* Currently the SSI263 thread is disabled (not even initialized in MB_DSInit()
* Do we need this stuff? Methinks we do, yet we don't have a testcase of
needing it (MB C in 4 & 5 --or-- Phasor in 4 works fine with U5) Wtf?
* soundcore-openal.c : Get the OpenAL state only right after queueing buffer (and restart OpenAL if needed)
* soundcore-openal.c : Handle buffer underruns
* elsewhere : No longer call DSZero...
* this allows for better latency with the 22050Hz sample rate
* keep the mockingboard at the same buffersize to prevent underruns (latency handled differently there)
* Now using OpenAL as the main backend, ALSA has been deprecated...
* soundcore-openal.[hc] - OpenAL sound output for emulator
* alhelpers.[hc] - OpenAL suport files
* mockingboard.[hc] , AY8910.[hc] , SSI263Phonemes.h - Mockingboard support ported from AppleWin ...
