Vcf Block - Panda-Audio Future Impact v3 User Manual

The​ RESTART​ and ​ R ESET ​ m odes differ only in how they behave when a new trigger event
occurs before the envelope generator has completed its previous envelope sequence:
In ​ R ESTART​ mode the envelope will begin a new attack stage from ​ w hatever level ​ it was at
immediately before the note was played;
In ​ R ESET​ (or ​ R ESET-TO-ZERO​ ) mode the envelope will always start the new attack stage
from zero. So every note will have an identical attack.
It is important to note that the release stage of the ADSR generators can only be fully
exploited when the FI is played via MIDI. Since the pitch of a bass/guitar signal gets out of
tune at the moment the amplitude fall triggers the note-off phase, this effect must be
suppressed to avoid out-of-tune notes. This is done by ensuring that the actual release is the
shorter of ​ e ither ​ t he bass/guitar's own release ​ o r ​ t he ADSR release setting.

VCF Block

The Voltage Controlled Filter (VCF) is one of the most important sound-shaping tools in a
synthesizer. Basically it removes certain frequencies from a sound, thus altering its harmonic
content. Depending on the type of filter used, the frequencies ​ a bove ​ , ​ b elow ​ o r ​ a t ​ a specified
"cutoff" frequency are removed. This cutoff frequency can be modulated dynamically from
different sources (e.g. an envelope), thus creating sounds which evolve over time.
The FI has two filters which are connected in parallel. The first can be switched between
Lowpass, Highpass, Bandpass and Notch types. The second is Bandpass-only and its cutoff
can be offset from that of the first. The filters have both 12dB and 24dB per octave slopes
and two scaling modes.
The VCF Block is split into two sections in the editor:
1. VCF INPUT​ - A five-channel audio mixer which feeds into the filter.
2. FILTER​ - As described above.
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