another lil tip when speed picking is to accent ur notes eg; if ur doing a chromatic ex on the 12th fret u would do as follows:
(12) -13 -14 -15
v
(accent the 12th ) the next note on the next string basicaly hit it a lil harder
(12)- 13 14 15

so accent the next or first note on the following string that way u can hear the speed build up as u go through ur tech so accent the notes in brackets () :D