• Spectrum Lab
  DL4YHF's Audio Spectrum Analyser Spectrum Lab or Speclab started as a simple FFT program running under DOS a long time ago, but it is now a specialized audio analyzer, filter, frequency converter, hum filter, data logger and more.Can be used for MTHELL QRSS, DFCW, PSK, MSK, Castle
• Free programmable DSP-Filter
  Free programmable LOW/HIGH/BANDPASS FIR filter in the audio range 0-4kHz
• DSPFilter - MM Hamsoft
  Freeware DSP filter by JE3HHT
• Zakanaka
  A digital mode decoding and terminal program that uses no terminal unit, terminal node controller, or multimode hardware.It does all its decoding using the sound card inside the computer, and it can interface with a radio using a COM port.Zakanaka is an extremely cost-effective way of operating PSK31 and RTTY
• FFTDSP
  FFTDSP is a PC program which can detect weak radio signals in real time. Uses the PC's soundcard and advanced signal processing techniques, extracts and displays weak signals from the receiver audio.
• eSoftAnywhere DSP & more
  Ham radio amateur radio, short wave, CB, DSP software, by VE1EXE (RIP) DSP Software eSoftAnywhere DSP & more Memorial free version.
• Bonito RadioCom
  Decode digital and analog signals out of any high quality Transceiver or Receiver, works as a DSP-analyzing system
• WinDRM - HF Digital Radio Mondiale
  WinDRM is the hottest digital mode on HF today! Nothing else exists where you can transfer data at almost 1KB/s without using proprietary hardware. HF Digital Radio Mondiale allow fast data, pictures, and voice over a 2.5Khz bandwidth
• Soundcard Audio Tools and Toys
  Soundcard audio tools and toys, experimental ideas and utilities.Signal Generator, Frequency-counter / instrument-tuner, Real-time Spectrum Analyser

1. Audio Background Noise Filter free download - Golden Filter Premium, GOM Audio, DSP Audio Filter, and many more programs.
2. A KS filter is a kernel object and is identified by a kernel object handle. In the following figure, the large box in the center is a KS filter that represents an audio device. The data stream flows into the filter from the left, passes through a couple of nodes for processing, and exits the filter on the right.

I have a HL-R4667W/HL set. Recently, the sound on TV shows is dominated by the background music from the TV show. Is there a way to separately control the vol.

