Single letters with 0.6 seconds of pause before the answer is spoken. There is just enough time to say the letter out loud with ICR (Instant Character Recognition). First, each letter is sent in Morse code. Then it is spoken. And finally, it sent again in Morse code. If you missed something the first time when it was sent, the second time allows you an opportunity to learn it. (More speeds below in the description.)
15wpm — https://youtu.be/X1RNL5C80xE
17wpm — https://youtu.be/8nwjNre55iE
20wpm — https://youtu.be/AUN6NAEXzBs
22wpm — https://youtu.be/4_RkYm3DEz4
25wpm — https://youtu.be/5k5xxIKxY_E
28wpm — https://youtu.be/Ywcev-Y8tHU
30wpm — https://youtu.be/xB4KoK3lDcU
35wpm — https://youtu.be/eLfXdecxjWI
40wpm — https://youtu.be/r65edXIt2TU
45wpm — https://youtu.be/2Cyjbu6AQ-E
50wpm — https://youtu.be/edtoS_BcOFM
There is a comprehensive list of Morse code resources on my Morse code website ( https://morsecode.ninja/practice/index.html ).
73 de AD0WE!
