Expert Sleepers Augustus Loop v1.8.0 - Manual (Page 25)

When the button is turned off, the behaviour is most like a tape delay, in that the play
heads slide along the tape to their new positions. This will inevitably produce some odd
sounds if the tape is not empty (which may of course be exactly what you want).
With the button on, the play heads move instantly, which is not how a physical tape delay
works, but allows you to change the delay time without the unusual sounds.
In fact, it is a little more complex than just described - the play heads don't move instantly.
Rather, new play heads are created at the new positions and the sound from these is faded
in as the sounds from the old heads are faded out. The duration of this crossfade is con-
trolled by the 'Inertia Fade' knob (set in milliseconds).
Digital Mode
'Digital Mode' is activated using the button so labelled (in the Misc group).
In this mode, some of the tape simulation processing is disabled, allowing for
perfectly clean, 'digital' looping, with no colouration/degradation of the
sound as it loops.
Even with the digital mode button pressed, other settings have to be right for the mode to
actually be active. The indicator above the button will turn green when digital mode is in
fact active. These settings are as follows:
• The pitch control must be at zero (i.e. centred).
• The pitch LFO depth must be zero.
If delay inertia is active, digital mode will also be inactive for a while around delay time
changes, while the delay times settle down.
It's worth noting that CPU load is fairly dramatically reduced in digital mode.
Also note that if you want a totally clean loop, you should also set the filter to 'Thru' and
turn off the saturation. NB setting the saturation knob to zero is not the same as turning it
off (by pressing the button).