You can disable Good Decode beep using 123Scan2. Below image shows the location where the setting resides.
from the same utility you can configure an ADF rule to match your barcode criteria and choose the action as beep. Unfortunately this only has 3 beeps.
If you are using a remote management enabled communication protocol (lke SNAPI, IBM Handheld, SSI) you should be able to use Scanner SDK to send a beep you want upon receiving the right barcode event.