• PSK08 for Spectrum Lab- PSK08 for Spectrum Lab.Small user file to configure the software for slow PSK.
• AirMail- AirMail is a HF radio mail program for sending and receiving messages via Pactor, either via the ham radio system or participating marine or commercial services
  [ Hits: 2872 | Votes: 4 | Rating: 9.75 ]
• Bonito RadioCom- Decode digital and analog signals out of any high quality Transceiver or Receiver, works as a DSP-analyzing system
• BR-universal-Filt- Freeware real time DSP filter particularly for applications of amateur radios , IIR, FIR filter, low-pass, high-pass, band-pass filter, band suppressor (notch filter) individually adjustable
  [ Hits: 6077 | Votes: 15 | Rating: 8.26 ]
• Chip64- Download chip64, freeware windows digital mode by IZ8BLY Nino
• CMSK- CMSK is a narrow-band weak signal digital mode for LF and MF ham radio bands defined by ZL2AFP. CMSK63 is the windows client program.
  [ Hits: 766 | Votes: 3 | Rating: 6.33 ]
• Code332- Multitasking data analyzer demodulator and decoder for Windows.
• ComTekk Tone Generator- ComTekk Software Tone generator for 2-way radio signaling. Use sound card to generate CTCSS, DTMF, tone remote, ANI and more. Synthesizer for simulation and testing of 2-way radio systems, repeaters, remote control, ANI, Paging and more
  [ Hits: 2985 | Votes: 2 | Rating: 1 ]
• DSPFilter - MM Hamsoft^pop- Freeware DSP filter by JE3HHT
• DSPRX- Signalprocessing for SSB - Direct Conversion Receiver using Phasemethod for Sideband Supression, does all necessary signalprocessing for Direct conversion Receivers using IQ-mixer for demodulation.
  [ Hits: 2358 | Votes: 0 | Rating: 0 ]
• eSoftAnywhere DSP & more- Ham radio amateur radio, short wave, CB, DSP software, by VE1EXE (RIP) DSP Software eSoftAnywhere DSP & more Memorial free version.
• FDMDV - Digital Voice- FDMDV - Frequency Division Multiplex Digital VoiceDigital Audio over HF SSB.FDMDV is the latest digital voice mode on HF - it caters to high quality digital voice under poor band conditions, in only 1100Hz bandwidth
  [ Hits: 5317 | Votes: 6 | Rating: 7.83 ]
• FFTDSP- FFTDSP is a PC program which can detect weak radio signals in real time. Uses the PC's soundcard and advanced signal processing techniques, extracts and displays weak signals from the receiver audio.
• Free programmable DSP-Filter^pop- Free programmable LOW/HIGH/BANDPASS FIR filter in the audio range 0-4kHz
  [ Hits: 29677 | Votes: 84 | Rating: 5.83 ]
• FreqTweak- FreqTweak is a tool for FFT-based realtime audio spectral manipulation and display for Linux. It provides several algorithms for processing audio data in the frequency domain and a highly interactive GUI to manipulate the associated filters for each. It also provides high-resolution spectral displays in the form of scrolling-raster spectrograms and energy vs frequency plots displaying both pre- and post-processed spectra.
• glfer- glfer is a program for reception and transmission of QRSS/DFCW signals. It is composed of two main parts: the spectrogram window, where you can see the spectrum of the received signal vs. timethe transmission functions, to emit cw characters at a slow but precisely controlled speed, using the QRSS (slow CW) or DFCW (Dual Frequency CW) modes
  [ Hits: 1693 | Votes: 0 | Rating: 0 ]
• HamView- A freeware program to dig out weak signals buried in noise, functionally similar to the excellent FFTDSP of AF9Y, but with the added bonus of real time audio filtering of the incoming signals. Just point and click with the mouse, and the selected signal will stand out from the QRM and noise.
• Hoka Electronics Italia- Decoding and data analyzer software
  [ Hits: 2242 | Votes: 5 | Rating: 7.8 ]
• IZ8BLY Stream- Stream is a software that implements MFSK16 and MFSK8 modes designed by me and Murray Greenman ZL1BPU. It also offers a series of experimental modes based on FEC, interleaving and several modulation techniques (PSK, QPSK, MSK).
• Jason- Jason is a weaksignal communication program, especially tailored for LF work.
  [ Hits: 1085 | Votes: 2 | Rating: 5.5 ]
• Linrad- Multiplatoform freeware DSP software. Linrad has its origin in software that was developed for 144 MHz EME CW but it is quite general and should be seen more like a kit for designing a receiver that a receiver for some particular usage.It can be used as a CW receiver with a small time delay and a fast waterfall graph. A dsp for conventional receiver to imporve signals readability, a spectrum analyzer.
• MeteorSim- HSCW/WSJT meteorscatter/path simulator a first attempt at trying to model meteorscatter events and simulate their transmission characteristics
  [ Hits: 815 | Votes: 2 | Rating: 6.5 ]
• MT63 Terminal- MT63 soundcard program for Windows by IZ8BLY
• NBEMS- The Narrow Band Emergency Messaging System (NBEMS) for Windows is a suite of software programs designed for point-to-point, fast, error-free, emergency messaging up to or over 100 miles distant, and takes up a very minimum of frequency space on the ham bands, leaving more space for other ham activites.
  [ Hits: 1198 | Votes: 1 | Rating: 10 ]
• NU-Tech- NU-Tech is a powerful DSP platform to validate and real-time debug complex algorithms, simply relying on a common PC. Thanks to an easy plug-in architecture, the developer can write his own NUTSs (NU-Tech Satellites) in C++ and immediately plug them into the graphical interface design environment.
• Phase 3D (AO-40) Decoder- This program demodulates the telemetry data signal transmitted by the AO-40 satellite (aka Phase III-D) using the PC sound card
