Audacity Forum

Thanks for the replies but I'm still not clear on what's happening to audio below the Noise Floor threshold. The precise behaviour depends on all of the other settings, but the general idea is the same in all cases. What a compressor does is to "squash down" (compress) the loud parts (hig...

First thing: check that Nyquist effects are enabled (as per the link in Bill's post). If that does not fix it: I don't use Macs, but I do know that Nyquist effects don't work if Audacity is not installed correctly on a Mac. I'd suggest trashing your current installation and reinstalling. Follow the ...

Audacity should work with Surface Pro - that is, with a "real" Windows operating system and not "rt".

Tell me more about what a new compressor effect should do Along the same lines as Bill, I think the shipped compressor should be as close to "Classic" as possible. There are lots of quirky compressors available as plug-ins. Compressors are not the most simple effects to use. As Bill wrote...

btb4198 wrote:the peaks are 1832 hz and 3401 hz

Where do those numbers come from?

Gale Andrews wrote:I don't think Windows Media Player understands ReplayGain and I think iTunes only respects SoundCheck.

Windows Media Player (12) has its own system - they call it "Automatic Volume Leveling". Apparently it is accessed via:
"Enhancements > Crossfading and Auto Volume Leveling"

Slow attack/release times can work very well for subtly reducing the dynamic range just a little, particularly for classical music which can have a huge dynamic range in an unprocessed recording. It seems that was the only type of use case that the writer of that compressor was considering. I'm +1 f...

The problem is probably the online generator.

This picture shows the online generator waveform (downloaded as a WAV file) in the top track, and an accurate 261 Hz saw wave below it.
Note that the waveform from the online generator is offset vertically from the centre line:

"Pluck" is synthesized in Nyquist (a programming language for audio). It is a Karplus-Strong plucked string oscillator. You can view the Nuquist code by opening the file pluck.ny in a plain text editor (it is in your Audacity plug-ins folder). The core of the Nyquist code is a command SND-...

I'm surprised there is nothing that could simply measure the amplitude of the recording and delete audio which fails to exceed a threshold There is. As koz has already written, it's called a "gate" or "noise gate". There is one available on the Audacity wiki: http://wiki.audacit...