[Solved]Upgraded to Knoppix 8.6.1 with Audacity 2.2.2

Audacity 3 Help Forum GNU/Linux
1

Hello, my illustrious Board Leaders and Members,
Some of the relevant build information for the version of Audacity with this Knoppix 8.6.1 is as follows:
Build Information

Check Online
File Format Support
libmad
(MP3 Importing)
Enabled
libvorbis
(Ogg Vorbis Import and Export)
Enabled
libid3tag
(ID3 tag support)
Enabled
libflac
(FLAC import and export)
Enabled
libtwolame
(MP2 export)
Enabled
QuickTime
(Import via QuickTime)
Disabled
ffmpeg
(FFmpeg Import/Export)
Enabled
gstreamer
(Import via GStreamer)
Disabled
Core Libraries
libsoxr
(Sample rate conversion)
Enabled
PortAudio
(Audio playback and recording)
v19
wxWidgets
(Cross-platform GUI library)
3.0.4
Features
Theme
(Dark Theme Extras)
Disabled
Nyquist
(Plug-in support)
Enabled
LADSPA
(Plug-in support)
Enabled
Vamp
(Plug-in support)
Enabled
Audio Units
(Plug-in support)
Disabled
VST
(Plug-in support)
Enabled
LV2
(Plug-in support)
Enabled
PortMixer
(Sound card mixer support)
Enabled
SoundTouch
(Pitch and Tempo Change support)
Enabled
SBSMS
(Extreme Pitch and Tempo Change support)
Enabled
Build Information
Program build date: 
Jul 19 2018
Commit Id:
No revision identifier was provided
Build type:
Release build
Compiler:
GCC 7.3.0
Installation Prefix: 
/usr
Settings folder: 
/home/knoppix/.audacity-data

I have observed an issue despite installed LV2 plugins. Earlier, there used to be a filter called Leveler, which is now currently absent.

Could you kindly advise how to get this filter back?

2

The old leveller effect has been discontinued, but there is a “Leveller” preset in the “Distortion” effect that can produce identical results as the discontinued effect: https://manual.audacityteam.org/man/distortion.html

If you want a clean “limiting” effect, then I’d recommend using the new “Limiter” effect instead: https://manual.audacityteam.org/man/limiter.html

(Please note that the links are for the current 2.3.3 version of Audacity, though I think these two effects are the same in Audacity 2.2.2)

3

Thank you very much for replying to my query.
Apologise for arriving late. So sorry!
I shall check all the inputs and get back ASAP.

Subsequently, I checked, but earlier leveler filter did something else. It amplified the lower amplitudes and reduced higher amplitudes closer to an average amplitude level, so far as I have observed. Am I mistaken in my observation?

Yes, on second attempt, Distortion option leveler button appears to work like earlier. I shall test for sometime and confirm. Thank you once again.

Yes, works. But the parameters were not understood very well. The manual page https://manual.audacityteam.org/man/distortion.html is not thorough.

Could you please help? With pictures, if possible?
Such as:
Upper Threshold Query:What does this signify?
Noise Floor (-80 to -20 dB) Query: What does the lower and higher level signify and what is floor. Is it about Signal that is consider as noise?
Leveling fine adjustment (0 to 100) Query: What does this signify?
Parameter 2 Query: What does this signify?
Degree of Leveling (0 to 5) Query: What does this signify?

Would you like me to create another independent thread? Thanking you in advance.

4

Distortion effects are difficult to describe. It’s best to play with the effect for a while to get a feel for what it does.




  • Upper Threshold (Not used): As it says, the Leveller type distortion does not use this control.
  • Noise Floor (-80 to -20 dB): This is equivalent to the “Noise Threshold” setting in the original “Leveller” effect. It sets the noise threshold for the effect. For audio that is not already at maximum volume, higher threshold settings tend to amplify the audio by a lesser amount, and may reduce the chance of background noise becoming obtrusive.
  • Leveling fine adjustment (0 to 100): The old leveller effect provided 5 degrees of “strength”, from 1 (weakest) to 5 (strongest). The “fine adjustment” control allows you to set in between values. For example, if “Degree of Levelling” is set to “3” and "fine adjustment"is set to 50%, then you get an overall strength of 3 + 50% = 3.5
  • Degree of Leveling (0 to 5): The same as in the original Leveller effect. This controls the amount of levelling that is applied to the signal. When the fine adjustment is at zero, the amounts 0 to 5 are equivalent to the original effect choices: 1 = Light, 2 = Moderate, 3 = Heavy, 4 = Heavier, 5 = Heaviest.
5

Thank you, Sir, for addressing my queries. Your kindness is admired. Once more.
Suppose that someone jumps right to Audacity 2.2.2, how shall the terms be defined without reference to earlier versions? Independently? Could the terms be defined, or could I be led to a webpage which does define these terms extensively? In exact mathematical language? Using Signal to Noise Ratio in decibels, which is a logarithmic unit.
For example, using the ideas of physics/mathematics, voltage amplification/damping could be understood by the following numerical computations, like:
3 dB ≡ 1.414 times the voltage (−)3 dB ≡ damping to the value 0.707
6 dB ≡ 2 times the voltage (−)6 dB ≡ damping to the value 0.5
10 dB ≡ 3.162 times the voltage (−)10 dB ≡ damping to the value 0.316
12 dB ≡ 4 times the voltage (−)12 dB ≡ damping to the value 0.25
20 dB ≡ 10 times the voltage (−)20 dB ≡ damping to the value 0.1

If we consider Voltage to be the quantitative unit to be compared, then voltage amp. Level in dB: L = 20 × log (voltage ratio)
20 instead of 10 as in most applications power is proportional to the square of field(current or voltage, in audio amplification) units. 10 because of the term “Deci”.
Please help. Sir, you might use as much time as required. But kindly try to begin as Ab Initio as possible.