This Say it Right series is a good job by all! It clarified several things that I did not understand. Can you clear up my confusion about the second tone?
In the Tones 2 video, 徐老师 teaches the 2nd tone as a short "grace note" which rapidly changes to a higher, flat tone at higher volume, but what I hear in the lesson drill and in the recordings of my text book is a more gradual change in tone from low to high. What's more, in my text, it starts quite low.
Am I just hearing it wrong? Should I make efforts to get the sound 徐老师 teaches, or just emulate the recordings of my text?