On Sat, Feb 16, 2013 at 8:24 PM, Harold Hallikainen wrote: > Haven't used that part, but have a current project using the AK7754 . It > also has a graphical design program that includes filters, equalizers, > compressors, etc. Code is loaded through I2C. Hi Harold, Interesting site, thanks for the tip. I'm guessing the GUI becomes available after you get in touch with them? How are they for availability in North America? One thing I'm finding a bit confusing as I research all of this is trying to figure out exactly which chips I'll need to expand whatever DSP I choose. For my application, I think at minimum I need 6 in/2 out for the inputs to my headphones, and 1 in/3 out for the mic section. The second could be done with discrete opamps rather easily though. It looks like I'll need to add an external ADC for some (or all) of those channels. No big deal, but I guess I will need to decide if I need an ADC or an ADC/Codec based on the ultimate choice of DSP, correct? Thanks! Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .