I don't have the pack, but if you select the mecha and then go to the Modify panel on the right, there should be an option near the bottom to mute the sound associated with the footsteps.

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Hi :)
I bought the pack "Machines and robots." I applied a walking animation on a "mecha", both included with this package. But when I delete the sound affiliated with this animation, it also clears the animation. Can we remove the sound (footsteps) without deleting the animation?
Thank you