Select Output Device

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Input and Output\SelectOutputDevice F4


As well as the sound card NuMorse Pro can send code to other “devices”. This control panel allows you to select the devices.


Serial Out.


The serial port can be used by NuMorse Professional to operate hardware devices such as a transmitter or flashing lamp. The RS232 RTS line is used via a COM port which is selectable.. This line will toggle up and down as the code elements are sent. You may need to build an interface circuit to drive hardware devices from your PC, or your transceiver may already have a compatible built-in serial interface.

See the Hookup NuMorse help topic for further information on port pinouts and circuits.


Parallel Port.


Check the Parallel  port check box to allow NuMorse Pro to send code to a hardware port. This will usually be the printer port at I/O address 888 (default) although any port address can be selected if the required hardware port address decoding is present. Click on the Options button to access the parallel port settings described below.


The mark bits display indicates the bit pattern sent to the port during code mark (logical high) conditions. By default this is set to all data bits on. You can mouse click to toggle the individual bits if required.


The space bits indicate the bit pattern during code space (logical low) conditions. This defaults to all bits off but each bit can be toggled using mouse clicks.


The Output levels show what signals are being sent to the parallel port in real time.


The ability of NuMorse Pro to send code to a port means that you can hook up a code oscillator or transmitter to your PC and send automatically generated code. (For further details see Hookup NuMorse )



Wave file output group

NuMorse Pro can send audio to a wave file for subsequent playback by other multimedia utilities. You could even record your own Morse code CDROM for audio playback. Click on the Options button to alter Wave file settings.


The Wave File Name can be selected using the browse button and the resulting file open dialog. A feature is provided to allow you to place a limit on the audio file size because audio files can quickly grow to enormous sizes, if no audio file compression is used. Audio file size limits can be removed by setting the slider to the right but please be aware that the first indication of a disk full error message will probably result in you having to shut down your system and reboot before deleting the file.


The Windows ACM (Audio Compression Manager) provides a set of audio file compression utilities and NuMorse Pro is able to take advantage of them. Click on the Compress button to list and select the compression methods available on your system. Here is a brief summary of some compression types available on most Windows systems:


PCM 8000 Hz 16 bit mono

Native PCM as output by NuMorse. No compression.

Microsoft ADPCM

Moderate compression of about 4:1 preserving good audio quality.

GSM 6.10

Large compression ratio of around 10:1 with some loss of quality.

DSP Group TrueSpeech

High compression but with significant loss of quality.


Experiment with the available audio compression utilities to find a suitable balance of quality and compression. You can play the compressed NuMorse Pro audio files back using the standard Windows media player utilities.


Note: If NuMorse Pro is recording an audio file then a small CDROM icon will be shown on the code Play keyboard. If this icon suddenly “grays out” then it means that you have reached the maximum file size.



Check this box to display a semaphore window that flashes on and off while code is playing.


PC Speaker

Check this box to send code to the PC speaker.

Note: NuMorse Pro requires that a soundboard and soundboard drivers are correctly installed even if you will be using the PC speaker for code output.