New CTCSS Detector Plugin for SDR#

CTCSS is an acronym for Continuous Tone-Coded Squelch System and is a system that is used in shared two way radio systems. It is common for a single radio channel to be shared over a number of user groups for frequency use efficiency. CTCSS uses a special tone to identify each group of users, and this tone is used to prevent a group hearing radio chatter from another group sharing the channel.

Over on the SDR# Yahoo Groups forum, a CTCSS detector plugin for SDR# has been posted. The plugin can detect CTCSS tones and provide a squelch for the desired tone. The latest version of the plugin can be downloaded from this link.



  1. HY

    Getting an error when the plugin is used
    when i click enable on it its crash

    Méthode introuvable : ‘Single[] SDRSharp.Radio.FilterBuilder.MakeBandPassKernel(Double, Int32, Double, Double, SDRSharp.Radio.WindowType)’.
    à SDRSharp.CTCSSDecoder.Decoder..ctor(Double sampleRate, Single squelchTone)
    à SDRSharp.CTCSSDecoder.AudioProcessor.Process(Single* buffer, Int32 length)
    à SDRSharp.Radio.StreamHookManager.ProcessAudio(Single* buffer, Int32 length)
    à SDRSharp.Radio.StreamControl.DSPProc()
    à System.Threading.ThreadHelper.ThreadStart_Context(Object state)
    à System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
    à System.Threading.ThreadHelper.ThreadStart()

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