Audacity Forum

Do the highpass filters in the Nyquist library preserve the amplitudes of frequencies below the cutoff, but change phases slightly? Dual question for lowpass. I tried using a highpass filter and then computing the difference between the result and the original. That operation seems to preserve low f...

Of course, I now see that it is format 2, "AM Radio" that is not really demonstrated. But I can discover the url for that file and listen. I will look at the waveforms too.

steve, how did you obtain the sample files from the audible.com link?

Regarding the right frequency bands for steve's band-stop de-essing... I repeated the trick of capturing some sound from audiobooks in Audacity, to get a hint about what more professional producers than I are doing. There is one audiobook whose story and performance I enjoyed a lot, though curiously...

Precarious? Why more so than any other kind of file?

Curious, the technical guidelines at acx.com say this: Format and Method Audiobooks should be recorded in 16 bit / 44.1 kHz wav file format, which is considered CD quality and is best for archiving. Once you have fully produced your audio file it should be saved as a 192kbps mp3. This is the format ...

Perhaps this veers into another topic, but anyway here is the first phrase of Audible's demo of four file formats, as captured by Audacity's "Stereo Mix" (which seems to add a faint amount of noise) and as displayed with the defaults of a 256 Hanning window. What appears to be a bit of signal above ...

Go to audible.com, and just click on the icon for any title, or enter any search for a list of titles. Click on the green arrowhead under the cover image next to the word "Sample" and listen for free. Notice also the different "Audio Formats" which are 2, 3, 4, e, all sampled here: http://www.audibl...

I also see that your default boundary between the modified middle band and the unchanged high frequency band is 8 kHz. My productions via the Audiobook Creation Exchange ultimately get sold through Audible. I noticed something about downloaded titles from Audible. If I play them and capture the wave...

How successful do you consider your experiment? I have not yet tried it nor figured out every detail of the code, but I gather that you have options to apply the effect or to see first the graph of the control signal as one experiments with frequency settings. The complicated thing I put on the Plug...