AUDxLEN

        The length of your data in words is stored here.
        So, your data must be an even number of bytes, and
        may not exceed 131,070 bytes.  (i.e.  65535 times
        two.)


        However, it is possible to play waveforms longer
        than 131,070 bytes due to the fact that the Amiga
        buffers the contents of the AUDxLC and AUDxLEN
        registers by using backup registers.  If you change
        the AUDxLC and AUDxLEN registers while the Amiga is
        playing a first word of the sound, then it will
        start playing new data only after the whole sample
        has been finished!  Any of the Amiga's audio
        channels can cause a level 4 interrupt just before
        your sound starts a new waveform cycle.  When this
        interrupt occurs, you know it's safe to change the
        registers.  One warning however:  Interrupts caused
        by high-frequency waveforms can occur quite rapidly.
        Even more rapidly than the operating system can keep
        up!  It's best to leave the audio interrupts alone,
        unless you actually need them.  Just wait a little
        while before changing the AUDxLC and AUDxLEN
        registers and all will work fine.


SEE ALSO: AUDxLC