Akai S6000 Operator's Manual page 164

EDIT SAMPLE
ZOOM IN/OUT
AUTO FIND
When trimming the end point of a looped sample, 15 sample points are required between the
loop end and the sample end.
The reason for this is because of the complex interpolation method used on the S5/6000 to
minimise transposition distortion.
If S5/6000 samples were only played at nominal pitch (i.e. the original note the sample was
recorded on), life would be easy and this restriction would not apply. However, because samples
need to be transposed up and/or down several octaves, in order to maintain high quality
interpolation and to preserve smooth loops during such transpositions, a 'headroom' of 15
samples is required. This is not a contravention of the de facto WAV standard (in fact, the S5/
6000 adheres to this very strictly) but due to the fact that the S5/6000's interpolation hardware
simply requires this 'overhead'
The S5/6000 takes this requirement into consideration automatically when setting either the
loop end or sample end and always leaves 15 samples between the LOOP END and SAMPLE
END. 3rd party Mac/PC sample editors may not., however, because the samples intended for
editing will either not be transposed or will use a much cruder form of transposition interpolation
where this 'overhead' is not required. Also, you may find that some S1000, S3000 and XL
samples (where the interpolation method is simpler) may exhibit some problems for the same
reasons.
In the case of using 3rd party Mac/PC sample editors, please do not trim the sample end too
close to the loop end when using such wave editors. In the case of existing S1000/S3000 and/
or XL sound library, you may need to re-loop the samples.
154
This allows you to view the right hand waveform display in greater detail
when trying to match waveforms.
Pressing this will cause the sampler to look for the best match point for
a loop. With simple waveforms, the results are almost guaranteed to be
perfect. However, with more complex waveforms, whilst you may get an
acceptable loop, it may still not be perfect and may exhibit some clicks
and thumps (in which case, use CROSSFADE to smooth them out
perhaps).
Repeated pressing of the AUTO FIND function moves the LOOP START
point nearer to the LOOP END point.
*** IMPORTANT NOTE ***
Sample Loop
S t a r t S t a r t
s5000 / s6000
Loop Sample
End End
15 samples
Version 1.21