Yamaha P 155 Instruction Manual

							Detailed Settings – [FUNCTION]
P-155 Owner’s Manual
ENGLISH
41
F2.2: Base Note
If you select a scale other than Equal Temperament, you 
need to specify the root. (You can also specify the root 
note with Equal Temperament selected, but it will have 
no effect. The base note setting is effective for tunings 
other than the Equal Temperament tuning.)
Setting range: C, C#, D, E b, E,  F, F #, G,  Ab, A,  Bb, B
Default setting: C
•R oot indication example
You can set various parameters for Dual 
(page 17) to optimize the settings for the 
songs you play, such as adjusting the volume 
balance between two voices.
Dual function settings are set individually for 
each voice combination.
If Dual is not engaged,   will appear 
instead of   and you will be unable to 
select the Dual functions. If this happens, press 
two voice buttons at the same time to engage 
Dual.
F3.1: Dual Balance
Setting range:  0–20 (A setting of “10” produces an 
equal balance between the two Dual 
voices. Settings below “10” increase 
the volume of Voice 2 in relation to 
Vo ice 1, and settings above “10” 
increase the volume of Voice 1 in 
re lation to Voice 2.)
Default setting:  Different for each voice combina-
tion.
Y ou can set one voice as the main voice, and another 
voic e as a softer, mixed voice.
F3.2: Dual Detune
Setting range:  -20–0–20 (With positive values, the 
pitch of Voice 1 is raised and the 
pitch of Voice 2 is lowered. With neg-
ative values, the pitch of Voice 1 is 
lowered and the pitch of Voice 2 is 
raised.)
Default setting:  Different for each voice combina-
tion.
Detune Voice 1 and Voice 2 for Dual to create a thicker 
sound.
F3.3: Voice 1 Octave Shift
F3.4: Voice 2 Octave Shift
Setting range:  –1, 0, 1
Default setting:  Different for each voice combina-
tion.
Y ou can shift the pitch up and down in octave steps for 
Vo ice 1 and Voice 2 independently. Depending on which 
vo ices you combine in Dual, the combination may sound 
better if one of the voices is shifted up or down an octave.
F3.5: Voice 1 Effect Depth
F3.6: Voice 2 Effect Depth
Setting range:  0–20
Default setting:  Different for each voice combina-
tion.
These functions make it possible to individually set the 
depth of the effect for Voices 1 and 2 for Dual. (The effect 
depth settings cannot be changed unless the 
[EFFECT] is 
ON. Function must be exited before the 
[EFFECT]  can be 
turned ON.)
•“ Voice 1” and “Voice 2” are explained on page 17.
F3.7: Reset
This function resets all D ual functions to their default 
values. Press the 
[+/YES] button to reset the values.
F3. Dual Functions
F ollowed by 
a high bar if sharp F
ollowed by 
a low bar if flat
(F
#) (G)
(Ab)
The available setting range is wider in the lower range (± 60 cents \
for A-1), and narrower in the higher range (± 5 cents for C7). (100 
cents equal one semitone.)
SHORTCUT: 
Y ou can jump directly to the Dual functions   by pressing the 
[TEMPO/FUNCTION]  button while holding the two Dual voice but-
tons.
NOTE
NOTE 
						

