This program uses code from MMDVMHost for DMR layers 2 and 3:
Copyright Jonathan Naylor G4KLX, Ian Wraith , Patrick Maier DK5MP et al., licensed under GPLv2
Original repository: https://github.com/g4klx/MMDVMHost
Original license located in the src/MMDVM directory.

M17 protocol implementation from the OpenRTX project
https://openrtx.org/
Copyright:
- Niccolò Izzo IU2KIN <n@izzo.sh>
- Silvano Seva IU2KWO <silseva@fastwebnet.it>
- Federico Amedeo Izzo IU2NUO <federico@izzo.pro>
- Frederik Saraci IU2NRO <frederik.saraci@gmail.com>
License: GPL3

LimeSDR blocks with modifications from the gr-limesdr project
https://github.com/myriadrf/gr-limesdr
Copyright 2018 Lime Microsystems info@limemicro.com
License GPL3

CE-SSB blocks from https://github.com/drmpeg/gr-cessb
/* 
 * Copyright 2016 Ron Economos.
 * 
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 * 
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

GNU radio code from
/**
    #
    # Copyright 2005,2007,2012 Free Software Foundation, Inc.
    #
    # This file is part of GNU Radio
    #
    # SPDX-License-Identifier: GPL-3.0-or-later
    #
    #
*/

PacketDataStream and Mumble utilities from umurmur project
/* Copyright (C) 2009-2013, Martin Johansson <martin@fatbob.nu>
   Copyright (C) 2005-2013, Thorvald Natvig <thorvald@natvig.com>

   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.
   - Redistributions in binary form must reproduce the above copyright notice,
     this list of conditions and the following disclaimer in the documentation
     and/or other materials provided with the distribution.
   - Neither the name of the Developers nor the names of its contributors may
     be used to endorse or promote products derived from this software without
     specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/


GNU radio FFT code and UI plotter from the Gqrx project:
/* -*- c++ -*- */
/* + + +   This Software is released under the "Simplified BSD License"  + + +
 * Copyright 2010 Moe Wheatley. All rights reserved.
 * Copyright 2011-2013 Alexandru Csete OZ9AEC
 * FFT history and other small modifications by Adrian Musceac 2020
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY Moe Wheatley ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Moe Wheatley OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of Moe Wheatley.
 */



CFreqCtrl widget from the Gqrx project:
//==========================================================================================
// + + +   This Software is released under the "Simplified BSD License"  + + +
//Copyright 2010 Moe Wheatley. All rights reserved.
//
//Redistribution and use in source and binary forms, with or without modification, are
//permitted provided that the following conditions are met:
//
//   1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
//
//   2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other materials
//    provided with the distribution.
//
//THIS SOFTWARE IS PROVIDED BY Moe Wheatley ``AS IS'' AND ANY EXPRESS OR IMPLIED
//WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
//FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Moe Wheatley OR
//CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
//CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
//ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
//NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
//ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//The views and conclusions contained in the software and documentation are those of the
//authors and should not be interpreted as representing official policies, either expressed
//or implied, of Moe Wheatley.
//==========================================================================================


FFT GNU radio block code from the Gqrx project with modifications:
/* -*- c++ -*- */
/*
 * Gqrx SDR: Software defined radio receiver powered by GNU Radio and Qt
 *           http://gqrx.dk/
 *
 * Copyright 2011-2013 Alexandru Csete OZ9AEC.
 * Modified 2019 by Adrian Musceac YO8RZZ
 *
 * Gqrx is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 *
 * Gqrx is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Gqrx; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */
 
 
Skinned Dial Qt UI widget:
/*

  Graffik Motion Control Application

  Copyright (c) 2011-2013 Dynamic Perception

 This file is part of Graffik.

    Graffik is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Graffik is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Graffik.  If not, see <http://www.gnu.org/licenses/>.

    */

Direct Sequence Spread Spectrum blocks from the gr-dsss project:
/* 
 * Copyright 2014 Eric de Groot (edegroot@email.arizona.edu).
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */
 
Audio filter
/*
 * FIR filter class, by Mike Perkins
 * 
 * a simple C++ class for linear phase FIR filtering
 *
 * For background, see the post http://www.cardinalpeak.com/blog?p=1841
 *
 * Copyright (c) 2013, Cardinal Peak, LLC.  http://www.cardinalpeak.com
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1) Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2) Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 * 
 * 3) Neither the name of Cardinal Peak nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * CARDINAL PEAK, LLC BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
 
End beep sounds: http://www.w2sjw.com/radio_sounds.html (public domain)
end_beep.wav
end_beep1.raw
end_beep2.raw
end_beep.raw
BeepBeep.raw
Caution.raw
data_rec.raw
MDC1200_preamble.raw
MDC1200.raw
MODAT.raw
StatusChange.raw
talk_permit.raw

LED images: copyright Adrian Musceac 2020 (released as public domain)
Button-Blank-Blue-icon.png
Button-Blank-Gray-icon.png
Button-Blank-Green-icon.png
Button-Blank-Red-icon.png
Button-Blank-Yellow-icon.png

Photo of Ten-Tec Orion S Meter, author: Martin Ewing from Wikipedia: https://en.wikipedia.org/wiki/File:Pmeter-t.jpg (public domain)
s-meter-bg-black.png
s-meter-bg-black-small.png

Various images copyright Adrian Musceac, public domain:
constellation_icon_enabled.png
constellation_icon.png
logo.png
transparent-bg.png
white-bg.png
dial-needle.png
dial-background.png

Icons from KDE 4 Oxygen project (LGPL): https://techbase.kde.org/Projects/Oxygen  http://www.kde.org/
application-exit.png
arrow-down.png
arrow-left-double.png
arrow-right-double.png
arrow-up.png
arrow-up-red.png
audio-input-microphone.png
audio-volume-high.png
audio-volume-muted.png
call-start.png
call-stop.png
dialog-close.png
document-save.png
go-down-arrow.png
go-first-view.png
go-last-view.png
icon.png
im-user.png
led-screen-texture.png
list-add.png
list-remove.png
media-record.png
speaker.png
text-speak.png
view-conversation-balloon.png

Liquid Crystal font copyright Chase Babb https://www.dafont.com/liquid-crystal.font (Free for personal and commercial use.)
LiquidCrystal-BoldItalic.otf
LiquidCrystal-Bold.otf
LiquidCrystal-NormalItalic.otf
LiquidCrystal-Normal.otf


Audio compressor code:
// (c) Copyright 2016, Sean Connelly (@voidqk), http://syntheti.cc
// MIT License
// Project Home: https://github.com/voidqk/sndfilter

// biquad filtering based on WebAudio specification:
//   https://webaudio.github.io/web-audio-api/#the-biquadfilternode-interface


// (c) Copyright 2016, Sean Connelly (@voidqk), http://syntheti.cc
// MIT License
// Project Home: https://github.com/voidqk/sndfilter

// dynamics compressor based on WebAudio specification:
//   https://webaudio.github.io/web-audio-api/#the-dynamicscompressornode-interface

// (c) Copyright 2016, Sean Connelly (@voidqk), http://syntheti.cc
// MIT License
// Project Home: https://github.com/voidqk/sndfilter

// biquad filtering based on WebAudio specification:
//   https://webaudio.github.io/web-audio-api/#the-biquadfilternode-interface

