The plugin has quite a few configurable sounds which by default are disabled. A disabled sound is 'none' and how the sound should be entered depends on your server's minecraft version.
For getting the sounds list you can use please use this link:
https://helpch.at/docs/version/index.html?org/bukkit/Sound.html
by replacing version with the minecraft version you use.
1.8.8 Example:
https://helpch.at/docs/1.8.8/index.html?org/bukkit/Sound.html
You can also modify the pitch, as explained in the comments of the example below.
sounds.yml
#Use 'none' for no sound#Sounds List - https://helpch.at/docs/version/index.html?org/bukkit/Sound.html#Replace version with your server version^#Example of usage (1.8.8): https://helpch.at/docs/1.8.8/index.html?org/bukkit/Sound.html#sound: 'ORB_PICKUP"#If you want a different pitch, ORB_PICKUP:pitchno-permission-sound:'none'commands:royaleeconomy:purse:#Sounds sent to players who receive the coinsadd-money:'none'remove-money:'none'set-money:'none'bank:#Sounds sent to players who receive the coinsadd-money:'none'remove-money:'none'set-money:'none'sharedbank:#Sounds sent to players who receive the coinsadd-money:'none'remove-money:'none'set-money:'none'balance:own:'none'other:'none'reshop:command-help:'none'open:'none'forceopen:from-player:'none'to-player:'none'pay:from-player:'none'to-player:'none'balancetop:command-help:'none'top-purse:'none'top-bank:'none'top-sharedbank:'none'bank:command-help:'none'bank-balance:'none'bank-balance-other:'none'sharedbank:command-help:'none'sharedbank-balance:'none'sharedbank-balance-other:'none'sharedbank-create:'none'sharedbank-transfer:'none'sharedbank-disband:'none'sharedbank-leave:'none'sharedbank-invite:from-player:'none'to-player:'none'sharedbank-accept:'none'sharedbank-kick:'none'sharedbank-info:'none'talismans:command-help:'none'menu-open:'none'give-command:from-player:'none'to-player:'none'killcoins:'none'piggy-bank:command-help:'none'piggy-bank-get:'none'piggy-bank-give:from-player:'none'to-player:'none'moneybag:command-help:'none'get-command:'none'adminget-command:'none'give-command:from-player:'none'to-player:'none'interest:command-help:'none'speedup:'none'slowdown:'none'reset:'none'force:'none'interest-check:'none'menus:#Click soundsmain-bank-open:'none'bank-withdaw-menu-open:'none'bank-deposit-menu-open:'none'bank-upgrades-menu-open:'none'bank-deposit:'none'bank-withdraw:'none'withdraw-as-bag-click:'none'bank-upgrade:'none'shop-buy:'none'shop-sell:'none'shop-buyback:'none'talisman-upgrade:'none'others:kill-coins-entity-kill:'none'kill-coins-custom-entity-kill:'none'coins-bag-claim:'none'purse-death-coins-take:'none'coins-talisman-give-sound:'none'