It is a computer voice saying each character, timestretched to a fraction of their original length, likely the fraction needed for the longest one to fit into o

It is a computer voice saying each character, timestretched to a fraction of their original length, likely the fraction needed for the longest one to fit into one frame. I've wasted a lot of time messing around with different sound sources in granular synthesis, and the timbre it produces is unmistakable. You get a similar effect fast forwarding an audio book, depending on the software. EDIT: maybe I spoke to soon, upon further inspection it seems to go up in pitch much too linearly with time. It's definitely a voice synthesis algorithm though, or perhaps one of those synthesisers that use parts from those algorithms to make musical sounds. EDIT2: I think it may be the voice algorithm reading out the character code, with the pitch set to the code * some constant. The jumps in pitch are from when there is a run of undefined codes. Higher numbers take longer to say, so the sound becomes more continuous as it goes on.