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Has anyone compared decoding methods with say a serial port verses sound card/on-board. Or virt/auto/cbl over serial. Just wondering what maybe the best way to decode signals. Problem with serial port is that all or most of the programs for windows don't use serial. I have tried a 4-level decoder on one pc and vac on another at the same time, on the same freq. 900 pager. Seemed the 4-lvl won over the on-board/vac. Thanks, later. PS. I should mention that this was based on a sdr-rtl and a RS pro-2006 or pro-2026 tapped.