							Detailed Settings – [FUNCTION]
P-155 Owner’s Manual
ENGLISH
42
This menu enables you to make various 
detailed settings for Split.
By changing the split point or other setting, 
you can optimize the settings for the songs 
you play.
Be sure to select the Split by pressing the 
[SPLIT] button before engaging Function.
If Split is not engaged,   will appear 
instead of   and you will be unable to 
select the Split functions. Also note that you 
must exit Function before you can engage 
Split.
F4.1: Split Point
Setting range:The entire keyboard
Default setting: F#2
Set the point on the keyboard that separates the right and 
left-hand sections (split point). The pressed key is 
included in the left-hand range.
•I nstead of pressing the 
[–/NO] [+/YES] buttons, you 
can engage the split point by pressing the appropriate 
ke y on the keyboard.
•E xample key name indications for Split Point:
F4.2: Split Balance
Setting range:  0–20 (A setting of “10” produces an 
equal balance between the two Split 
voices. Settings below “10” increase 
the volume of the left voice in rela-
tion to the right voice, and settings 
above “10” increase the volume of 
the right voice in relation to the left 
voic e.)
Default setting:  Different for each voice combina-
tion.
The volume level of the two voices combined in Split can 
be adjusted as required. You can make this setting for 
each combination of voices individually.
F4.3: Right Voice Octave Shift
F4.4: Left Voice Octave Shift
Setting range:  –1, 0, 1
Default setting:  Different for each voice combination
Y ou can shift the pitch up and down in octave steps for 
the Right Voice and Left Voice independently. Make a set-
ting depending on the note range of the songs you play. 
Y ou can make this setting for each combination of voices 
individually.
F4.5: Right Voice Effect Depth
F4.6: Left Voice Effect Depth
Setting range:  0–20
Default setting:  Different for each voice combination
These functions make it possible to individually set the 
depth of the effect for the left and right Split voices.
The effect depth settings cannot be changed unless the 
[EFFECT] is ON. You must exit Function before you can 
turn on an 
[EFFECT].
Y ou can make this setting for each combination of voices 
individually.
F4.7: Sustain Pedal Range
Setting range:  ALL (for both voices) 
1 (for the right Voice) 
2 (for the left Voice) 
Default setting:  1 (for the right Voice)
The Sustain Pedal Range function determines whether 
the sustain pedal affects the right voice, the left voice, or 
both the left and right voices in Split.
F4.8: Reset
This function resets all Split functions to their default 
values. Press the 
[+/YES] button to reset the values.
F4. Split Functions
F ollowed by 
a high bar if sharp F
ollowed by 
a low bar if flat
(F
#2) (G2)
(A b2) 
						

							Detailed Settings – [FUNCTION]
P-155 Owner’s Manual
ENGLISH
43
This section provides a variety of other func-
tions, including letting you assign the opera-
tion of the AUX pedal to one of several 
settings, and allowing you to select specific 
song channels for playback.
F5.1: AUX Pedal
Setting range:
1. Soft PedalThe soft pedal reduces the volume and slightly 
changes the timbre of notes played while the pedal is 
pressed. The soft pedal will not affect notes that are 
already playing.
2. Sostenuto pedal If you play a note or chord on the keyboard and press 
the pedal while the note(s) are held, those notes will 
be sustained for as long as the pedal is held (as if the 
sustain pedal had been pressed) but all notes played 
thereafter will not be sustained. This makes it possible 
to  sustain a chord, for example, while other notes are 
played “staccato.”
3. Expression This setting allows control of dynamics during perfor-
mance.
4. Song Play/Pause This setting allows you to start or pause song play-
back. In this setting, the AUX Pedal functions in the 
same manner as the 
[PLAY/PAUSE] button on the 
panel.
Default setting:  1 (Soft Pedal)
F5.2: Soft Pedal Effect Depth
Setting range: 1–5
Default setting:  3
This function sets the depth of the soft pedal effect.
F5.3: Sustain Sample Depth
Setting range:  0–20
Default setting:  12
The 
GRAND PIANO 1 voice features special “Sustain 
Samples” that recreate the unique resonance of an acous-
tic grand piano’s soundboard and strings when the sus-
tain pedal is pressed. This function lets you adjust the 
depth of this effect.
F5.4: Keyoff Sample Volume
Setting range:  0–20
Default setting:  10
Y ou can adjust the volume of the keyoff sound (the sub-
tle sound produced when the keys are released) for voices 
[GRAND PIANO 1], [HARPSICHORD], [E.CLAVI-
CHORD]
.
F5.5: Song Channel Selection
Setting range:  ALL, 1&2
Default setting:  ALL
The setting here only affects External songs. You can 
specify which song channels will play back on this instru-
ment. When “ALL” is selected, channels 1–16 will be 
played back. When “1&2” is selected, only channels 1 and 
2 will be played back, while channels 3–16 will be trans-
mitted via MIDI.
F5.6: SUSTAIN PEDAL Type
F5.7: AUX PEDAL Type
Setting range:  1, 2
Default setting:  1
Depending upon the pedal that is connected to the SUS-
T AIN PEDAL jack or AUX PEDAL jack, the effect pro-
duced by operating the pedal (ON/OFF, dynamics, etc.) 
might be reversed.
If  this happens, you can use this setting to correct the 
pedal operation. The setting range is from 1 to 2.
Pr ess the 
[–/NO] and [+/YES] buttons simultaneously to 
re call the default setting of “1.”
F5.8: Damper Resonance Effect ON/OFF
Setting range:  ON/OFF
Default setting:  ON
F5.9: Damper Resonance Effect Depth
Setting range:  0–20
Default setting:  5
The Damper Resonance lets you apply a simulation of 
the sustain sound of the damper pedal on a grand piano, 
as you press the damper pedal and play the keyboard. 
This effect is applied to the voice you play on the key-
board and the part (channels 1 & 2).
F5. Other Functions
Organ, string and choir voices will continue to sound for as long 
as the sostenuto pedal is depressed.
NOTE
• Make sure that the power is switched OFF when connecting or 
disconnecting the pedal.
• If the SUSTAIN PEDAL type is set to “2”, disconnecting the sustain 
pedal while the power is switched on may leave the sustain active, 
causing notes to sustain indefinitely. In this case, switch the power 
off, then back on.
NOTE 
						

