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
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