One of around eight effects created for a production of "a tale of two cities"recording of purpose built model guillotine chopping a mixture of veg. 4 mics were used 1 from top, a couple at the bottom and an attached pzm. Result was pitch shifted down.
A remix of this sound::. Http://freesound. Org/people/bronxio/sounds/239067/. Just cut it perfect to 97 bpm, made it only one bar, then threw a phaser and delay. . . Bam!.
For my own obscure reason i took file 389436, looped it so that it repeats at 60 bpm, added about 25% echo, then added bilateral panning at 15 cycles per minute (cpm).