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Black Cat ALE

A full featured program that decodes and displays ALE Automatic Link Establishment transmissions, available for macOS and Windows.

Tune your HF / shortwave radio or SDR to an ALE frequency and feed the audio into your computer's sound card input, and start receiving and displaying ALE transmissions in minutes.

Works great with SDR software and virtual audio cables! Run up to 24 ALE decoders (depending on the version of the program) in parallel at the same time, each tuned to a different frequency.

You can change the color scheme and font type/size to your preferences.

Black Cat ALE is available for download and trial prior to purchase, so you can make sure it works correctly with your setup. It's available for Windows 8 and 10 (Windows 7 is not supported) as well as macOS.

Two flavors are available, one allowing you to use up to three decoders, and the other up to 24 decodes. Note that using multiple decoders can be very CPU intensive, so please make sure your computer has enough processing power.

Nils Schiffhauer DK8OK has written a blog entry about Black Cat ALE, which also provides some useful usage tips, and is well worth reading.

Paolo Romani IZ1MLL has also written a guide to using Black Cat ALE with detailed information about setup and use.

Buy Your Copy of Black Cat ALE Today

Start decoding ALE transmissions in just minutes!

$29.99 Registration code sent by email, software download

Black Cat ALE is only $29.99 (Introductory pricing) for the regular version, which supports up to three ALE decoders running in parallel at the same time. Purchase also entitles you to all updates and new versions released over the next full year, free of charge, which of course you can continue to use forever.

The 24 decoder Pro version of Black Cat ALE is $99.99 (Introductory pricing), please contact us for license code ordering information for at info@blackcatsystems.com

Free To Try!

Not sure you're ready to buy Black Cat ALE? You can download a fully featured copy to try out, before you buy it.


Beta Versions:

Preliminary beta versions. Likely to have bugs. Features/appearance/operation will evolve, perhaps substantially, over time. As updates can always break things, or change program features/operation, please be sure to keep a copy of your existing version when download a new version.

Black Cat ALE 0.3.01 for Windows - Windows 8 / Windows 10 - 8 November 2021


Black Cat ALE 0.3.0b1 for Mac OS X - Mac OS X 10.10 to Big Sur - 8 November 2021


A virtual audio cable/driver is required for use with SDR programs. We have a list of third party programs here.



Email your comments and questions to info@blackcatsystems.com

Last modified November 16, 2021