Hi everybody! nice to be here! well I have a (actually two) general question rather than a general question to logic and hoped, that I could get an answer here! however, googling around for some deeper understanding on latency I stumbled over this formula latency=(I/O Buffer Size/Sample Rate)*2 it is stated here http://support.apple.com/kb/HT1314?locale=de_DE and also on some RME site! well I can't make sense of what the input- and what the output-buffer should be! does any audio-stream(well e.g. guitar -> soundcard -> computer -> soundcard) imply those 2 buffers? what exactly is the input-buffer ment for? and of course the same question for the output-buffer? an other thing you maybe could give me an understanding of: is that buffer a memory portion in the RAM or in the sound-card? many thanks!!