This video demonstrates 5 different - cw keyer - morse code software programs - that you can use to generate morse code audio tones on your computer using your paddles or keys and a serial port or USB SERIAL PORT adapter. One program also allows you to use the 2 mouse buttons for dits and dahs. HERE ARE THE CW SOFTWARE KEYERS mentioned: 1, ehoCW 2. dahdidah cw keyer http : // qsonet . com / setup_ddd . exe (link still works as of [FEB/2023] you will get an unsafe message since the link above is not https... you have to remove the spaces first, i did download dahdidah several times using the above link(without the spaces on 2-8-2023) 3. Morse Keyer 4. softCW 5. CWtype 6. VOICEMEETER info 7. JACKROUTER info NOTE: the output volume on these 5 software cw keyers was set "low" for this video. All the CW keyers have a very pleasant cw note, and use "raised cosine" waveshaping for the edges with adjustable rise and fall time. NOTE: there are a few random pops in the audio, these are from audio buffer OVER or UNDER runs - and not from the software cw keyers themselves. [ The software program used to make this video challenged the CPU.] NOTE: just released in 2018 is the new AD5DZ software CW KEYBOARD - which has incredible features and function as a CW KEYER, CW KEYBOARD and SINE WAVE OSCILLATOR(s)