							Detailed Settings – [FUNCTION]
P-155 Owner’s Manual
ENGLISH
44
Use this function to adjust the metronome vol-
ume. 
Setting range: 1–20
Default setting:  10
You can make detailed adjustments to the 
MIDI settings. 
For more information about MIDI, see the 
“About MIDI” section (page 48).
F7.1: MIDI Transmit Channel Selection
In  any MIDI control setup, the MIDI channels of the 
tr ansmitting and receiving devices must be matched for 
proper data transfer.
This parameter enables you to specify the channel on 
which the instrument transmits MIDI data.
Setting range:  1–16, OFF (not transmitted)
Default setting:  1
F7.2: MIDI Receive Channel Selection
In any MIDI control setup, the MIDI channels of the 
tr ansmitting and receiving devices must be matched for 
proper data transfer. This parameter enables you to spec-
ify the channel on which the instrument receives MIDI 
data.
Setting range:  ALL, 1&2, 1–16
Default setting: ALL
F7.3: Local Control ON/OFF
“Local Control” refers to the fact that, normally, the 
instrument keyboard controls its internal tone generator, 
allowing the internal voices to be played directly from the 
keyboard. This situation is “Local Control On,” since the 
internal tone generator is controlled locally by its own 
keyboard.
Local control can be turned OFF, however, so that the 
ke yboard does not play the internal voices, but the 
appropriate MIDI information is still transmitted via the 
MIDI OUT terminal when notes are played on the key-
board. At the same time, the internal tone generator 
r esponds to MIDI information received via the MIDI IN 
te rminal.
Setting range:  ON/OFF
Default setting:  ON
F7.4: Program Change ON/OFF
Normally the instrument will respond to MIDI program 
c hange numbers received from an external keyboard or 
other MIDI device, causing the correspondingly num-
bered voice to be selected on the corresponding channel 
(the keyboard voice does not change). The instrument 
wi ll normally also send a MIDI program change number 
whenever one of its voices is selected, causing the corre-
spondingly numbered voice or program to be selected on 
the external MIDI device if the device is set up to receive 
and respond to MIDI program change numbers.
This function makes it possible to cancel program 
c hange number reception and transmission so that 
vo ices can be selected on the instrument without affect-
ing the external MIDI device.
Setting range:  ON/OFF
Default setting:  ON
F6. Metronome Volume
SHORTCUT: 
You can jump directly to the metronome functions   by press-
ing the  [TEMPO/FUNCTION]  button while holding the  [METRO-
NOME]  button.
F7. MIDI Functions
•In Dual, Voice 1 data is transmitted on its specified channel. In 
Split, right voice data is transmitted on its specified channel. In 
Dual, Voice 2 data is transmitted on the next greater channel num-
ber relative to the specified channel. In Split, left voice data is 
transmitted on the next greater channel number relative to the 
specified channel. In either case, no data is transmitted if the 
transmit channel is set to “OFF.”
• Song data is not transmitted via the MIDI connections. However, 
channels 3–16 of External songs will be transmitted via the MIDI 
connections depending on the Song Channel Selection setting 
(page 43).
NOTE
NOTE
• ALL:
“Multi-timbre” Receive. This allows simultaneous reception of dif-
ferent parts on all 16 MIDI channels, enabling the instrument to 
play multi-channel song data received from a music computer or 
sequencer.
1&2:
“1&2” Receive. This allows simultaneous reception on channels 1 
and 2 only, enabling the instrument to play 1 and 2 channel song 
data received from a music computer or sequencer.
•P rogram change and other like channel messages received will 
not affect the instrument’s panel settings or the notes you play on 
the keyboard.
For information on program change numbers for each of the instru-
ment’s voices, refer to MIDI Data Format page 62.
NOTE
NOTE 
						

