Rev Soft Inc has developed a Guitar Sound Effect Plugin that can be used with the Perfect Piano and Walk Band apps. It is a Steel String Guitar Sound Plugin that cannot be run alone and requires Perfect Piano to be installed first. The plugin is free to use and falls under the category of multimedia with a subcategory of music and radio.

To use the plugin, users need to enter the Keyboard screen and select the switch instrument icon. The Cello icon will automatically show up, and users can select it to load the new sound. Rev Soft Inc suggests changing the sustain time through app settings to make the sound more comfortable.

Overall, the Guitar Sound Effect Plugin by Rev Soft Inc is a useful addition for Perfect Piano and Walk Band users who want to incorporate a steel string guitar sound into their music. Any issues can be reported to the developer at