### AUDxPER

```        A sound's frequency is determined by the value
stored here.  The lowest value you should use is
124, since this is about as fast as the Amiga can
go.  The highest value is 65535.  NOTE:  You MAY use
lower values than 124 on multisync modes.

How you determine the period depends on how you get
your waveform data.  If you use a digitizer and the
frequency is in Samples-per-second, use this
equation:                   3579546
AUDxPER = --------------------
Samples-per-second

If you have a group of data that you want played as
an "instrument", use this:
3579546
AUDxPER =  -------------------------------------
Bytes-Length * Frequency to be played

Of course, the frequency for a given note may be
calculated by the old standby:
Frequency = Base * 2 ^ (1/12)

Which calculates the frequency for the next note
once given a frequency.  Middle C comes in at 261.4 Hz.

If you don't want your sound to repeat, you should
consider one more thing:  when to stop the sound.
You see, the faster you play the sound, the faster
its going to finish.  To figure out how long to let
it play, use the following equation:
uSec = .279365 * Period * Length
Where uSec, is of course, the time in microseconds
it takes to play your sound once.
```