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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. Spectrum Lab is a free audio analysis tool, lets you see the hidden world of sound. It analyzes live audio or recordings, showing you the exact frequencies present. Watch sounds change over time with a waterfall display. Need to clean up your audio? It can filter out noise in real-time. Even play with radio signals by decoding and creating special modes! While ideal for amateur radio enthusiasts, anyone can explore the science of sound for free.

Ham radio pictures, qsl and sounds archive by K8CX

signals and sounds available on shortwave/vhf radio today along with information on the available equipment needed to understand, analyze or identify these signals

Lots of sounds recordings

HotPaw MorseDecoder for iPhone and iPad. Translates sounds from mic to text. Includes a DSP narrow band filter.

Clips of DX audio, some dating back to the late 70's to early 80's and up to March 2001

Sound samples of the transmission modes recorded at 11025 samples per second, mono and the message in all of the samples is the same: "the quick brown fox jumps over the lazy dog 1234567890".

You've heard MS pings, of course. But what does a HSCW ping sound like?

A powerpoint presentation of the D-STAR operating mode by K7VE includes d-star sound samples

Morse Pilup Audio tapes available also in Real Audio format.

Chip64 mp3 file

Information and digital audio samples of various modem modulation types

Few recordings of difficult qso's

Several files with examples of sounds from digital radio modes on short wave. PSK, RTTY Hellschreiber MFSK FSK Sitor

Audio and waterfall images of some sounds found on the RF spectrum

Sounds of Space Weather by S. McGreevy, N6NKS

Real audio sounds clips

Useful pages of longwave operations, includes a lot of reference files, beacons list, sounds and pictures

Real Audio files containing interesting examples of VHF DX propagation from Sydney, Australia

Beacons recorded audio files by kl7fdq

Audio files to help identify rf noise (rfi). Identify the RFI that interferes with your reception. RFI Noise identification.

Preview the waterfall signature of various digital signals and listen to the sound of the digital modes. Learn about the bandwidth requirements and why a linear transmitter path is critical to successful and correct use of many modes on the amateur bands by W1HKJ

Speakers for Amateur Radio, 2-Way Radio, Shortwave and Scanner listening

Sounds from the 136 kHz band

Sounds of the hf digital radio modes

MP3 and Wav files of some stations recorded on HF anc VHF bands by K9MU

This wiki is intended to help identify radio signals through example sounds and waterfall images. Most signals are received and recorded using a software defined radio

Sorted by Intermodulation. Best receiver first. This is a measure of how badly a close-spaced signal will trash your receiving with spurious signals or splatter sounds,

Audio Repeater is a windows application tha allows you to transfer, transmit, sounds from an input audio endpoint or device to an output one Playback. Audio transfer can be performed in any PCM audio format supported by Windows. KS version communicates directly with audio driver, bypassing all additional Windows audio processing

A sound file collection of QRP contacts by AE5X

Always wanted to know what kind of sounds we hear, when listening to the radio? Here are some examples

If you have been hearing something that sounds like music on the HF bands laterly, it may not be your imagination, QST Article by WB8IMY at ZS6WR web site

Living in a no antenna deed restricted community sounds bad for a HAM, but it means you just need to be more creative. I have found this will not stop your DXCC activities and many of my local HAM club members will agree

In this page you will find soundtracks from various space objects including satellites, manned and unmanned space ships and space stations.

Sound recordings of meteors and things reflecting TV station video carriers , frequencies used are analog TV video carrier frequencies offset by 1 kHz SSB

Vox recorder is activated by voice and sounds exceeding a threshold. It saves for every record a .caf file that you can play, delete or send by email. Useful for surveillance records, hamradio scanners, and many many other applications. You'll be surprised to hear what happens in an all night using Vox recorder.

An Android based CW practice program based on simulated QSOs. The app will generate Morse code sounds from 5-50 words per minute.

A true detective story about a interesting repair project, putting back to life a malfunctioning HP 8753C VNA that was rebooting after startup with noise and clicking sounds produced by the attenuator and switch relays.

Definition of the Robust Packet digital mode with sample sounds and description of main features. Includes references to software used to operate in this mode and frequencies to be used.

This project builds into a box into which you plug a Morse Code Key. Using the Morse Key creates realistic sounds so you can judge how well you Send. A great tool for beginners to improve Morse sending skills before going on-air

Single-sideband (SSB) radio enhances spectral efficiency but poses challenges with audio intelligibility, particularly in noisy conditions. A microphone audio compressor addresses these issues by dynamically managing the audio signal’s dynamic range. It amplifies quiet sounds and attenuates loud ones, ensuring consistent audio levels for improved clarity. Benefits include increased intelligibility, higher average power, and reduced spurious emissions. While essential for optimal SSB performance, careful parameter adjustment is crucial to balance natural sound quality and effective communication across various operating modes.

MyWaveRecorder is a lightweight utility designed to capture and save any audio played on your computer. Whether it’s sounds generated by programs like CW_PLAYER, WX_PLAYER, MyWaveRecorder itself, your microphone, your sound card, or even streaming audio from the internet, this tool records them all with a single click.

Morse News reads RSS/Atom messages and translates them into Morse code, playable as CW radio tones, spark-gap sounds, telegraph clicks, or via a physical telegraph sounder. It supports Farnsworth effects, natural American Morse timing, and realistic audio enhancements. Twitter integration allows user-generated Morse messages.