dungeons and dragons tv - Were weapon sound fx for D&D cartoon created specifically for the series?

When I look at the the image below, I am able to "hear" the sounds of the weapons in my mind:

^{Artwork Credited to Bill Sienkiewicz}

For me, the sound effects for the weapons made the cartoon much more enjoyable.

Were these effects the product of some person (or team) sitting in front their tools (whatever they may have been at the time) and conjuring the best sound?

Or, would they have cycled through existing sound effects created over the years?