Mute + Select
Pressing <Mute> first to enter the mute mode
and thereafter <Select> lets you change the filter
setting of digital filter. 6 options are available:
FIR, fast roll off, linear phase.
(Default)
PCM
filter with highest
stop
band
rejection
and
minimal ripple
FIR, slow roll off, linear phase.
IIR, fast roll off, minimum phase.
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