							Detailed Settings – [FUNCTION]
P-155 Owner’s Manual
ENGLISH
45
F7.5: Control Change ON/OFF
Normally the instrument will respond to MIDI control 
c hange data received from an external MIDI device or 
ke yboard, causing the voice on the corresponding chan-
nel to be affected by pedal and other “control” settings 
re ce ived from the controlling device (the keyboard voice 
is not affected).
The instrument also transmits MIDI control change 
information when the pedal or other appropriate con-
tr ols are operated.
This function makes it possible to cancel control change 
data reception and transmission so that, for example, the 
instrument’s pedal and other controls can be operated 
w ithout affecting an external MIDI device.
Setting range:  ON/OFF
Default setting:  ON
F7.6: Panel/Status Transmit
This function causes all the current instrument panel set-
tings (selected voice, etc.) to be transmitted via the MIDI 
OUT terminal. 
1. Set up the panel controls as desired.
2. Connect the instrument to a sequencer via MIDI, and 
set up the sequencer so it can receive the setup data.
3. Engage the Function and select  .
4. Press the 
[+/YES] button to transmit the panel/status 
data.
 wi ll appear on the display when the data has been 
successfully transmitted.
F7.7: Initial Setup Send
This function lets you send the data of the panel settings 
to  a computer. By transmitting the panel settings and 
re co rding them on the MIDI sequence recorder prior to 
the actual performance data, the instrument will be 
automatically restored to the same settings when the per-
formance is played back. You can also use this function to 
c hange the settings of a connected tone generator to the 
same settings as the instrument.
1. Set up the panel controls as desired.
2. Connect the instrument to a sequencer via MIDI, and  set up the sequencer so it can receive the setup data.
3. Engage the Function and select  .
4. Press the 
[+/YES] button to transmit the panel/status 
data.
 wi ll appear on the display when the data has been 
successfully transmitted.
The following data can be sent.
•Voice  selection
• [REVERB] type
• [REVERB] depth
• [EFFECT] type
• [EFFECT] depth
• Split point
•T uning (F1)
•D ual detune (F3.2)
For information on control changes that can be used with the instru-
ment, refer to MIDI Data Format on page 62.
Setup Data:
Data that contains a set of panel settings for the instrument.
•See page 63 for a list of the Panel Data Contents transmitted by 
this function.
• Receiving the transmitted data:
1. Connect the instrument via MIDI to the device to which the 
setup data was transmitted previously.
2. Start sending the setup data from the device.
The instrument automatically receives the setup data, which will 
be reflected in the panel settings.
(For the data to be accepted, the instrument that receives the 
setup data should be the same model as the one that transmitted 
the setup data to the sequencer.)
• For more information on transmitting and receiving setup data via 
MIDI, refer to the owner’s manual for the connected MIDI device.
NOTE
NOTE
NOTE 
						

