hi greg
your question inspired me and i made a little patch to illustrate, how this could be achieved. there is lots of fun stuff, that one could do with this kind of operation. as you mentioned, one could do stenography with it. but you could also use it as an very strange distortion effect, e.g. "add nth-bit signal of input to original signal". or you could alter the original signal by zero-ing a certain bit out... etc. etc...
yo, thank you for bringing this up... :-)
example-patch: http://romanhaefeli.net/software/pd/bitwise_reading_and_bit_replacement.pd
roman
On Thu, 2007-11-15 at 20:52 -0500, Greg wrote:
Any ideas on how to directly modify bits in audio files? I've tried using a combination of soundfiler with -raw and the bit stuff in expr but no dice. basically i'm trying to get at the least significant bit for the purposes of a watermark/ steganography prototyper.
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de