Bastl grandPA Manual
G
granular sampler
TRIG A
CV IN
OUT
TRIG B
rate
crush
R
start
end
W
grain
speed
attack
release
B
M
I
C
R
O
S
D
PAGE
DOWN
P
R
E
S
E
T
UP
FN
LOOP
SAVE
SYNC
CV
grandPA
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Display shows the name of the sample and graphically
displays the value of a parameter when changed by
the knobs. When the dot is lit in this representation it
indicates important setting: for instance the original
sample rate or static grain speed.
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The function of the knobs depends on the color of RGB
LED. For each channel A and B, all the parameters can
be set independently. The last triggered channel will
be affected by the changes. The PAGE button changes
the color of the RGB LED to indicate the functions of
the knobs:
RED: sample rate / crush
GREEN: grain size / shift speed
BLUE: attack / release
WHITE: start / end
Grandpa is a granular mono sampler for Eurorack modu-
lar synthesizers.
Grandpa reads samples from a microSD card, accessible
from the front panel and runs the same sound core as the
microGranny 2. For each sample you can adjust: sample
rate, crush, grain size, shift speed, attack, release (full
release is hold), start and end position. There are two dif-
ferent samples with all their settings that can be triggered
but only one of them can play at once.
There are 6 buttons, 2 knobs and several LEDs to set the
parameters.
instruction
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Holding the function (FN) button while pressing
another button does the following:
FN > DOWN = SAVE (saves preset)
FN > UP = SYNC (activates or deactivates grain shifting
when sending trigger signals to the CV input)
FN > PAGE = LOOP (activates or deactivates looping of
the sample)
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CV input which is assignable to any sound parameter.
Holding the FN button and moving a knob (indicated
by a white flash) on a specific page, will assign the CV
input to control this sound parameter. the CV input can
also be assigned to trigger grain shifts - this is done by
activating the SYNC function.
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the microSD card should be formatted by the
standartdSDformater software. The files on the SD
card need to be in the root directory and have specific
names e.g.: P0.wav -P9.wav, PA.wav -PZ.wav etc. The
first letter of the name has to be a capital P and second
letter 0-9 or A-Z (also capital).
Samples have to be 22050hz, 16bit, mono wav files.
(they can also be 44.1khz, but the sample rate will not
allow pitch up then).
You can remove the card from the device without
powering it off. When you put the card back in hold
the UP and DOWN buttons together for 2 seconds to
reboot.
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The SYNC and LOOP states are indicated by the two
LEDs, while the FN button is pressed. (those LEDs
normally indicate which sample is playing).
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The UP and DOWN buttons are used to select a sample
which is played back from the microSD card. (the name
is shown on the display). Pressing those buttons while
the PAGE button is pressed, changes the preset (the
display shows the preset's name). Presets consist of
the two loaded samples with all their settings.
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The TRIGGER A and TRIGGER B buttons are manually
triggering the sounds.
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The output is DC coupled in range 0-5V where 2.5V is
the silence in the sample. This enables you to use it as
a CV source, with specially prepared slow running wave
shapes stored as wav files.