Spectrum displays a simple frequency graph. The horizontal axis is frequency in Hertz (Hz) and the vertical axis is magnitude in decibels (dB).
| Spectrum Settings | |
|---|---|
| Setting | Description |
| Automatic full frequency range | Automatically sets the frequency (horizontal) axis range to match the current sampling rate of the file. For a sampling rate of 44100Hz the range is set from 0 to 22050Hz (the Nyquist rate). |
| Fixed frequency range | Allows the frequency (horizontal) axis range to be set manually, giving more frequency detail within that range. |
|
From (Hz), To (Hz) |
Sets the frequency range when Fixed frequency range is selected. |
| Show axis | Shows numbers on the horizontal and vertical axes. |
| Logarithmic | Changes the frequency (horizontal) axis from linear to logarithmic. |
| Solid | Fills the area under the spectrum graph with a solid colour. |
| Peak line | Displays a red peak graph showing the highest magnitudes since playback or recording started. Use the stop button to reset the peak line the next playback or recording is started. |
| Average line, alpha |
Displays a yellow average graph showing an approximation of the average magnitudes
since playback or recording started. It is not a true average, but a low pass filtered
difference of magnitudes in time as follows:
M = alpha * Mprevious + (1 - alpha) * Mnew Use alpha to change the rate at which the average changes. A value of 0.999 causes the average to change very slowly. A value of 0.800 causes it to change quickly. Use the stop button to reset the average line the next playback or recording is started. |