Audacity Forum

can I amplify/normalise a capture in either direction as many times as I want, and still be able to put it back again exactly, bit perfect to the original capture, by re-applying the appropriate level of opposite dB amplify/normalise using the same process again. Almost. Lets say for example that y...

1. I read somewhere that normalise and amplify are purely arithmetical You have been reading "Koz" - that is one of his phrases. "Amplify" multiplies each sample value by a given amount. For example, if you amplify by 6.020599913 dB, then each sample value is multiplied by 2. &q...

Does your computer have any audio devices built in or attached?

I'm guessing that you are trying to record sounds that are playing on your computer, using a Windows 7 desktop computer. Is my crystal ball right? If so, see here: Windows Sound Control Panel

What about the frecuency (Hz)? What do you recommend? As Koz says, the recording (before converting to MP3) should be a good clean recording. I'd recommend recording with a sample rate of 44100 Hz and 32 bit float. Leave the format like that throughout the production process. Convert to MP3 at the ...

When using "CBR" (constant bit rate), the "bit rate" (kbps) that you select in the MP3 export settings is the bit rate that you get. If you select 128 kbps, then there will be 128 thousand data bits for each second of audio, regardless of whether the track is mono or stereo. If t...

I think that is due to an old Nyquist bug that has now been fixed.
Please try this version:

In viewtopic.php?f=28&t=68793#p195694 you were recommending absolute + filter as best for non-constant offset. That was before I had invented "Dynamic Bias Adjustment" ;) Three posts later: http://forum.audacityteam.org/viewtopic.php?p=195714#p195714 There is now an updated version of...

Can you post a WAV file of that - it might be easier. It was just a temporary test tone. I don't remember the frequency that I used, but this file has the same offset: bias.wav Sorry I am not following what these "bias measurement" values are showing. They are showing the amount that the ...

Trebor wrote:I'm experiencing an intermittent me an error with that (1.24 KiB) version ...

I'm not able to reproduce the problem.
Could you try running the effect using the "Debug" button. If it fails it should show some debug information. Please copy and paste any debug output to your reply.

Is the dynamic always the best method? Or high pass if you can be sure to avoid clicks? Or have you got to use different methods each time? Based on my Nyquist implementation of "dynamic bias adjustment": "Dynamic" is best if there is a changing bias. "Absolute" is mar...