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CHAPTER V:

VOICE PROGRAMMING EXAMPLE

In this section we’ll go through the steps in creating a fairly percussive electric piano voice from scratch. This simple

example should help you understand the programming process.

STEP 1:

Initialize a Voice

Enter the FUNCTION mode (press FUNCTION button) and call the MEMORY
PROTECT function. Turn MEMORY PROTECT OFF.

Call INIT VOICE function and press the YES button twice. This initializes the voice
and automatically enters the EDIT mode. Select the ALGORITHM select parameter.

If you now play a note you will hear a sine wave.

Selecting the Algorithm

STEP 2:

In this voice there are two distinct sound components: the main piano decay sound

and a percussive attack “ping.” For this purpose we’ll use algorithm 5, which has

two separate vertical “stacks” of two operators each.
The ALGORITHM parameter has already been called, so select algorithm 5 using
the DATA ENTRY controls.

STEP 3:

Turn Operators 3 and 4 OFF

We’ll start by programming the main piano sound using the left operator stack in

algorithm five—operators 1 and 2. Turn operators 3 and 4 OFF using the corre-
sponding OPERATOR/AMS ON-OFF buttons.

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Summary of Contents for DX27

Page 1: ...YAMAHA AUTHORIZED PRODUCT MANUAL ...

Page 2: ...YAMAHA DIGITAL PROGRAMMABLE ALGORITHM SYNTHESIZER OWNER S MANUAL ...

Page 3: ... owner s manual thoroughly while actually trying out all of the available functions CONTENTS CHAPTER 1 SETTlNG UP 3 1 Audio Outputs 3 2 Optional Foot Switch 3 3 Optional BC 1 Breath Controller 3 4 Headphones 3 5 MIDI Terminals 3 6 Cassette 3 7 AC Power Adaptor 3 8 Music Stand Installation 4 9 ID Function 4 CHAPTER II PLAYING THE DX27 6 1 DX27 Voice Memory Configuration 6 2 The INTERNAL PLAY Mode 7...

Page 4: ...qualified Yamaha service center When moving the instrument be sure to unplug the AC mains cord as well as all other connecting cables Avoid applying excessive force to switches and slide controls dropping or rough handling The DX27 is ruggedly constructed using reliable solid state circuitry nonetheless it is a fine instrument that should be treated with care Digital circuitry such as that used in...

Page 5: ...s MIDI data from the DX27 to other MIDI equipment The MIDI OUT terminal will normally be connected to the MIDI IN terminal of the receiving equipment The MIDI IN terminal receives MIDI data from external MIDI equipment such as a digital sequence recorder music computer or modular FM voice generator The DX27 s MIDI IN terminal will normally be connected to the MIDI OUT terminal of the transmitting ...

Page 6: ... the KEY SHIFT button while turning the power ON The current ID message will be displayed with a cursor over the first character The cursor can then be moved to any character position on the display by suc cessively pressing the KEY SHIFT button Choose the position to enter a new character then using the DATA ENTRY slider or buttons select the new character from the available character set Move th...

Page 7: ...DX27 CONNECTIONS 5 ...

Page 8: ...BANK memory 4 BANKS x 24 voices each The BANK memory incorporates four 24 voice BANKS A B C and D The BANK is most useful for storing groups of voices you have arranged for specific purposes The different banks may be programmed with different voice groups you need for different sets in a performance you can categorize your voices into BANKS i e piano type voices in one bank brass in another etc a...

Page 9: ...be played edited stored in another memory location or saved onto cassette NOTE The voices in the PRESET memory are numbered as follows each group of 96 voices the NORMAL group and the SHIFT group is further subdivided into four groups of 24 voices each 101 124 201 224 301 324 and 401 424 Thus you have NORMAL group voices 101 424 and SHIFT group voices 101 424 To access the 24 voice INTERNAL memory...

Page 10: ... A BANK D This will select the appropriate BANK and the 24 voices in that bank can be selected by pressing any of the DX27 s 24 voice buttons The SHIFT Mode By entering the DX27 SHIFT mode while in BANK PLAY the correspondingly numbered voice from the second group SHIFT group of preset voices will be selected Note that in the BANK PLAY mode this only applies to voices which have been stored in the...