							Detailed Settings – [FUNCTION]
P-155 Owner’s Manual
ENGLISH
46
You can back up some settings, such as voice 
selection and reverb type, so that they will not 
be lost when you turn off the power to the 
instrument. If the backup function is turned 
on, the settings at power off are effective. If 
the backup function is turned off, the settings 
in memory are erased when you turn off the 
power. In this case, when you turn on the 
power to the unit, the default settings (the ini-
tial settings) will be used. (The factory setting 
default list is found on page 61.)
However, the backup settings themselves, the 
contents of the user song recorder memory, 
and character code setting are always backed 
up. Refer to “Data Backup Using a Computer” 
on page 52.
Y ou can turn the backup function on or off for 
each function group. Different Backup Groups 
are provided for the different function catego-
ries of the instrument: Voice, MIDI, Tuning and 
Others.
F8.1: Voice
Setting range:  ON/OFF
Default setting:  OFF
•V oice (Keyboard, Dual, and Split)
•D ual (ON/OFF, Voice, and Dual Functions for each 
vo ice combination)
• Split (ON/OFF, Voice, and Split Functions for each 
voice combination)
•R everb (ON/OFF, Type, and Depth for each voice)
• Effect (ON/OFF, Type, and Depth for each voice)
•T ouch Sensitivity (including the FIXED volume)
•M etronome Beat, Volume (  settings)
F8.2: MIDI
Setting range:  ON/OFF
Default setting:  ON
The MIDI functions (  settings)
(expect for  )
F8.3: Tuning
Setting range:  ON/OFF
Default setting:  ON
•T ranspose 
•T uning (  settings)
• Scale (including base note) (  settings)
F8.4: Others
Setting range:  ON/OFF
Default setting:  ON
•O ther functions (  settings)
• BRILLIANCE setting
F8.5: Character Code
If the song cannot be loaded, you may need to change the 
c haracter code setting.
Setting range:  Int (English)/JA (Japanese)
Default setting:  Int (English)
F8. Backup Functions
Factory Preset Recall
All settings affected by the Functions (F1–F8) can be 
r estored to their original factory preset values by 
turning the 
[STANDBY/ON] switch ON while hold-
ing the C7 key (right-most-key on the keyboard). 
This operation also erases all user song data. The fac-
to ry  preset values are listed on page 61.
CAUTION
After turning the  [STANDBY/ON] switch ON while 
holding the C7 key (right-most-key on the key-
board), “ CLr” appears in the display. Never attempt 
to turn off the power while “ CLr” appears in the dis-
play. Turning the power off in this state may cause 
the system to freeze. 
						

							Connections
P-155 Owner’s Manual
ENGLISH
47
Connections
Connectors
CAUTION
Before connecting the instrument to other electronic components, turn of\
f the power to all the components. Before turn-
ing the power on or off to all components, set all volume levels to mini\
mum (0). Otherwise, electrical shock or damage to 
the components may result.
1 USB [TO DEVICE] terminal
This terminal allows connection to USB storage devices.
Refer to “Connecting to a USB storage device” on page 49.
2 AUX OUT [L/L+R] [R] jacks
These jacks let you connect the instrument to external powered speaker systems, 
for playing in larger venues at higher volumes.
CAUTION
When the instrument’s AUX OUT jacks are connected to an external system, first turn on the\
 
power to the instrument, then to the external system. Reverse this order\
 when you turn the 
power off.
34
15 2
Use audio cables and adaptor 
plugs with zero resistance.
If you want to take a mono signal 
via the AUX OUT jack, connect a 
cable to the [L/L+R] jack.
NOTE
NOTE
Instrument
The instrument’s [MASTER VOLUME] setting will affect 
the sound that is output from the AUX OUT jacks. Po
wered speaker
A UX OUT
Phone plug (standard) A
UX IN
Phone plug 
(standard)
Cable 
						

							Connections
P-155 Owner’s Manual
ENGLISH
48
3MIDI [IN] [OUT] terminals
Use MIDI cables to connect external MIDI devices to these connectors.
MIDI [IN]: Receives MIDI data.
MIDI [OUT]: Transmits MIDI data.
Re fer to the “Connecting a Personal Computer” on page 50.
4 SUSTAIN PEDAL Jack
This jack is for connecting an included foot switch FC4 here. An optional FC3 foot 
pedal or FC5 foot switch can also be connected to this jack.
CAUTION
Make sure that power is OFF when connecting or disconnecting the pedal.
Do not turn on the power to the unit while pressing the foot switch or f\
oot pedal. Otherwise, 
the switch or pedal type (on/off) will be reversed.
5AUX PEDAL Jack
This jack is for connecting an optional FC3 foot pedal,  FC5 foot switch or FC7 
foot controller. An included foot switch FC4 can also be connected to this jack.
A wide range of functions such as the Soft Pedal function, etc. can be assigned to 
this jack. Use the Function settings to assign the function. (page 43)
CAUTION
Make sure that power is OFF when connecting or disconnecting the pedal.
Do not turn on the power to the unit while pressing the foot switch, foo\
t pedal, or foot con-
troller. Otherwise, the switch or pedal type (on/off) will be reversed.
Since MIDI data that can be 
transmitted or received varies 
depending on the type of MIDI 
device, check the “MIDI Imple-
mentation Chart” to find out what 
MIDI data and commands your 
devices can transmit or receive. 
The instrument’s MIDI Implemen-
tation Chart appears on page 66.
NOTE
About MIDI
MIDI (Musical Instrument Digital Interface) is a standard format for data transmission/
rece ption. It enables the transfer of performance data and commands between MIDI 
devices and personal computers. Using MIDI, you can control a connected MIDI device 
from the instrument, or control the instrument from a connected MIDI device or com-
puter.
Depending upon the pedal that is 
connected to the SUSTAIN 
PEDAL jack, the effect produced 
by operating the pedal (ON/OFF, 
dynamics, etc.) might be 
r eversed. If this happens, refer to 
the “SUSTAIN PEDAL Type” sec-
tion (page 43).
NOTE
FC4
Depending upon the pedal that is 
connected to the AUX PEDAL 
jack, the effect produced by oper-
ating the pedal (ON/OFF, dynam-
ics, etc.) might be reversed. If this 
happens, refer to the “AUX 
PEDAL Type” section (page 43).
NOTE
FC5 
						

