User Manual

SA246 Aftershock Bass Distortion User’s Guide 34
level audio circuits, guitars/basses with active pickups, electronic keyboards, or mixer outputs. The
input circuit can handle signals ranging up to 5.6 Volts, peak-to-peak.
Can I power the Aftershock directly over USB, without using the 9 Volt supply?
No. USB provides 5 Volts, but the Aftershock needs 9 Volts, so the Aftershock cannot be powered
directly from USB. Make sure that you have plugged in the included 9V DC power supply when
connecting to the Aftershock’s USB port.
When connecting the Aftershock to a recording interface or mixer, should I used a Lo-Z
(microphone) or Hi-Z (line / instrument) input?
The Aftershock’s output will be low impedance when the effect is active or in buffered bypass mode,
but it will be high impedance when using true bypass mode and a guitar with passive pickups.
Therefore, it is recommended that you use a high impedance (Hi-Z) input on your recording interface
or mixer to avoid signal loss.
Why doesn’t the Aftershock respond to MIDI messages being sent to it?
By default, the Aftershock should respond to MIDI continuous controller messages on channel 1 (in
technical terms, this means that the lower 4 bits in the command byte of MIDI messages should be
0000 in binary or 0 in hexadecimal). The Aftershock’s MIDI channel can be configured using the
Neuro App. Channel numbers in MIDI use zero-based counting, so MIDI channel 1 is described as 0 in
hexadecimal, MIDI channel 2 is described as 1 in hexadecimal, and so on, concluding with MIDI
channel 16, which is described as F in hexadecimal. A continuous controller message starts with a
hexadecimal B and is followed by the channel number (0 through F). So, the command byte from
your MIDI controller should be formatted as shown in the following table:
MIDI Channel
(Decimal)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CC Command Byte
(Hex)
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
BA
BB
BC
BD
BE
BF
Each continuous controller command byte is followed by two bytes, the CC number and the value. So,
each CC message consists of a total of three bytes. If the Aftershock is not responding to MIDI, make
sure that your MIDI controller is properly configured and sending messages in the format described
above.
How do I enable extended effect types via MIDI?
Refer to the MIDI Learn section to map a MIDI continuous controller to the Effect Type switch. Then,
send a CC message with one of the following values to enable a certain effect type:
CC Value
Effect Type
0
Tube Drive
1
Smooth Tube
2
Power Stage
3
Crunch Tube
4
TS9000
5
Big Pi