Not far. Positive energy for the environment affects a larger radius than the usual five feet and over a long period of playing, can spread around a good portion of a large event. But other than that, it’s not enough to cover arenas or neighborhoods. Unless, somehow you managed to have the audio playing on some loud speakers that can can be heard by everyone (don’t recommend that unless you don’t mind being annoying lol).
Technically… you can gather energy from somewhere like Sedona rock (energy is very clear and depatterned over there) or perhaps create a large amount of chi energy using the Qi sigil (from energy addendum), then use that energy to amplify the energy output coming from the audio and use your will to to spread to the whole environment. It would be best to be in a meditative state while doing this unless you’re rather advanced. In essence, we’re all much more powerful than radionics machines 