6.13 Spectrum Analyzer
Spectrum Analyzer
This plugin visualizes the frequencies present in the signal it monitors.
- X axis: shows frequencies from 20 Hz to 20,000 Hz, divided into octaves (this makes the X axis appear nonlinear).
- Y axis: shows amplitude from 40 dB to -60 dB (displayed linearly with respect to decibels).
- Linear Spectrum: toggles linear display of frequencies (rather than by octaves).
- Linear Y axis: toggles linear display of amplitude (rather than by decibels).
Spectrum Analyzer
- Waterfall:
- Averaging: enables averaging of display frames.
- Stereo: enables the display of LR channels independently, with the Left channel represented by Blue and the Right channel by Red.
- Peak hold: enables a "ghost" line that shows the peaks of the spectrum.
- Pause/Play button: enables/disables the plugin.
- Snowflake: freezes plugin display (along with the data displayed).
- Frequency Range: alters the range of displayed frequencies.
- Amplitude Range: alters the range of displayed amplitude.
- FFT Block Size: alters the frequency resolution of the display (Higher resolutions come at the cost of FPS).
- FFT Window Type: changes algorithm used to remove FFT-related noise.
- Blackmann-Harris displays the least noise but has low frequency resolution.
- Rectangular displays the most noise but has high frequency resolution.
- X axis: shows frequencies based on the Frequency range drop-down menu.
- Y axis: shows amplitude based on the Amplitude range drop-down menu.
Clicking in the spectrum/waterfall display adds a ruler/cursor with value readouts.
- Envelope Res: alters the resolution of the Peak envelope ("Peak Hold").
- Spectrum Res: alters the resolution of the display curve with fill-in color.
- Falloff Factor: alters the speed at which the peak envelope ("Peak Hold") falls to zero.
- Averaging Weight: alters how the display curve reacts to new samples.
- High value: fast reaction, low jitter reduction. enables real-time spectrogram.
- Low value: slow reaction, high jitter reduction.
- Waterfall Height: alters the time range, or the amount of temporarily stored frames, of displayed frequencies in the Waterfall display.
- Waterfall Gamma: alters the amount of gamma correction in the Waterfall display.
- Window Overlap: alters how many times each FFT sample is processed (higher values can help improve FPS).
- Zero Padding: improves resolution when using a smaller FFT Block size, at the cost of performance.