> we have found that the most effective music to aid prolonged periods of intense concentration tends to have a mixture of the following qualities:
Drones
Noise
Fuzz
Field recordings
Vagueness (Hypnagogia)
Textures without rhythm
Minor complex chords
Early music (Baroque, lute, harpsichord)
Very few drums or vocals
Synth arpeggios
Awesome / daunting / foreboding
Walls of reverb
I personally don't mind a bit of rhythm, but this isn't music that your brain will latch on to and want to pay attention - it's more like pleasant ambient sounds.However, I also suffer from an inability to get things done with people talking - I'm constantly inadvertently eavesdropping on my coworkers' conversations. I find that I have to push white noise up to uncomfortably dangerous levels to drown out conversation - your audio processing systems tolerate shockingly high SNR - but changing, musical audio like this is harder to tune out than thunderstorms or waterfalls and therefore permits me to turn down the volume.
I just wish someone would build an audio-cancelling headset, instead of the usual noise-cancelling ones that take away background noise but let voices come through clearly...