nootropic design Synthino User manual

Synthino
programmable digital synthesizer
● MIDI input - connect your favorite MIDI controller
● ¼” audio jack output
● Power with 9V battery or 9V center-positive adapter
with 2.1mm plug (not both at the same time, please)
●Volume thumbwheel on right side (clockwise to
increase)
● 12-bit DAC for true waveform synthesis -- not PWM like
those other microcontroller synthesizers!
● Programmable with Arduino IDE and C code
● 4-note polyphonic or it can be a high-quality monosynth
● ADSR envelope control (attack, decay, sustain, release)
● Low frequency oscillator (LFO)
● Endless possibilities for microcontroller-based audio
synthesis!

Use the WAVEFORM SELECT and envelope control knobs to change the parameters for that button. Each
button can have its own waveform and envelope parameters.
The buttons also correspond to MIDI channels 1-4. The WAVEFORM and envelope control knobs will change
the parameters for the channel of the last button pressed. e.g. if the last button pressed was #2, then the
WAVEFORM and envelope control knobs changes the parameters for MIDI channel 2.
Synthino
Mode 1
Synthino has 3 modes, and mode 1 is default. Use the controls to effect the notes played on the attached
MIDI keyboard. The top row of knobs is envelope control.
The low frequency oscillator (LFO) has
FREQ and DEPTH control.
Use the WAVEFORM SELECT knob to
change the waveform or instrument
played. This program has 13 waveforms:
sine, triangle, saw, square, saw2, saw3,
piano, electric piano, electric organ,
cello, sax, oboe, and electric bass.
You can also use the buttons to play
notes and set parameters for MIDI
channels. Hold a button and use the
PITCH knob to select the pitch for that
button.

To change modes hold down button 1 while
powering on the device. You will hear a
number of beeps that indicates the current
mode. While holding the button, turn the
lower left pot (LFO FREQ) to change
modes. Release the button to select the
mode. The mode will be remembered next
time you power on the device.
Mode 2 has the same controls as mode 1,
but the device functions as a monosynth
with higher sound quality. Only one note
may be played at a time.
Synthino
Mode 2

Mode 3 has different controls. It allows you
to change the waveform used by the LFO.
This lets you produce some very interesting
oscillations!
Synthino
Mode 3

The pitch of the Synthino can be fine-tuned
to match your other instruments.
When powering on the device, hold down
the rightmost button. You will hear two
beeps, then the Synthino will play an A4
note (A above middle C, 440Hz). Turn the
PITCH knob until the note is tuned to your
liking and release the button. The Synthino
is now tuned, and will remember the tuning
even after the power is off.
Synthino
Fine Tuning
Procedure