I could go on and on with words ... but it's the visual picture that you get that seems to be the biggest assistance to getting a great sound out of the drum. This technique is even more evident when playing hand drums ... or mallet instruments. Perhaps James will make a few comments.
I'll limit my comments to mallet instruments - I have some thoughts about the other percussion instruments as well, but I'll focus on my area of expertise.
There are two aspects to this issue, the way the "pulling off/out" motion is being described. One is getting the mallet (stick, hand) away from the bar (drum head, etc.) as quickly as possible. This, to me, is something to strive for, for several reasons:
- most importantly, it helps to maximize the efficiency of the stroke - begin with the mallet in the starting position, move it down towards the bar, strike the bar, bring the mallet back up to the starting position. The more efficient this motion is, the quicker the process is, and the more mallet strokes one can get into a given period of time - thus increasing the speed of the player. Bringing the mallet right back up after striking the bar, and ONLY using the "down-up-down" motion, also eliminates excessive motion, such as preparation strokes (lifting the mallet up an instant before bringing it down on the bar - why? Wasted motion, wasted time. It's like those drivers who routinely veer off to the right before making a left-hand turn.)
- bringing the mallet back up immediately after striking the bar gets it out of the way of the other hand's mallet; this is more of an issue on a mallet instrument than on a drum, given the lateral movements involved in moving from pitch to pitch. The issue is getting one mallet out of the way of the other, again maximizing efficiency of motion. (There are other benefits to this for two-mallet vibes/marimba/xylo playing, but that's moving OT.)
- Unless you're talking about dead strokes (leaving the mallet on the bar), I don't know if the "pulling up" motion actually gets the mallet off of the bar so much more quickly that the sound is noticeably changed. HOWEVER, I think that a player with good technique - and the efficient "down-up" motion described above - will produce a better sound as a result of using quicker, cleaner motion, with the appearance of "lifting off" or "pulling off" the bar being symptomatic rather than causal.
Here's my problem with the idea of teaching a student to "pull the sound out" of a percussion instrument. If the idea is to "pull out" of the bar (drum head, cymbal, etc.), you're going to - consciously or unconsciously - slow down the stroke before the mallet hits the bar - "pulling your punch," for lack of a better term. On a very basic level, you get a percussion instrument to "sound" by transferring the energy from the mallet (stick, hand) to the striking surface. I get my best sound - and over the years, I've had success teaching this way as well - by aiming for a spot
underneath the bar. Let the bar stop the motion of the mallet - that transfers the maximum amount of energy of the mallet (mass X velocity) into the bar, yielding (IMHO) a fuller tone and more volume. The way I explain this to my students is to make reference to the basic motion of swinging a baseball bat or a tennis racket. A batter doesn't stop the motion when he strikes the baseball, he swings through it - same for the tennis player. Now, we're talking about greater velocity and mass when comparing a baseball bat to a marimba mallet, but the basic idea - transferring the maximum amount of energy from the mallet intothe bar - is the same.
I know this may seem contradictory to the idea of bringing the mallet right up off of the bar after striking it, but it's really not.
Bottom line? I agree wholeheartedly with the idea of getting the mallet (stick/hand) off of the striking surface ASAP, for the reasons cited above - but the use of terminology such as "pull the sound out" just doesn't sit well with my concept of sound production. As always, YMMV.