Created Audio modes demystified (markdown)

Audio-modes-demystified.md

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+Games will use one of these:
+
+### DirectSound (DSound)
+
+DDR, popn, etc, including many older versions of games (IIDX24 and below).
+
+Highest latency, but compatible with basically everything. Allows for multiple audio streams.
+
+### WASAPI shared mode
+
+Used by some games.
+
+High latency, compatible with most devices. Allows for multiple streams.
+
+You may need to set "Default Format" to the correct sample rate in Windows audio settings before starting the game.
+
+### WASAPI exclusive mode
+
+IIDX25-30 (LDJ), SDVX (nemsys), Gitadora, etc. Used by most newer games. Only allows one audio stream at a time (i.e., the game takes over all of audio)
+
+Low latency, requires that audio device supports exclusive mode at the correct sample rate. Needs "Allow applications to take exclusive control" setting enabled in Windows audio settings, on by default.
+
+### ASIO
+
+Lowest latency. Requires special audio device to support ASIO, at specific format (e.g., https://iidx.org/infinitas_asio for IIDX, which needs Int24LSB)
+
+