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by kozikowski
Mon Mar 08, 2010 3:18 am
Forum: General Feedback and Discussion
Topic: Recording a conversation
Replies: 2
Views: 550

Re: Recording a conversation

If you have a laptop, it's possible you already have a built-in microphone. It probably won't win any awards for quality, but it might be enough to record a conversation as long as it's in the same room. Keep all other noises off like a TV or radio. Try it out first before you really really need it....
by kozikowski
Mon Mar 08, 2010 3:03 am
Forum: Audio Processing
Topic: Moving The Waveform To 0
Replies: 8
Views: 1518

Re: Moving The Waveform To 0

<<<mewonders if he meant normalize up to zero db for better signal?>>>

Very unlikely. Most people edit in the percent scale...

http://kozco.com/tech/audacity/Audacity1_playback.jpg

...so they wouldn't know where zero dBFS was.

Koz
by kozikowski
Mon Mar 08, 2010 3:00 am
Forum: Audio Processing
Topic: Moving The Waveform To 0
Replies: 8
Views: 1518

Re: Moving The Waveform To 0

<<<dc offset can cause ticks ??>>> It's the leading cause. <<<like when you made a bad splice instead of splicing at a zero crossing>>> You can get a little one there, but it tends to get hidden by the surrounding show. DC offset can give you a clear pop when there's no show sound at all like when y...
by kozikowski
Sun Mar 07, 2010 6:02 pm
Forum: Recording Equipment
Topic: Re: mic for low frequencies
Replies: 22
Views: 5493

Re: mic for low frequencies

Yes, they did work on multiple RF oscillators, but the concept is to change the event into something you can easily measure and then record that instead of trying to turn the event into a varying battery signal right away. I don't think anybody fully appreciates the significance of the specification...
by kozikowski
Sun Mar 07, 2010 5:41 pm
Forum: Windows
Topic: Retrieve files from Export Files?
Replies: 7
Views: 742

Re: Retrieve files from Export Files?

You'll need to wait for one of the Windows Elves to arrive. That's how it works in Windows XP.

What did you call the Export when you named it?

Koz
by kozikowski
Sun Mar 07, 2010 5:22 pm
Forum: Windows
Topic: Very Low levels from recording voice from mike
Replies: 11
Views: 3390

Re: Very Low levels from recording voice from mike

Many of the newer sound cards do not have the +20dB microphone boost. It costs extra and there's no way to make it into a "Feature," so manufacturers have been leaving it out. That kills a lot of analog microphones as they need the extra sound boost to work right.

Koz
by kozikowski
Sun Mar 07, 2010 5:17 pm
Forum: Mac OS X
Topic: Menus grayed out- no edit, export, etc.
Replies: 2
Views: 586

Re: Menus grayed out- no edit, export, etc.

Audacity 1.2 requires you to select some of the show before the menus light up.

Koz
by kozikowski
Sun Mar 07, 2010 6:31 am
Forum: Recording Equipment
Topic: Re: mic for low frequencies
Replies: 22
Views: 5493

Re: mic for low frequencies

I have a minor history in radio transmitters and they're famous for flying blind. You can't actually measure anything, so you have to measure oblique effects and derive the information. Like you know you succeeded in creating radio power when the electrical meter outside the house spins a little fas...
by kozikowski
Sun Mar 07, 2010 6:23 am
Forum: Recording Equipment
Topic: Re: mic for low frequencies
Replies: 22
Views: 5493

Re: mic for low frequencies

OK, lets take this mechanically one at a time. How do you know it's oscillating? What changes? Is there a meter somewhere that goes up and down. Pressure gauge? Color change? Can you feel the table moving?

Koz
by kozikowski
Sun Mar 07, 2010 6:16 am
Forum: Windows
Topic: (SOT) Programmatically detecting normalized wav files
Replies: 10
Views: 1172

Re: (SOT) Programmatically detecting normalized wav files

<<<Normalize the ones I haven't.>>>

Normalize will have no effect on the ones already normalized. That's one of its talents. The Normalize available range of corrections includes zero.

Koz