Magnets are used on some cables as RFI elimination devices, however, once that objective has been accomplished I don't see a great advantage in overkill. I personally use the largest magnetic field experienced by man - Earth. When I have my cables lying on the carpeting close to the Earth they do not vibrate much; the job is done. The electrons seem to be far less bunched up than when on cable risers at a distance from Earth. ;)
Personally, I do not see scientifically how attaching magnets with their magnetic field will still mechanical vibrations; all you'll get is vibration in a magnetic field. Has it been demonstrated that sound waves can impede the flow of electrons in cables? And if so, is it audible to the ear? Or is this soft science? I think manufacturers have had enough of a challenge to get single crystal OFC stranding, much less worry over electron pile-ups.
Now, if I had speaker cables attached to a machine which was shaking like a jackhammer, then maybe I'd worry about vibrational interference with sound.
Put enough weight on your ICs and you'll find out about another "vibration" of a different sort, the movement of a cable bending/damaging the terminals on your equipment. Audiophiles almost universally are not happy about heavy cables which yank on posts and terminals. ;)
But, if you must, carry on!