@dc42
I did a test 'print' without filament using the Klipper ringing part in vase mode at 100mm/s. I tried none, zvd, zvdd, zvddd and with IS off.
The noise sounded 'silkier' with IS enabled and to my ear is the same no matter which type was used.
I did not hear any clunks, clicks or other unusual noises. The highest value for max steps late was 1. I hope that is the new value you are referring to.
Using a speed of 100mm/s I tried all Input Shapers starting with IS disabled. I did M122 at random times during each 'print' to get the following info.
No IS:
M122 Move:
DMs created 83, segments created 9, maxWait 1020ms, bed compensation in use: none, height map offset 0.000, max steps late 1, ebfmin -0.89, ebfmax 0.98
next step interrupt due in 28 ticks, disabled
Moves shaped first try 0, on retry 0, too short 0, wrong shape 0, maybepossible 0
IS "zvd":
M122 Move:
DMs created 83, segments created 22, maxWait 881ms, bed compensation in use: none, height map offset 0.000, max steps late 1, ebfmin -0.79, ebfmax 0.98
next step interrupt due in 6 ticks, disabled
Moves shaped first try 34, on retry 18, too short 63, wrong shape 4, maybepossible 1
IS "zvdd":
M122 Move:
DMs created 83, segments created 33, maxWait 17471ms, bed compensation in use: none, height map offset 0.000, max steps late 1, ebfmin -0.97, ebfmax 0.99
next step interrupt due in 49 ticks, disabled
Moves shaped first try 73, on retry 25, too short 112, wrong shape 9, maybepossible 0
IS "zvddd":
M122 Move:
DMs created 83, segments created 38, maxWait 2364ms, bed compensation in use: none, height map offset 0.000, max steps late 1, ebfmin -0.95, ebfmax 1.00
next step interrupt due in 12 ticks, disabled
Moves shaped first try 114, on retry 65, too short 189, wrong shape 20, maybepossible 0
Let me know if you need any other info or other tests done and I can do them later today.