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One of the most basic guitar skills are strumming up and down freely. And I have noticed in songs that there usually appears to be a difference in sounds between the two strokes. But when I'm practicing I don't feel that difference between my strokes. My upstrokes and downstrokes sound more or less the same. Which brings me to my question.

What exactly is the difference between the two strokes, in general, apart from the fact that the pick goes in different directions? Do we alter pressure while doing upstrokes? Or do we trace a curved path touching only few of the strings each time for upstrokes and refrain from playing all the 6 strings? Or do we apply more pressure on the bottommost strings and less on the top ones?

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7 Answers 7

Upstrokes and downstrokes do sound totally different.

Upstrokes are "lighter", and you hear the high notes first, and they are hit the hardest, which tend to dominate the sound.

Downstrokes are more "closed", also hear them referred to as "meaner", and the lower notes tend to dominate the sound as they are hit the hardest.

For example, the first bar of Wonderwall, is played with 3 downstrokes. If you play it with 3 upstrokes, it gives the song a strange sounding "lighter" feel, which is incorrect.

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I've always considered downstrokes more powerful because the low notes are hit first. The upstrokes have less power, and are "prettier", or maybe more open. There's definitely a difference between the two. –  Anonymous Jan 22 '11 at 5:25
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+1 "downstrokes more powerful because the low notes are hit first". Order in which the notes are played is the main thing which separates them soundwise I think; low notes are often not caught as cleanly on the upstroke either, plus perhaps slight differences in pick angle on the upstroke can make a difference(assuming a pick is being used of course) –  DRL Jan 22 '11 at 16:18
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Many people find it easier to play upstrokes on the off-beat, when "skanking" in styles like reggae or ska. However, The Specials took a trip to Jamaica to learn from the originators of those styles, and were told to use downstrokes because upstrokes sound too weedy. –  slim Nov 11 '11 at 13:23
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+1 for mentioning that the first hit strings are hit hardest. This is surely the most important, especially if strumming fast. (although you could hit the later strings harder, it definitely wouldn't be as easy...) –  naught101 Sep 19 '12 at 7:31
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Technically there is nothing different, just a slight difference in sound. If you play an upstroke, you are likely to be placing more emphasis on the higher strings, which can be useful in some situations. Playing a downstroke will place more emphasis on the bassier notes, and give good background rhythm while accompanying another player, or recording a song. Using the two techniques together can create good rhythm to another player, or while playing solo.

This video here provides good information about how to use both techniques to create good strumming patterns.

Hope this helps

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"just a slight difference in sound"? Isn't that the whole point of the question? –  naught101 Sep 19 '12 at 7:29
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In an interview in Bass Player Magazine, Jason Newsted talked about how, when he first joined Metallica, James Hetfield insisted he play as much as possible with all downstrokes (until then, he'd played using alternate picking). According to Newsted, Hetfield strongly believed that downstrokes made the rhythm parts sound more powerful, for both bass and guitar, since you could put the whole weight of your arm into it.

For example, the rhythm part on "Master of Puppets" is all downstrokes, which makes it fiendishly more difficult to play than if you use alternate picking. But it sounds heavy and powerful.

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When strumming quickly, upstrokes and downstrokes are generally not going to sound different on their own, although struming with only one or the other can sound forced and a little robotic. Reasons to use one one or the other:

Convenience: If you're strumming a chord immediately after, say, playing on the higher strings, you'll probably play an upstroke, or moving the pickup switch, since you don't have to move your hand as much. This sort of thing comes into play a lot more when picking individual notes.

Arpeggios, or strumming across the strings very slowly: The downstroke, or from lower to higher notes, is probably more common when playing a single chord. Playing an upstroke in this manner can sound a little odd and out of place, and this is often used for effect.

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There is a very distinctive difference between up and down strokes. –  Anonymous Jan 22 '11 at 5:23
    
@Tin Man - have clarified my answer. –  neilfein Jan 22 '11 at 12:46
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My first guitar teacher always tried to convince me volume was the difference, because we somehow had the help of gravity on the way down. I changed guitar teachers shortly thereafter.

In my opinion, the differences are almost always purely tonal quality due to the higher strings being set in motion first. I have very little knowledge of acoustics, but I suspect the sympathetic vibrations of the other strings before you hit them also have something to do with the resulting tone. As a result the upstrokes will have a somewhat lighter feel than the downstrokes. HOWEVER: I believe that it depends on what style you're playing in, how fast you're strumming, how many upstrokes there are where there "should" be downstrokes, etc. I think that a good guitar player, can, in many styles, use his/her choice of strum and still make it sound as desired. Depends on a million different musical aspects of course; hard rock would be more difficult to work it. Light strumming on an acoustic guitar in a quick folk-style song would be easier.

This is my experience as a musician and music educator, not as a professional guitarist, so your mileage may vary. I'd say a general rule would be to use whatever combination results in the sound required without being too difficult or detracting from other elements. If playing all downstrokes even slightly changes the regularity of the pattern, then (in my opinion) you should alternate and focus on getting an even-ness of sound.

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+1 gravity could very well be an important factor. Any motion of the arm creates a torque which has to be counterbalanced by the muscles of the back. –  luser droog Nov 23 '11 at 12:12
    
oh, wait, you dismissed that part. oh well, points for bringing it up! –  luser droog Nov 23 '11 at 12:13
    
+1 From my musical acoustic studies I learnt that the attack of a musical sound is very important for how the sound is perceived. A piano attack with a violin sustain will (largely) be percieved as a piano note, and a violin attack with a piano sustain will (largely) be perceived as a violin note. The guitar attack of an upstroke will always be different than the attack of a downstroke at the very least due to the order of the strings. Thus the sound will be perceived as different. –  Ulf Åkerstedt Jul 20 '13 at 19:46
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There's also an angular difference in how the pick hits the strings. It seems like this ..

If the wrist is doing some of the work, then it must flex, so as you strum downwards the angle that the pick hits the strings is different to on the way back up.

I guess we have our individual styles so I can't predict what the actual difference is, but if your down and upstroke sound the same, maybe you're holding the wrist a bit tense ? Not that there's really a "Right or Wrong". Whatever works for you :-)

I tend to kind of flop my wrist slighlty as strumming down, and opposite again on the way back up (not an exact science .. very human floppy kind of movement), so on the way back up I think the pick hits the strings at more of an off-angle so it's kind of riding over the strings using the rounded part of the pick, wheras on the way down it's more hitting the strings (almost) flat-on. That woudl account for a very different sound.

I've just got some strange looks from practicing this movement while sitting at the computer.

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Everything they said plus the fact that you probably won't be up to tempo since most people don't make it a habit of playing with upstrokes.

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That's what practice is for! Also, an individual may choose not to be like "most people." –  luser droog Nov 23 '11 at 12:16
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