Hello, I'm using boost 1.5.1 in windows 7 with vc 2010 express. today I'm trying using boost.iostreams with audio samples, whose char_type is not char or wchar_t. thought I failed at the end, but I guess that I found a bug in the library. In the file boost\iostreams\chain.hpp, line 136, I wonder if it's typedef linked_streambuf<Ch, Tr> streambuf_type; not typedef linked_streambuf<Ch> streambuf_type; Regards, LeiMing