hypersonic sound

Digimode Sounds - Audio recordings of popular and not yet so popular digimodes

Digital Modes Samples - Audio recording of many ham radio digital modes emissions. Sound samples of HF VHF digital signals samples and published by KB9UKD

DX-World.net Soundbites - DX Sound recordings at DX-World.net contributed by visitors

Ham Radio Digital Modes Information - WB8NUT digital modes information page with various digital modes description and sound samples

Morse Code Sound Samples - G4UCJ morse code table with mp3 morse audio samples

PSK31 Fundamentals and Setup - Background: The PSK31 philosophy, The QPSK mode, Varicode, Sound Card DSP Setup and Operating Tips

Making the Most of your PSK31 Signal - Adjusting audio output of your soundcard to obtain a perfect PSK signal from your transmission. A project to help you tuning your PSK31 emission.

Packet with Soundcard - Sound card packet by NM5RM. This amateur radio web site explains how to use the AGWPE utility program to send and receive packet using the sound card or sound chip of your PC instead of a traditional TNC or radio modem

70Mhz Sporadic E report - Sound clips and notes on sporadic E on four meter band

G4ILO : Baofeng in my shirt pocket - UV-3R Review at G4ILO Blog with long textual review, pictures and some sound files

Aldo - Morse tutor - A morse tutor that drives any Linux supported soundcard.

OscarDelta IP Over AX.25 - This is a packet radio software developed for amateur radio operators to provide IP communications. You can chat, send/receive e-mail, surf the web and so on via radio depending on your bandwidth. You don't need a TNC. You might have all of TNC features via SoundCard using SoundModem.

SDR-RADIO.com - SDR-RADIO.com is a Windows console for SDR receivers and transceivers. Designed for the commercial, amateur radio and short-wave listener communities, the console provides a powerful interface for all SDR users. Many SDR owners have made their radios available over the internet. Just look at the Web Servers page for a list of the radios you can use. You do not need a licence to use this sodftware with RFSPACE, FUNcube Dongles, Soundcard (SoftRock) and low-end SDRs.

VIT Voice Keyer - The VIT Voice Keyer is a simple soundcard based voice keyer. It plays various recordings and output them to your radio and key the PTT line.

Sound Byte - Sound Byte is a voice keyer for contests as well as general ham radio use. Windows and Mac, commercial by Black Cat Systems

Audio Kit for iPhone - Audio Kit is a collection of four iphone applications which are essential for those working in audio and sound. A real time Spectrum Analyser, a Scope to display waveforms, an SPL Meter, and a sine wave Signal Generator.

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

Yaesu DSP Settings for Heil Microphones - To achieve maximum audio quality it is important to adjust the DSP settings of your transmitter when using Heil microphones.

Heil Microphones DSP Settings - How adjust DSP settings for your trasmitter when using Heil Sound microphones

Sound Card to Radio Interfacing - Sound card Hamming, PSK31 and other digital modes, CQ amateur radio article by K5ABT

VK2QW Sound Card Interfacing - Computer to transceiver sound card interfacing by VK2QW

The In's and Out's of a Sound Card - October 2003 QST article on working digital mondes with sound card interfaces

A Switchbox for Soundcard Digital Modes - A homebrewed switchbox prooject Don Wilhelm W3FPR

PSK31 interface schematic for Yaesu RTX - Yaesu FT-1000MP, FT-990 and FT-920 packet data port to pc sound card for psk 31 interface.

Multimeter with Sound Blaster - Sound card based multimeter