9
Using the Raster
Ignore the
ALT controls (gray labels) until you are comfortable with the basic operation of the Raster 2.
For now, turn the
RATE and DEPTH controls all the way down (7:00) and SHIFT control to center (12:00).
Put all toggle switches in their center position.
The
BLEND, FDBK, and DELAY controls can be used as an 800 millisecond 3-knob delay.
Self Oscillation
The Raster's
DELAY and FDBK knobs are tuned for exploration of self-oscillation and feedback. Start
with
BLEND at center (12:00), FDBK at center (12:00), and DELAY at center (12:00). Reduce the DELAY
time until you hear a hollow, resonant sound, then play with the
FDBK and DELAY controls
The
FDBK control is scaled for infinite feedback at 3:00 (∞) and greater than unity gain above that. The
feedback signal can get very loud, so
use caution and protect your hearing.
Digital Delay Tricks
Unlike analog delay pedals, the Raster 2 does not change the pitch as you turn the
DELAY knob. Fast
knob movements jump smoothly to the new delay time. Slow knob movements gradually change the
delay time, with the Raster analyzing the signal to minimize glitches.
Start with
BLEND at center (12:00), FDBK at minimum (7:00), and DELAY at center (12:00). Play staccato
notes or a drum loop.
Quickly turn the
DELAY knob to the maximum, pause, then turn it back to the middle. Then slowly turn
it between the minimum and maximum positions. Increasing the delay time will drag the audio, creat-
ing time stretch effects. Reducing the delay time will compress the signal, skipping slices of audio. By
experimenting with the speed and range of knob movements with different signals, you can get a range
of time stretching and glitchy stutter effects.
Now, adjust the
DELAY knob for quarter note repeats. Increase FDBK to about 10:30 so the repeats
quickly fade out. While playing a steady rhythm (or drum loop), Move the delay range (right top) toggle
switch between the three positions. The delay time jumps between 8th notes, quarter notes, and half
notes, creating smooth rhythmic changes with no pitch shift.
Web Editor
We provide a web-based editor to configure your Context, access hidden parameters, and fine-tune pre-
sets. See "Web Editor (beta)" on page 25 for more information.. It requires the Google Chrome brows-
er, and can be accessed at
https://www.redpandalab.com/content/apps/raster-editor/index.html
Note the "http
s" URL protocol. "http" will not allow Chrome to access MIDI devices