Morse Code Letter Group Listening
Continuous sound reception
Listen to a whole group, type as you listen, then submit when playback finishes.
Progress stays in this browser, is shared between English and Chinese, and is separate from the single-letter course. Nothing is uploaded or synced across devices.
Single-letter listening courseLoading progress…
From Single Letters to Continuous Reception
Complete the E/T group in the single-letter listening course, then start with two-letter groups. Each round uses only letters from your completed listening groups. New letters join your next round; repeated letters such as EE are possible. This course practises random letters, not words or messages.
Character speed controls the rhythm inside each letter. Character gap controls the silence between letters, without stretching the letter itself. You can type while listening, but submit only after the whole group finishes. Replay whenever you need to; only first-play whole-group answers count toward the 8/10 threshold. Correct missed groups later to finish the round and unlock the next length.
Progress stays in this browser. English and Chinese share the same group-course record; the single-letter and alphabet courses keep separate records. Leaving or refreshing preserves the current round and your input without restarting sound automatically. Resetting group progress keeps audio settings and single-letter progress.