Boost or cut specific octave bands (63 Hz to 8 kHz)¶
Use the Equalizer applet to raise or lower individual frequency bands on the radio's receive or transmit audio path. Each of the eight bands can be trimmed anywhere from −10 dB to +10 dB.
Before you start¶
- AetherSDR must be connected to the radio. The Equalizer applet requires an active radio connection.
- Decide whether you are shaping the RX or TX path before moving sliders.
Steps¶
- Click the EQ tray button in the right sidebar applet panel to open the Equalizer tile.
- Click TX to edit the transmit path, or click RX to edit the receive path. TX is selected by default when the applet opens.
- Click ON to enable the equalizer for the selected path. ON highlights green when active.
- Drag the slider for the band you want to adjust. Bands are labeled 63, 125, 250, 500, 1k, 2k, 4k, and 8k (Hz and kHz respectively). Drag up to boost, drag down to cut.
- Read the value label directly below each slider handle to confirm the dB amount. The label updates live as you drag.
- Repeat steps 4–5 for any other bands you want to adjust.
What each control does¶
| Control | Type | Default | Range | Behavior |
|---|---|---|---|---|
| ON | Toggle button | Off (unchecked) | On / Off | Enables or disables the equalizer for the currently-selected path. Highlights green when enabled. |
| RX | Toggle button | Unchecked | — | Switches the applet to display and edit the receive equalizer bands. Highlights blue when active. |
| TX | Toggle button | Checked | — | Switches the applet to display and edit the transmit equalizer bands. Highlights blue when active. |
| Reset arc button | Push button | — | — | Resets all 8 bands of the currently-selected path to 0 dB. Tooltip: "Reset all bands to 0 dB". |
| 63 | Vertical slider | 0 dB | −10 to +10 dB | Trims the 63 Hz band for the selected path. |
| 125 | Vertical slider | 0 dB | −10 to +10 dB | Trims the 125 Hz band for the selected path. |
| 250 | Vertical slider | 0 dB | −10 to +10 dB | Trims the 250 Hz band for the selected path. |
| 500 | Vertical slider | 0 dB | −10 to +10 dB | Trims the 500 Hz band for the selected path. |
| 1k | Vertical slider | 0 dB | −10 to +10 dB | Trims the 1 kHz band for the selected path. |
| 2k | Vertical slider | 0 dB | −10 to +10 dB | Trims the 2 kHz band for the selected path. |
| 4k | Vertical slider | 0 dB | −10 to +10 dB | Trims the 4 kHz band for the selected path. |
| 8k | Vertical slider | 0 dB | −10 to +10 dB | Trims the 8 kHz band for the selected path. |
| Per-band value label | Indicator | 0 | −10 through +10 | Shows the live dB value of the slider directly above it. |
Tips¶
- RX and TX settings are independent. Adjusting bands while TX is selected has no effect on the RX curve, and vice versa.
- The +10 / 0 / −10 dB scale labels on the left and right edges of the slider column give a visual reference for the slider midpoint (0 dB) and limits.
- To quickly return all bands to flat without moving each slider individually, click the Reset arc button.
Troubleshooting¶
- Sliders move but audio is not affected — Check that ON is highlighted green for the active path. The equalizer has no effect when ON is unchecked, even if the sliders are set to non-zero values.
- Adjusting sliders on TX path changes what you hear on RX — You may be on the wrong path. Click RX to confirm you are editing the receive bands, or click TX for transmit. The two paths are independent; only the currently-displayed path is being edited.