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opl2(1): minor adjustments

--- a/man/1/opl2

+++ b/man/1/opl2

@@ -17,12 +17,14 @@

 The emulated chip is programmed by a stream of commands either from

 .I file

 or from standard in.

-Guided by these commands, it then synthesizes a number of 16 bit little-endian samples for

-the chip's output sampling rate, 49.716 kHz.

-Each is duplicated for stereo sound and written to standard out.

+It then synthesizes stereo 16-bit little-endian PCM samples

+at the chip's sampling rate, 49.716 kHz,

+resamples them to

+.IR audio (3)'s

+default 44.1 kHz rate,

+and writes them to standard out.

 .PP

-Commands are 4 bytes formatted as follows,

-where the size of each field is given in bytes between brackets:

+Commands are 4 bytes wide, in little-endian byte order:

 .PP

 .RS

 .IR register [1]

@@ -40,8 +42,7 @@

 .PP

 The

 .I delay

-field is stored as a 16-bit unsigned integer in little-endian byte order,

-and provides timing.

+field provides timing.

 It is a multiple of a command period, during which the

 .SM OPL2

 chip may be sampled before processing the next command.