# Spectrum Analyzer
### Sound Source
Assign a SoundSource here to obtain spectrum data when it plays. This field is optional, meaning it can be left **null**, and the spectrum data source can be set via code at runtime.
## FFT Settings
FFT (*Fast Fourier Transform*) is an algorithm used to extract frequency information from a signal. A larger size provides better precision but comes at a higher performance cost.
**Block Size**\
Number of data samples used for FFT, which can also be considered as frequency resolution. The bigger the size is, the better precision, but also higher performance cost.
**Window Type**\
The [FFTWindow](https://docs.unity3d.com/6000.0/Documentation/ScriptReference/FFTWindow.html) type to use when sampling.
**Channel**\
The target channel from which the spectrum is sampled.
## Amplitube Settings
Instead of using raw spectrum data, BroAudio processes it into **amplitudes** for easier use and better readability.
**Metering**\
The metering type used to calculate the amplitude of each band during updates.
**Attack**\
The time it takes to **raise** a level of 20dB in milliseconds
**Decay**\
The time it takes to **reduce** a level of 20dB in milliseconds
**Smooth**\
Increase this value to smooth the spectrum changes. The higher the value, the smoother it becomes
## Bands
Defines the frequency bands used for analysis.
**Frequency**\
The starting frequency of the band. You can either enter a value manually or adjust it by dragging the lines in the spectrum view above.
**Weight**\
Adjusts the band's response sensitivity, allowing you to emphasize certain frequencies.
## Public Methods
