Some time ago, I tried putting together a concept song. The concept was, however, falling to sleep. Based on my reading in the past that dance music that you find in clubs is typically around the 144 BPM range because that’s the average heartrate during aerobic exercise, I wondered what it would be like to try and coerce the heartrate down to a full rest (estimated at 60 BPM) from 80 BPM (generally considered the upper end of the healthy heartrate range).
The first iteration of this a few years back had the ever slowing tempo, but I wasn’t terribly happy with the music. This time I went with a much simpler concept: descending chords (Ema9 > Dma9 > Cma9 > Bm7 > Am7 > Gma9 > Fma9, repeat ad nauseum) that morph from one patch to another. To this I added a white noise track that is unhearable at first but slowly ascends in volume over the duration of the track as the tempo slows.
During the (relatively short time in) development I kept finding myself almost tense during the beginning as I anticipated the slowing tempo. But I was relaxed at the end, so hopefully you’ll feel the same. This is more an exercise in biology than anything. Feel free to comment, suggest additions or changes, etc.