Audio Tools and Electronics Software

These are programs for testing and analyzing. Included are spectrum analyzers, oscilloscopes, and signal generators. These are all free versions.

WD6CNF hosts a series of useful software, linked individually below.

Audio Spectrum Analyzer Analyzes audio from 10 Hz to 20 kHz, Input from microphone or wave file, Variable displays, Fast Fourier Transform (FFT) display, Variable sample rates (8000 Hz, 11025 Hz, 22050 Hz, 44100 Hz), Variable transform sizes (1k, 2k, 4k, 8k), Upper and lower limits adjustable, Continuous, averaged, peak hold, Selectable foreground/backgrounds, Variable markers (2), Save a reference plot, compare with the foreground plot, Time display (oscilloscope), Triggered sweep, Waterfall display (color or B/W).
Signal Generator
Audio Signal Generator

SpectraScope is a simple Windows interface program allowing your computer to view up to two audio waveforms in either the time or frequency domain. The program is a Windows soft panel operating as a dual channel oscilloscope and spectrum analyzer. The useful frequency of operation is 20 to 10,000 Hz in the time domain and 20 to 20,000 Hz in the frequency domain. The program uses the computer sound card to capture the audio input.
CW Decoder Program Decode Morse code from a radio, 5 to 50 wpm, Scrollable text window, save to a file, Variable text display sizes, upper/lower case, Variable character spacing, Variable speed selection, helps in reducing noise, Spectrum display, waterfall display, timeline display, Variable noise thresholds, noise blanking threshold, Automatic frequency control (AFC),
Transmit Morse code, keyboard input 5 to 50 wpm, Key the transmitter via computer serial (com) port, Synchronize to receive speed, 10 memories, store/recall, Download from a text file, Various transmit modes, Interactive (immediate), Block transfer (send typed screen), Functions keys perform transmit functions. Keep hands on the keyboard, mouse free transmit/receive operation.
Packet Terminal Interface Program Simple Windows based TNC interface program, Designed for ARES operation, Simple operator interface to connect and perform communication functions, Control operator programs screens before operations, Both receive and transmit screens, Operation via single or dual screen modes, Transmit control via TNC commands, Text file transfers.
DSP Filter Program Audio Digital Filter, Two bandpass filters, Three notch filters, Two noise filters, All filters cascadable, Graphical setting of filter center frequency and bandwidth, Drag vertical lines on top of signal, Microphone input, speaker output, Mono, 5 kHz bandwidth, File record and playback filtered audio, Simultaneous operation, Frequency or time display.
Piano Program Musical note capture/display,Tune instruments, or check pitch of voice, Violin, guitar, piano modes, Displays input tone to nearest musical note, Frequency display, Meter center, Hold mode. Useful for both all instruments including wind instruments.
DazyWeb Laboratories – Two channel oscilloscope software for Windows using a soundcard – Audio spectrum analyzer for Windows using a soundcard – Audio Signal generator/wav file player for Windows – Audio test system for Windows using a soundcard
DL4YHF’s Amateur Radio Software: Audio Spectrum Analyzer (“Spectrum Lab”) Spectrum Analyzer with Waterfall Display and real-time audio processing.
VA3AGM DSP Filter PC sound card based Real-time DSP filter and Spectrum scope by VA3AGM. The program takes the input from a audio source. In Rx mode it can be the Line-In of the sound card. The input signal can be filtered using a Low Pass, High Pass or Stop band programmable DSP filter. The processed input is fed to the PC’s speaker. The unprocessed or processed signal can be displayed in the Spectrum Display window. For Tx mode the input is the PC Microphone (you need to interface the PC with the transceiver). Site also lists a PC sound card based Signal Generator that can generate USB, LSB and DSB signal.

See the rest of my links – my new software pages are here: