OP–1 field guide

OP–1 

portable
synthesizer

user guide

ガイド

v.1.7.0

notice. read this first.

warnings and important notes

before connecting this unit to other devices, turn off the power to all units. this will help prevent malfunctions and/or damage to speakers or other devices. if you need to connect/disconnect wires during use, always make sure to connect the cable to the OP–1 field first.

never connect the 3.5 mm plugs going from the
OP–1 field's inputs or outputs to a microphone input with active phantom power. this could damage the
OP–1 field.

be sure to charge the unit using only 5V usb power, such as that from the usb ports of a computer, or by using a dedicated usb charger.

make sure to read the regulatory statements here.

to keep the battery healthy, the unit should be charged at least every 6 months. if not used for a long time, it may not charge again.

ambient working temperature:10°–35°C (50°–95°F)

ambient storage temperature:0°–35°C (32°–86°F)

clean the shell of the unit with a lightly damp cloth. let dry before usage.

caution

do not try to charge or use a unit with a seemingly damaged battery.

only a battery supplied by teenage engineering installed by qualified personnel should be used.

disposal of a battery into fire or a hot oven, or mechanically crushing or cutting of a battery, can result in an explosion.

leaving a battery in an extremely high temperature surrounding environment can result in an explosion or the leakage of flammable liquid or gas.

to prevent possible hearing damage, do not listen at high sound levels for long periods.

store small parts out of the reach of children and infants. if accidentally swallowed, contact an emergency medicine doctor immediately.

warranty and return policy

the OP–1 field is fully factory tested and comes with a 12 month (from purchase date) warranty. this does not include malfunction due to misuse of the device, such as being dropped, crushed or used in an application of inappropriate voltages to the device's connectors or improperly designed or executed modifications.

in particular, you are the sole responsible for damage caused by a charging method other than 5V usb power.

the warranty does not cover shipping charges. make sure to read the terms and conditions here.

index

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want to read more about

what's in the box

Check that the following items are included when you open the box

OP–1 field unit

user guide

dual velcro back fasteners

usb-c cable

back to index

midi reference

back to index

incoming midi messages.

message

channel

function

value

note on

1 - 16

play synth/drum note

velocity 1-127

note off

1 - 16

release note

-

pitch bend

1 - 16

synth pitch bend

0 - 16383

program change

1 - 16

load synth/drum slot

0–7 = synth slots 1–8
8–15 = drum slots 1–8

clock

-

sync input

-

start

-

start tape playback

-

continue

-

continue tape playback

-

stop

-

stop tape

-

song position

-

set sequencer position

-

incoming midi control change messages.

cc

channel

function

value

7

1 - 4 *

mixer volume

0 - 127

9

1 - 4 *

mixer mute

≥ 64 = muted

10

1 - 4 *

mixer pan

0 - 127

46

any

synth: parameter 1
drum: active key pitch

0 - 127

47

any

synth: parameter 2
drum: active key loop in

0 - 127

48

any

synth: parameter 3
drum: active key loop out

0 - 127

49

any

synth: parameter 4
drum: active key play mode

0 - 127

50

any

synth envelope: attack
drum envelope: attack

0 - 127

51

any

synth envelope: decay
drum envelope: gain

0 - 127

52

any

synth envelope: sustain
drum envelope: release

0 - 127

53

any

synth envelope: release
drum envelope: smooth

0 - 127

54 - 57

any

patch fx parameters 1 - 4

0 - 127

58 - 61

any

patch lfo parameters 1 -4

0 - 127

62

any

randomize active patch

≥ 64

63

any

reset active patch

≥ 64

64

any

sustain pedal

≥ 64 = down

70 - 73

any

master fx parameters 1 - 4

0 - 127

74 - 77

any

master compressor parameters 1 - 4

0 - 127

78

any

tape record level

0 - 127

79

any

octave

< 64 = down, ≥ 64 = up

80

any

tempo

0–5 → 40–50 BPM, 6–120 → 52–166 BPM, 121–127 → 168–180 BPM

81

any

metronome level

0 - 127

82

any

tape: previous bar

≥ 64

83

any

tape: next bar

≥ 64

84

any

tape: jump to start

≥ 64

85

any

tape: jump to end

≥ 64

86

any

tape: set loop in

≥ 64

87

any

tape: set loop out

≥ 64

88

any

tape: toggle loop

≥ 64

90

any

master eq low

0 - 127

91

any

master eq mid

0 - 127

92

any

master eq high

0 - 127

93

any

mode select

< 64 = synth, ≥ 64 = drum

102

1 - 8 **

sound slot select

≥ 64

104

any

tape: stop

≥ 64

105

any

tape: play

≥ 64

123

any

all notes off

-

* channel 1 - 4 = track 1 - 4
** channel 1 - 8 = sound slot 1 - 8

* synth mode: synth engine params.
drum mode: active key pitch, loop in, loop out, play mode