I might be the only one that finds dubstep or techno useful in focusing when working on large spreadsheets, headphones at 11 :)
I tried to listen to Audimachine and found I wanted to spend more time listening. I really enjoyed Existence.
Thanks for the recommendation. And if you are looking, J. Ralph is also worth a listen.
i know a little something about this stuff... if you are looking to mask the outside world, a noise masking system is better than a melodic source. You can still play music over it.
The other ones I use quite a bit are Brian Eno’s Music for Airports, and the various Brian Eno apps, I have iOS. I also use California Guitar Trio.