Following are a number of back-translations as well as a sample translation for translators of Isaiah 30:32:

• Kupsabiny: “God shall crush the people of Assyria
  to be like when drum sticks are beaten.
  And then, the Israelites shall pluck their lyres
  and shake the tambourines.
  God shall take up his weapons
  and fight those people of Assyria.” (Source: Kupsabiny Back Translation)
• Newari: “With the rod that gives punishment,
  the LORD will strike them all.
  It will happen to the sound of harp and tambourine.
  With the power of his arm he will fight with them.” (Source: Newari Back Translation)
• Hiligaynon: “He will-attack them in battle. And at/with each strike of the LORD against them, simultaneous (with)-this the sound of tambourine and harp.” (Source: Hiligaynon Back Translation)
• English: “And while Yahweh strikes them to punish them,
  his people will celebrate by playing tambourines and harps.
  It will be as though Yahweh will lift up his powerful hand/arm and defeat the Assyrian army in battle.” (Source: Translation for Translators)