  [ Hits: 1589 | Votes: 1 | Rating: 5 ]
• RoMac 10 Band Equalizer- 10 Band DSP Equalizer for Ham Radio, requires Win 98 or higher, 128 MB, 16 bit sound card.
• ROS ham radio modem- ROS Multimode software for Ham Radio Operators
  [ Hits: 1493 | Votes: 6 | Rating: 8 ]
• S Meter Lite Software- S Meter Lite is a no-cost program that displays your receiver's S Meter signal strength in a window by W8WWV
• ScopeDSP- ScopeDSP analyzes sampled-data signals in the time and frequency domains. It can generate, read, write, window, and plot real and complex digital data signals.
  [ Hits: 759 | Votes: 1 | Rating: 1 ]
• ScopeIIR- ScopeIIR: an Infinite Impulse Response (IIR) digital filter design tool for Windows. It designs high-order IIR filters based on analog filter prototypes, and can design lowpass, highpass, bandpass, and bandstop filters.
• SignalGen- SignalGen is a free (GPL) Linux (Xwindows GUI-based) utility that generates relatively low frequency signals with the use of a PC sound card. It is an entirely suitable replacement for a hardware signal generator if one doesn't require signals of a frequency higher than about 50 KHz. SignalGen creates any frequency between a fraction of one Hertz and an upper limit determined by your sound card's capabilities.
  [ Hits: 1727 | Votes: 2 | Rating: 10 ]
• Signals Analyzer- Signals Analyzer – it is the program, which is designed for the very qualitative analysis of different signals. The main area of SA application is the analysis of unknown or unclear, strange signals.
• Soundcard Audio Tools and Toys- Soundcard audio tools and toys, experimental ideas and utilities.Signal Generator, Frequency-counter / instrument-tuner, Real-time Spectrum Analyser
  [ Hits: 14227 | Votes: 16 | Rating: 7.75 ]
• Spectrum Lab^updatedpop- DL4YHF's Audio Spectrum Analyser Spectrum Lab or Speclab started as a simple FFT program running under DOS a long time ago, but it is now a specialized audio analyzer, filter, frequency converter, hum filter, data logger and more.Can be used for MTHELL QRSS, DFCW, PSK, MSK, Castle
• Voice Descramble- This program descrambles band inverted encrypted transmissions, usually found on VHF/UHF. It uses a NCO (numerical controlled oscillator) to re-produce the originally inverted audio band.
  [ Hits: 5222 | Votes: 25 | Rating: 5.48 ]
• Voice descrambler- This program descrambles band inverted encrypted transmissions, usually found on VHF/UHF. It uses a NCO (numerical controlled oscillator) to re-produce the originally inverted audio band. Use it only if legally permitted in your country. I assume no responsabilities deriving from its use. Standard disclaimer applies
• Voice Shaper- Voice Shaper is a freeware windows speech pre-processor for SSB transceivers. It receives the voice signal from the microphone connected to the soundcard, and sends the processed audio back to the soundcard in real time by Alex Shovkoplyas, VE3NEA
  [ Hits: 5718 | Votes: 7 | Rating: 7.43 ]
• WD6CNF DSP Filter- Audio Digital Filter, two bandpass filters, three notch filters, two noise filtersgraphical setting of filter center frequency and bandwidth Drag vertical lines on top of signal,Microphone input, speaker outputMono, 5 kHz bandwidth
• WinDRM - HF Digital Radio Mondiale- WinDRM is the hottest digital mode on HF today! Nothing else exists where you can transfer data at almost 1KB/s without using proprietary hardware. HF Digital Radio Mondiale allow fast data, pictures, and voice over a 2.5Khz bandwidth
  [ Hits: 15417 | Votes: 18 | Rating: 8.39 ]
• WinMSDSP 2000- Shareware program to receive and transmit high speed CW (morse code) used in MS (amateur radio communication mode) with MS Windows 95/98 and sound card.
• WSJT- WSJT is a computer program for VHF/UHF communication dedicated to EME. Support FSK441 for meteor scatter, JT65: for EME and extreme troposcatter, JT6M: for meteor scatter (optimized for 50 MHz)EME Echo: for measuring your own echoes from the Moon, CW: for EME QSOs using 15 WPM Morse code
  [ Hits: 1733 | Votes: 3 | Rating: 9.33 ]
• WSJT High Speed Meteorscatter- 'Software uses four-tone frequency-shift keying for meteor scatter. WSJT stands for 'Weak Signal communications, by K1JT', and plans call for the program to include more than one communication mode.'
• XPR for Linux- Simple program for ham radio Uses AX25 support built in Linux kernel, works in X11 graphics environment.
  [ Hits: 2208 | Votes: 7 | Rating: 4.85 ]
• Zakanaka- A digital mode decoding and terminal program that uses no terminal unit, terminal node controller, or multimode hardware.It does all its decoding using the sound card inside the computer, and it can interface with a radio using a COM port.Zakanaka is an extremely cost-effective way of operating PSK31 and RTTY

Software

Noise blocking and sound filtering device for windows. With this unique device no noise actually reaches your windows. The Sono is a very sophisticated and innovative design idea, allowing to cancel or filter specific sounds that people found unpleasant. NoiseGator is a light-weight noise gate application that routes audio through an audio input to an audio output. In real-time the audio level is analysed and if the average level is higher than the threshold the audio bypasses as normal. However, if the average level goes below the threshold, the gate closes and the audio is cut.

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