Linux Studio Plugins Project

# Spectrum Analyzer x1

Detailed: LSP Spectrum Analyzer x1 (SA1)

Formats: CLAP, GST, JACK, LADSPA, LV2, VST2, VST3

Categories: Analyser

Developer: Vladimir Sadovnikov

Description:

This plugin performs spectral analysis of a single audio channel. It does not affect any changes to the input signal, so can be placed anywhere where the metering is needed.

Common controls:

- Bypass - bypass switch, when turned on (led indicator is shining), the plugin does not work.
- Mode - depending on operating modes, different analysis can be performed:

- Analyzer - performs analysis of a single audio channel.
- Mastering - performs less accurate but more demonstrative analysis of a single audio channel.
- Spectralizer - draws spectral analysis of single channel.

- Freeze - immediately freezes all frequency graphs.
- Linear frequency - enables linear scale of the frequency on the horizontal axis instead of logarithmic one.
- Inspect - enables band-pass filter applied to audio signal when moving vertical frequency slider on the graph.
- Inspect range - the frequency range in octaves of the band-pass filter.
- Spectrogram - the rendering mechanism of the spectrogram in the Spectralizer mode:

- Rainbow - each dot on a spectrogram changes it's color's hue component depending on the amplitude of the signal starting with Hue of the selected channel.
- Fog - each dot on a spectrogram changes it's transparency depending on the amplitude of the signal.
- Color - each dot on a spectrogram changes it's color's saturation component depending on the amplitude of the signal.
- Lightning - each dot changes it's solor's lightness component depending on the amplitude of the signal, the Hue is interpreted as a middle value of the possible value range.
- Lightness - each dot changes it's solor's lightness component depending on the amplitude of the signal, the Hue is interpreted as a maximum value of the possible value range.

- Measure - Additional button that enables horizontal measuring line.
- Log dots - the way how dots on the spectrogram are rendered. When button is down, logarithmic scale is used to translate amplitude into dot's color.
- Line size - the combo box that allows to change the thickness of the lines on the spectrum graph.

Channel controls:

- On - turns on the analysis of the channel.
- Hold - forces the frequency graph of the channel to freeze.
- Shift - allows to adjust the gain of the channel.
- Preamp - allows to adjust the overall gain of the analysis.
- Link - stereo link, allows to add signal to the input channel passed from the shared memory link.
- Selector - allows to select the available frequency for level metering.
- Reactivity - the reactivity (smoothness) of the spectral analysis.
- Level - the level of the selected frequency.
- Window - the window applied to the audio data before processing.
- Tolerance - the number of points for the FFT (Fast Fourier Transform) analysis.
- Envelope - the envelope compensation of the signal.
- History - Show chart with maximum registered peak values among the full frequency range of all channels.
- Clear - Clear charts with maximum retistered peak values among the full frequency range.
- Zoom - zoom fader, allows to adjust zoom on the frequency chart.

Meters:

- Frequency - the current frequency selected by Selector control.
- Level - the level of the selected Frequency.