Pentode is a thermionic valve (a vacuum tube) with five electrodes. Invented in mid-1920s, it remains in use today!
Here's a little song I wrote. It is an electronica/progrock fusion in 5/4 time most of the time, hence the name :)
youtu.be/S46JbZWLueY
#electronica #fusion #pentode #music #original
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