This page explains how to turn on the graphic equalizer for the transmit path. The equalizer runs inside the Flex radio itself, shaping your transmitted audio across eight fixed bands before it leaves the radio.
Enables or disables the equalizer for the currently-selected path (TX or RX). Green when active.
Off
On / Off
TX
Selects the transmit equalizer bands for display and editing.
Checked (restored from previous session)
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RX
Selects the receive equalizer bands for display and editing.
Unchecked
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Reset arc button
Resets all 8 bands of the current path to 0 dB. Tooltip: "Reset all bands to 0 dB".
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63
Trims the 63 Hz band. Value label below the slider updates live. While dragging, a popup displays the formatted dB value with sign (e.g., "+3 dB" or "-10 dB").
0 dB
−10 to +10 dB
125
Trims the 125 Hz band. While dragging, a popup displays the formatted dB value with sign.
0 dB
−10 to +10 dB
250
Trims the 250 Hz band. While dragging, a popup displays the formatted dB value with sign.
0 dB
−10 to +10 dB
500
Trims the 500 Hz band. While dragging, a popup displays the formatted dB value with sign.
0 dB
−10 to +10 dB
1k
Trims the 1 kHz band. While dragging, a popup displays the formatted dB value with sign.
0 dB
−10 to +10 dB
2k
Trims the 2 kHz band. While dragging, a popup displays the formatted dB value with sign.
0 dB
−10 to +10 dB
4k
Trims the 4 kHz band. While dragging, a popup displays the formatted dB value with sign.
0 dB
−10 to +10 dB
8k
Trims the 8 kHz band. While dragging, a popup displays the formatted dB value with sign.
0 dB
−10 to +10 dB
+10 / 0 / -10 dB scale
Reference labels alongside the slider column showing the ±10 dB range.
The TX button is checked by default the first time you open the applet, and AetherSDR remembers which view (RX or TX) you last selected between sessions. Each time you open the applet, it restores the last-used path.
Clicking ON a second time disables the equalizer without clearing your band settings. Your slider positions are preserved.
To start from a flat response before shaping, click the Reset arc button before enabling ON.
When dragging an EQ band slider, a popup appears near the slider handle showing the current value with a "+" sign for positive values (e.g., "+3 dB") and a "-" sign for negative values (e.g., "-5 dB"). The popup lingers briefly after you release the mouse button.
Keyboard nudges (e.g., using assigned shortcuts) also trigger the value popup, providing the same visual feedback as mouse dragging. After a keyboard step, the popup appears and fades with the same linger timeout as a mouse release.
The applet now fully supports theme colors. The EQ slider handle uses the accent color from the active theme, while the slider groove and scale labels use the appropriate background and secondary text colors. The reset button and band labels also adapt to theme colors for a consistent appearance.
ON does not stay lit after clicking — The applet lost its radio connection. Check that AetherSDR is still connected to the radio. Disconnect and reconnect if necessary.
Sliders move but transmitted audio sounds unchanged — Confirm that ON is lit green and that TX is the selected path, not RX.