info-mac@uw-beaver (info-mac) (11/17/84)
From: Gustavo Fernandez <FERNANDEZ@SU-SCORE.ARPA>
I finally got the sound driver to not generate clicks between nots using
the free-form wave mode. The two keys are:
Always use buffers which are an even multiple of 370 bytes long.
Do not count the 6 byte header in with the rest of the buffer when
specifying the buffer length. (e.g. use a length of 370 even when
the real buffer takes 376 bytes of memory.
The second of these points is mentioned in passing in the new sound driver
documentation. (Not the old blurb) but the 370(decimal) buffer size is not
implied anywhere. In any case, the wording of the documentation in this
regard is quite ambiguous.
Note that this will only work on the system that came with finder 1.1g
(or later whenever that happens.) This is the first version to fix a bug
in the ROM which would cause clicks unconditionally.
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