Ted you are now talking about MIDI and unfortunately Audacity as yet does not have a MIDI capability. These effects you have can be added to audio only.

For MIDI editing and recording you will need a keyboard and other software programs plus a MIDI interface. I believe Reaper can handle MIDI. I use Cubase and other Steinberg software for this. Warning this hardware and software is expensive and complicated to use. I only dabble and know the basics. I have been dabbling for years and am still a beginner. LOL.

However if you have a keyboard with all the presets like violins and drums etc you can record that part separately as audio and add FX using Audacity.

It is a case of trying the different fx and experimenting to see what they will do.

Best of luck.