204 TASCAM GigaEditor 4 Manual
Downward Long – Control s the target lte r settings for the Downward Long Int erval as dened
by the ‘Downward Tuning Reference’ value.
e PRF/DEF lters were designed specica lly to address and emulat e the characteristics of sam ples whose
pitch and dynamics have been transposed. For this reason, this musically adapted lter does not behave like
a traditional EQ, with one paramet er eecting the next. Ex perimentation is encouraged. It might also be
helpful to use a Frequency Analy sis Plug-in at rst to get a feel for each lter parameter.
Fc – Determines the ini tial center frequ ency for the Q0 Quality factor.
Q0 – Simultaneously determines gain, Quality ( lter width) and a center frequency oset relative
to the initial Fc setting.
Q0H – is high frequency quality factor has a xed center frequency near 7.5 khz and is
especially helpful i n de-emphasizin g the harsh overt ones of upward ly transposed sam ples.
V0 – Initially designed to compensat e for any gain attenuation im posed by the lter, V0 ca n also
be used creatively t o increase the dy namic range of an instrument, achieving soer pianissimos and
bolder fortes.
Designing Filter Profiles
When designing lter pro les, it is best to set ALL f our lter parameters (Fc, Q0, Q0H, V0) for a si ngle
interval set before moving on to th e next interval set, i.e. once y ou select ‘Up Long’ you should finish
tweaking Fc, Q0, Q0 H, and V0 before selecting the ‘U p Short’ interva l.
For example, to adjust the ‘Up Short’ lter set parameters, rst select the ‘Up Short’ interval set.
Now trigger a note and bend that note upward by three semitones to hear what the current lter settings
sound like. Next, adjust Fc, Q0, Q0 H and V0 until the transposed n ote sounds as close as possibl e to the
non-transposed note. e goal is to adjust the ‘Up Short’ lter parameters until, for example, a note
transposed from C3 to D#3 sounds t he same as a non-transposed t riggered at D#3.
Note: Once a parameter has been modied, it is necessary to rst hit ‘Apply’, then retrigger the note before
the new settings will be audible.
Before Adjusting the ‘Up Long’ a nd ‘Down Long’ lter sets , make sure that you specify t he Upward and
Downward Tuning References on the main ‘Portamento Reshaping Filter’ Tab. e ‘Long’ lter sets
correspond directly to the number o f semitones s pecied by thes e tuning refere nces. For insta nce, if you set
the upward tuning reference to 12 semitones, the exact ‘Up Long’ lter settings will be applied to samples
that have been transposed upward by 12 semitones. Samples tran sposed upward to less than 12 semitones
(between 4 and 11 s emitones) will b e ltered by a composite of th e ‘Up Short’ and ‘Up Long’ lt er set
parameters (morphed).
Please see Chapter 9 on editing paramet ers in the Region Window for more specic details on adjusting region
specic values.