							Connections
P-155 Owner’s Manual
ENGLISH
49
Connecting to a USB storage device
To connect to a USB storage device, be sure to read the section “Precau\
tions when using the USB 
[TO DEVICE] terminal” on page 53.
To  display the data in the USB storage device
To vi ew the data of the USB storage device on the display, press the [SONG SELECT] button a 
few times until the “USB” indicator lights. If the “USB” indicator is lit before connecting the 
USB storage device, press the 
[EXIT] button to exit from “USB” and re-engage “USB.”
Backing up your data to a computer
■ Backing up the instrument data to a computer
Once you’ve saved data to a USB storage device, you can copy the data to the hard disk of your computer, then archive 
and organize the files as desired. Simply reconnect the device as shown below.
■Copying files from a computer hard disk to a USB storage device
Files contained on the hard disk of a computer can be transferred to the instrument by first copying them to the stor-
age media, then connecting/inserting the media to the instrument. 
Not only files created on the instrument itself but also Standard MIDI files created on other devices can be copied to a 
USB storage device from the hard disk of the computer. Once you’ve copied the data, connect the device to the USB 
[TO DEVICE] terminal of the instrument, and play back the data on the instrument.
Saves internal data to a USB storage device.
Instrument USB [TO DEVICE] terminal
USB storage device
Disconnect the USB storage device from the instrument and connect it to the computer.
Backing up data to a computer and organizing files/folders.
Computer USB storage device
Copying the files of the hard disk of the computer to the USB storage device.
Disconnect the USB storage device from the computer and connect it to the instrument. Reading files on the USB storage device from the instrument.Computer
USB storage device Instrument
USB [TO DEVICE] terminal USB storage device 
						

							Connections
P-155 Owner’s Manual
ENGLISH
50
Connecting a Personal Computer
By connecting a computer to the MIDI terminals, you can transfer data be\
tween the instrument 
and the computer via MIDI. To do this, install the USB MIDI interface driver and Musicsoft Down-
loader software.
There are two ways you can connect the instrument to a computer:
1. Connecting the USB port on the computer to the instrument via a USB MIDI interface.
2. Using a MIDI interface and the instrument’s MIDI terminals.
For more  information, see below.
CAUTION
When connecting the instrument to a computer, first turn off the power to both the instrument 
and the computer before connecting any cables. After making connections,\
 turn on the power to 
the computer first, then to the instrument.
Connecting the USB port on the computer to the 
instrument via a USB MIDI interface
U se a USB MIDI interface device to connect the USB port on your computer to the 
instrument’s MIDI terminals.
Using a MIDI interface and the instrument’s MIDI 
terminals
U se a MIDI interface device to connect a computer to the instrument using MIDI 
cables.
Optional USB MIDI interface
UX16
TERMINOLOGY
Driver:
A driver is software that provides 
a data-transfer interface between 
the computer’s operating system 
and a connected hardware 
device.
Y ou can download the USB MIDI 
interface driver and Musicsoft 
Downloader (MSD). Please check 
the following URL for the latest 
version.
http://music.yamaha.com/
download/
NOTE
NOTE
For information on setting up your 
sequence software, refer to the 
owner’s manual of the relevant 
software. 
NOTE
Instrument
Computer
USB terminal
USB MIDI  interface
MIDI [IN]
terminal MIDI [OUT] 
terminal
USB port or serial port 
(modem or printer terminal)
Computer
MIDI 
interface
MIDI cable
MIDI [IN] terminal
MIDI [OUT] 
terminal
Instrument