St. Luke’s Episcopal Church in Midtown hosts Haunted Harmonies for Organ on Friday at 7:30 p.m. The listing describes a free seasonal concert, which makes it a low-risk way to hear an instrument whose scale is difficult to reproduce on home speakers.

For someone interested in sound systems and recording, the contrast between deep organ tones in a live room and compressed playback is half the experience. A short concert can be more memorable than another streamed playlist.

Check the church event information and parking details before going. No ticket purchase is required according to the published listing.

What to do: Put Friday 7:30 p.m. on the calendar if a free live-music outing appeals.