Tue Nov 23 12:59:48 EST 2010

PT2399 digital delay IC (Danelectro FAB Echo)

Ordered the FAB Echo for $15 [3].  At first sight this seems to be a
digital delay line with an R-tunable oscillator for the digital

I wonder why the digital oscillator frequency is so high though:
2-20MHz as mentioned in [1].  Is this a sigma-delta delay line with
the signal stored in binary?

[1] http://www.futurlec.com
[2] http://www.diystompboxes.com/smfforum/index.php?topic=64519.0
[3] http://guitars.musiciansfriend.com/product/Danelectro-FAB-Echo-Guitar-Effects-Pedal?sku=151844
[4] http://www.uni-bonn.de/~uzs159/pt2399.html