There are three parameters which are not automatic: the minimum and maximum volume filter settings and the volume threshold setting. The frequency can only be certain values and the closest allowed value will be chosen. If you want to fix the frequency or speed then click on the 'Manual' checkboxes and type in your chosen values. In fully automatic mode, the decoder selects the loudest frequency and adjusts the Morse code speed to fit the data. From these timings it determines if something is a dit, dah, or a sort of space and then converts it into a letter shown in the message box. If the volume in the chosen frequency is louder than the 'Volume threshold' then it is treated as being part of a dit or dah, and otherwise it records a gap (this is shown in the lower graph that looks like a barcode). The spectrogram of the sound is shown in the main graph along with a pink region showing the frequency being analysed.

These programs can, at a minimum, generate waterfalls of digital signals, but may also include other tools useful for analyzing an unknown digital signal.The decoder will analyse sound coming from the microphone or from an audio file. Also see Connect the SDRPlay RSPs via TCP IP to MultiPSK for SDRPlay SDRSĭSP Audio Software that can interface with SDRs.MultiPSK (Note: requires installation of separate DLLs).See Wideband Receivers at ComInt Consulting for a full list.Software Radio Laboratory QS1R 'Quicksilver'.RFSpace SDR products, including Cloud SDR and Cloud IQ.See the Receivers section of the Go2Monitor Specifications for the SDRs supported by Go2Monitor and Go2Decode.Many of the SDRs listed here have links found in the SDRs with HF Coverage article. Please see the HF Software Decoders page for links for the software. These programs can interface with the listed SDRs without the use of additional cables some may require a set of DLLs to be installed. This page is devoted to identifying those SDRs that can either directly interface with various digital decoding programs, or DSP audio programs.įor the purpose of this page, we are not considering the multi-kilobuck professional SDRs, as most hobbyists could never easily afford them.Ĭorrections and additions to this page are solicited.ĭigital Decoding Software that can interface with SDRs

Free cw decoding software