The musical note or key that resonates with the solar plexus chakra is E.
This means that singing bowls, tuning forks, chakra drums, didgeridoo, gongs, or any other instruments tuned in the key of E will be in harmonic resonance with the solar plexus chakra and have the power to restore it back into balance and health.
The solar plexus chakra is especially affected by instruments such as organ, harmonium (hand organ) and pyrophone.
If you do not play these instruments yourself, or participate in sound healing therapy, find a song in your playlist that you like that has these instruments in them.
As you listen to music that these instruments are making, tune into your body, especially your stomach and solar plexus area. Feel how your body and emotions are responding to the music. Notice if there is any tightness or tension in your body and upper belly. Allow whatever feeling that comes up be witnessed. Feel into what is there without running away. Just hold yourself through whatever may arise to the surface. Allow yourself to cry, scream, laugh or sing if that is what you need.
After your emotions have been identified and felt, a good way to release and transform the energy further is through breath and movement. Maybe do a firebreath as you listen. Youtube has several videos that show how you may perform a fire breath exercise. You can also dance, shake and allow your body to move in a way that comes naturally as you listen to the sound of these instruments to help move the energy further.