Jazz players make a lot of chord changes and reduce string noise by using flat wound or ground wound strings. The drawback is that the tone is not as bright as with regular round wound strings. I've only heard flat wound strings used on an acoustic guitar once and the sound was rather dull. I'm not sure any string manufacturer even makes flat wound strings specifically for acoustic guitar. Some string noise is inevitable when long and fast left-hand movement occurs. You will hear at least a little on the recordings of even great players like Tuck Andress. But there are a few things you can do to minimize the noise: Minimize hand movement: moving up or down several frets can cause string noise. Thoroughly learn as many scale fingerings and chord shapes as you can to minimize the distance you need to move your left hand to change chords. If you know your chords and scales it is possible to play through even complex chord changes without moving more than one fret up or down at a time. Start simple by, for example, playing all chords in a 12-bar blues progression at the same fret. Long movement may sometimes be necessary for a particular voicing but a knowledgeable player can keep left hand movement to a minimum. Here's an exercise I swiped from a tutorial video. Pick a position, say at the 5th fret, and play each major scale in chromatic order BUT stay as close to where you start as possible. In the video the guy did this without reaching more than 2 frets beyond the 4-fret block where he started. You can do the same thing with chords. It takes some thought but it can be done. If you don't know where to start you might try Fretboard Roadmaps by Fred Sokolow or Fretboard Logic SE by Bill Edwards. Lift your fingers: string noise results when you drag your fingers along the strings so lifting your fingers slightly off the string is an obvious solution. Learn to 'grab' chords rather than slide into them. Here's a trick Bob Brozman taught me for learning a new chord: form your fingers into the new shape and strum until you get a clean sound. Then slowly lift your fingers 1/4 inch above the strings and put them back down in the same position. Strum to make sure you are fingering correctly and then repeat. Keep doing this and gradually increase the speed and height off the strings. It won't be long until you have the muscle memory necessary to quickly grab any chord without sliding into it. Bob told me this is how he learns new chord shapes and it has worked well for me. Better living through chemistry: use a string lubricant like Fingerease or Dunlop Ultraglide. I once saw a guitar tech spray half a can of Fingerease onto the neck of Stevie Ray Vaughan's guitar just before he went on stage. The neck was dripping with it - literally! We mortals don't need that much but a little will help reduce string noise and protect your strings from corrosive perspiration and skin oils. (But nothing can protect strings from the way Stevie played!) But a can of Fingerease is a substitute for practice! String lubricant will reduce but cannot eliminate string noise. If you combine it with minimal hand movement and lifting your fingers you can get rid of a lot of finger noise. Hope this helps!