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AB
10
30
-120
-40
-- dB
160m
80m
60m
40m
30m
20m
17m
15m
12m
10m
kHz
drag to tune
00.000.000MHz
S0
Instant
S0
Hold
--
SNR
100%
Off
-60-40-20-10-50
100%
Extension
↕ drag to resize
Extension
100%
Audio Visualisation
▼
-60-40-20-10-50
RMS:-∞ dB
Peak:-∞ dB
-- ms
Audio Filters
▼
0msDISABLED
No notch filters added yet
Right click on audio spectrum to add notches
0msDISABLED
Left click on audio spectrum to set bandpass filter. Double click to remove
0msDISABLED⚠ CLIPPING
Auto-learns noise on startup and frequency changes. Continuously adapts to slow variations. Higher strength = more aggressive. Adaptation rate controls how quickly the filter tracks changing noise.
VAD Threshold: lower = more sensitive (triggers on weaker signals). Peak Strength: higher = more aggressive gating. Squelch: outputs silence when no signal detected.
Runs server-side as a DSP insert
0msDISABLED
OPENLevel: -- dB
0msDISABLED⚠ CLIPPING
0msDISABLED⚠ CLIPPING
Creates a wider stereo image from mono audio. Width controls overall effect, Delay adds spatial depth, Separation controls channel independence.
0msDISABLED⚠ CLIPPING
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
0 dB
Active Channels
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Audio Recorder
Stopped
00:00
Note: Recording captures the processed audio output including all active filters and effects.
WebM (Opus codec) — small file, re-encodes audio. WAV — uncompressed PCM capture of decoded audio, larger file.
Set Frequency Offset
What frequency do you expect the tone to be at?
Enter the expected frequency in Hz (e.g., 0 for DC, 1000 for 1 kHz tone).
The system will adjust the dial so this signal appears at 1 kHz.
Clear Filter Settings
Are you sure you want to clear all saved filter settings?
This will remove all saved filter configurations from your browser. This action cannot be undone.
Audio Settings
Select the maximum audio buffer before frames are dropped:
The buffer indicator colors adjust dynamically based on your selection.
Shows playback controls on the lock screen and in the OS media tray.
Disable if you experience issues with audio visualisations. Takes effect immediately.
Which markers the dial-wheel ‹ › arrows and lock-screen ⏮ ⏭ step through.
Embedded Widgets
Uncheck widgets you want to hide. Changes take effect on reload.
Baseband Power
N/A
Noise Density
N/A
SNR
N/A
SNR History (Last 10 Seconds)
Mode Settings
Country Spots
Callsign
Country
Mode
SNR
Grid
Distance
Bearing
Age
Message
Country Spots
Callsign
Country
SNR
WPM
Distance
Bearing
Age
Comment
Download Client
Download the native client for your operating system: