I've been searching on this forum, and I've actually found information that suggests that the answer is no, but I wanted to ask about my situation explicitly in case anyone knows differently. I have an analog stereo signal coming into my SB Audigy 2 on Line-In. I am seeking a means of obtaining real-time Dolby Pro-Logic II processing of this signal for 5-channel speaker output. Overhead is only an issue in that I need the processing to incur a minimal (as in, not human-detectable) delay -- if there is a method that sucks up 99% of my CPU resources while it runs, that's okay. I don't need it for anything else while while I'm processing the signal. Thus far I've found a means of getting Pro-Logic processing via the KX drivers. This is what I use currently, but DPLII would be far superior if it is possible. I've also found a means of processing a line-in signal with GraphEdit and using a filter for DPLII processing, but GraphEdit gives me a buffer latency that I can't change (approximately 500ms IIRC), and I need the processing to be as close to real-time as possible. I will also note -- though I do not know if anyone would be able to provide assistance on this angle -- that I am open to solutions that involve using Linux (with the ALSA emu10k1 driver), as I dual-boot on the target computer. Is there any feasable solution, or am I simply out of luck?