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v1.0.0

10. COARSE TUNE Knob (Outer)

Base tuning of the oscillator with coarse resolution.  Offset control.

11. TUNE Attenuverter

Fully featured attenuverter with 3-way polarity selection switch: bipolar, unipolar positive, or unipolar
negative with gain ranges -1 to +1,  0 to +1,  or 0 to -1, respectively.

An attenuverter is a circuit that adjusts how much (the gain) of the incoming CV signal is applied to
the target circuit.  The polarity switches above the knobs control the gain range of the knob.  When
the switch is fully left, the knob will adjust the gain of the incoming CV from -1 to +1 with 0 gain when
the knob is at noon.  When the switch is in the centre, the knob adjust the gain from 0 to +1 and when
the switch is fully right, the knob adjusts the gain from 0 to -1.  Keep in mind that in the bipolar
position a human will be unable to perfectly zero out the control entirely - for achieving perfect zero,
use one of the unipolar options (centre or right switch position) and turn the knob fully CCW.

There is a panel hint to tell which attenuverter corresponds to which parameter.  If the attenuverter
has a small gold arc underneath, it corresponds to the outer knob of a dual-concentric stack.  No arc
means it corresponds to the inner knob of the dual concentric stack.

12. PITCH DECAY LENGTH Knob
(Inner)

Adjust the length of the pitch decay envelope.
Offset control.

13. PITCH DECAY AMOUNT Knob
(Outer)

Adjust the amount of the pitch decay envelope
that affects pitch of the oscillator.  Offset
control.

14. PITCH DECAY AMOUNT
Attenuverter

15. PITCH DECAY ENVELOPE
SHAPE Switch

This switch chooses the shape of the pitch decay envelope.  Left = Rabid Elephant, Right = Classic.
Note: the graphic is not representative of the nuances that differ the shapes.  The classic shape is
*not* linear.  The Rabid Elephant shape is novel and has been fine tuned 100s of times over the
course of 4 years!  It is like an exponential decay but more knee’d.  This shape was actually derived
from Natural Gate’s custom envelopes as a starting point.

Summary of Contents for Portal Drum

Page 1: ...v1 0 0 PORTAL DRUM USER S MANUAL...

Page 2: ...ours and pushes frequency content to the edges providing a huge array of drum tones The Portal Drum is the first instrument of ours to feature the DynaControl system This gives the user a way to macro...

Page 3: ...we do out of love and the hopes that people create and spread their own liteness with the world You are a patron to this cause and to us Thank You Yoni While we ve only met just a short time ago we h...

Page 4: ...ds 1V This jack also has a little trick when you leave the DynaControl input unplugged Because we have S H circuits and attenuverters on every input you can create a single cable HIT dynamics input if...

Page 5: ...entation too 4 AMP DECAY CV Input Jack This input allows for external voltage control over the AMP DECAY time It is summed with the AMP DECAY knob setting 5 DRIVE CV Input Jack CV control over the dri...

Page 6: ...one of the unipolar options centre or right switch position and turn the knob fully CCW There is a panel hint to tell which attenuverter corresponds to which parameter If the attenuverter has a small...

Page 7: ...on clipping Offset control 20 AMP DECAY Knob Outer This adjusts the decay time of the drum s amplitude Offset control 21 PILLOW PUNCH Switch This switch chooses the type of drum pillow or punch In Pun...

Page 8: ...or canyon in the mid frequencies SPAN is how wide the gap is The more Span the more mids are cut out of the signal s spectrum We have added a very slight amount of overlap at the minimum settings of S...

Page 9: ...h this macro is applied to each target parameter Take a kick drum for example It it operated only by a foot The only variable other than the rhythm the human gets to choose is force But force doesn t...

Page 10: ...understand the role of your drum in context When creating Portal Drum we always placed the kick sounds in a particular song Be very careful with any heft bias where the cool super powerful sounding k...

Page 11: ...unlinked which can give useful filter overlaps for not only cutting frequencies but also boosting some You may want to keep this in mind as you move the controls around If you move the LPF cutoff fre...

Page 12: ...o IO safety and damage See our Warranty section for responsibilities Patch carefully Any specifications are subject to change without notice Calibration Warranty and Repair Calibration Rabid Elephant...

Page 13: ...our products do not end up in a landfill We will not in discretionarily discard replace the instrument or subassemblies of the module If your instrument is damaged please contact us at support rabide...

Page 14: ...is is constant that multiplies the signal In other words it scales the incoming signal by some constant Gain values less than 1 attenuate or shrink the signal in the up and down dimension Gains above...

Page 15: ...n of the following parameters HIT Button In Meow Amount CV In 1V oct In FM Decay CV In Transient Amount CV In Transient Tone CV In HPF 1V oct In GAP Position CV In Direct Sin VCO Out Direct Tri VCO Ou...

Page 16: ...v1 0 0 Spread your creativity kindness and vibe with the world With love Rabid Elephant...

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