)2008-10-04

On the soundcard the only thing you can plug into the MIC IN input is a microphone that is specifically a computer microphone. The only things you should hook up to the LINE IN input is stuff from phonos, cd players, or outputs specifically designated LINE OUT. When you try to pump in output from HEADPHONE OUT from a keyboard/ipods or a standard microphone that has a plug to fit in the jack, the output is too "hot" and will overload the signal causing all the noise. It may be okay for a few low notes before it buzzes. In order to "match" the LINE IN levels, you need to put all of your regular microphones and instruments through a pre-amp, mixer or attenuating device. You might want to consider a USB interface/box for connecting all of your instruments and mics for recording.

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Lithium Rain (author)2008-10-04

Yeah, I know what you mean. Are you doing it in sound recorder? That's icky in vista. Try audacity.

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chrischavez (author)Lithium Rain2008-10-04

no i am using mixcraft sort of like mac garage band

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Lithium Rain (author)chrischavez2008-10-04

Hmm. Have you tried a different microphone? I mean an external one?

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chrischavez (author)Lithium Rain2008-10-04

i am i connected a keyboard via the mic jack but it does not matter whether or not i use any thing else

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Lithium Rain (author)chrischavez2008-10-04

You've connected a keyboard via the mike jack?

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chrischavez (author)Lithium Rain2008-10-04

yes but it could be a microphone and the same thing happens

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chrischavez (author)chrischavez2008-10-04

the keyboard has a headphone out

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Lithium Rain (author)chrischavez2008-10-04

Ah, I see now, I was confused for a moment...

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