diff --git a/doc/7-systems/ted.md b/doc/7-systems/ted.md
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@@ -1,7 +1,10 @@
 # MOS Technology TED
 
 also called 7360/8360, TED stands for Text Editing Device. it's both a video and audio chip of Commodore budget computers, like Plus/4 and 16. 
-It's audio portion is pretty barren - only 2 channels, one can output square wave, other can change between square and noise. Pitch range is limited as well, akin to that of SN76489, and volume control is global.
+
+its audio portion is pretty barren - only 2 channels. one can output square wave and other may be either square or noise.
+pitch range is limited as well, akin to that of SN76489, and volume control is global.
 
 # effects
-TODO
+
+none so far.