MultiMode allows you to decode and transmit morse code (CW), RTTY, FAX, SSTV, SITOR-B, NAVTEX, PACKET, ACARS, PSK31, ALE, and many other modes on your Macintosh, without any extra hardware. Just connect your Mac to your radio, and you're all set to go!
Be sure to take a look at our Ham radio digital modes for the iPad
We're so sure that you've find MultiMode useful that we're offering you a risk-free deal. You can go ahead and download a copy of MultiMode for absolutely free. Give it a try, and see how easy it is to use. Once you've decided that you find it useful, go ahead and register your copy. If for some reason you decide MultiMode isn't for you, just throw away your copy. That's it!
What Is MultiMode?MultiMode is an application which allows your Macintosh to decode several different modes of non-voice communication often heard on shortwave. You can also transmit in many of these modes, as well.
In the past, dedicated hardware, often costing hundreds or thousands of dollars, was necessary to demodulate and decode these transmissions. Today, you can use the processing power of your Macintosh to decode and display these modes, without any hardware.
MultiMode features sophisticated digital filters, for pulling weak signals
out of the noise.
What Do I Need To Run MultiMode?MultiMode OSX requires a Macintosh running Mac OS X 10.5 or later. If you are running an older version of Mac OS X, please visit the download page to see what versions may be available for your system Please feel free to download a copy prior to purchase, and see how it works on your system.
You also need a radio capable of tuning in the frequency ranges of interest. If you want to transmit, you'll need a transceiver of course. For most modes, this is a shortwave radio. For ACARS mode, a common VHF band scanner is used.
The audio from your radio (speaker or headphone jack) is fed into your Mac's sound input port, through an appropriate cable. The radio is tuned to the station, and the correct mode is selected. MultiMode has a feature which displays the audio spectrum of the station, as a tuning aid.
For transmitting, you simply connect the audio output of your Mac to the microphone input of your transmitter, possibly through an isolation transformer. There are many devices on the market that can do this for you, or you can do it yourself.
Be sure to take a look at our notes on Interfacing Your Macintosh To Your Transceiver To Run MultiMode
MultiModeOSX Version 6.4.1
As of now, the following modes are implemented, some receive only
Those with an asterisk (*) next to them support transmitting.
Please email your comments and reports to: firstname.lastname@example.org
Download a copy of MultiMode OSX (Version 6.4.1, about 1MB)
Need help? Try our Useful MultiMode Links!
Here's MultiMode OSX displaying received RTTY from Canadian Forces Meteo:
Here's MultiMode OSX in PSK31 mode:
Looking for a way to connect your computer to your Icom rig to control the frequency? Take a look at the Black Cat Systems USB Icom CI-V Interface (Note that this interface does not pass sound)
email@example.com Chris Smolinski, N3JLY
Last modified June 29, 2014