Page 11: ...e Read Only Memory These voices can be loaded singly into the DX27 s selectable PRESET Memory 24 voice memory or into any location in the DX27 BANK memory THE 192 PRESET ROM VOICE NORMAL MODE VOICES The PRESET voice can also be accessed directly and played using the PRESET SEARCH function 9 ...

Page 12: ...01 124 201 224 301 324 and 401 424 from the NORMAL preset voice group In the SHIFT mode described in The BANK PLAY Mode above the correspondingly numbered voices from the SHIFT preset voice group are selected The 24 voices in each group are selected by pressing the corresponding voice selector After selecting PRESET SEARCH 101 124 for example the LCD will appear as follows F indicates that you are...

Page 13: ...ess the 1 button and the data is currently set at 0 Once the desired function has been selected its value can be altered using either 2 Entering Function the linear DATA ENTRY slider located to the left of the panel or the adjacent 1 1 Data buttons Moving the DATA ENTRY slider away from you increases the value of the selected parameter and moving the control towards you decreases the data value Pr...

Page 14: ...tion of wheel movement which can be useful in performance situations The data range is from 0 to 12 At 0 the pitch bend wheel is off Each increment between 1 and 12 represents a semitone i e the pitch variation between any white key and a black key immediately next to it Thus if this function is set to 12 maximum travel of the pitch bend wheel either above or below center position produces a one o...

Page 15: ... TIME This function sets the speed of the portamento effect The data range is from 0 to 99 At 0 portamento is off A setting of 99 produces the longest portamento effect Data can be entered using the DATA ENTRY slider and 1 1 buttons Once the PORTAMENTO TIME function has been called subsequent presses on the 16 PORTAMENTO TIME button will increment the data value 17 FOOT SWITCH ASSIGN This function...

Page 16: ... level of specified voice elements operators producing a range of tremolo or timbre modulation wah wah type effects This function is used to set the maximum depth of amplitude modulation that can be applied using the modulation wheel The actual effect produced depends on the settings of the LFO parameters these will be discussed in CHAPTER IV VOICE PRO GRAMMING Note however that the appropriate vo...

Page 17: ...using the breath controller The actual effect produced depends on the settings of the LFO parameters these will be discussed in CHAPTER IV VOICE PROGRAMMING Note however that the appropriate voice AMPLITUDE MODULATION SENSITIVITY parameter must be set to a value higher than 0 for amplitude modulation to be effective The voice AMPLITUDE MODULATION SENSITIVITY parameter will be discussed in CHAPTER ...

Page 18: ...hile subsequent presses on the VOICE NAME CURSOR button move the LCD cursor to the immediate right KEY SET During either of the normal DX27 play modes pressing the KEY SHIFT button instantly transposes the pitch of the entire DX27 keyboard up or down to a key programmed using this function When KEY SHIFT is engaged the letter K will appear at the left side of the LCD display until the KEY SHIFT bu...

Page 19: ... to and from cassette tape initializing the voice memory recalling voice data from a special safety buffer memory and turning the DX27 memory write protect function ON and OFF 6 RECALL EDIT In addition to the voice edit buffer the DX27 has a special edit recall buffer memory which maintains the last edited voice data If after editing or creating a new voice you inadvertently call new data into the...

Page 20: ...he 1 button again to actually execute the initialize operation Once executed the DX27 will automatically enter the EDIT mode ready for voice programming Pressing another function button the PLAY mode button or the EDIT mode button prior to the final step in the above process will abort the voice initialize function 8 EDIT BANK The EDIT BANK function allows you to load PRESET voices of the normal m...

Page 21: ...select an additional voice to change or press INTERNAL PLAY to exit the EDIT BANK function The following diagram shows approximately where in the DATA ENTRY control range the INTERNAL and PRESET voices are located NOTE The BANK memories are not actually loaded with the voice data but the voice number Thus when a BANK memory location is selected the voice corre sponding to the voice number stored i...

Page 22: ...ay which should be showing The display will now read Verify ready Press the 1 button then start the cassette recorder running in the PLAY mode The DX27 will now read each voice from the cassette tape and compare it with the corresponding voice data in the INTERNAL voice memory as the LCD indicates the verification process If the cassette and INTERNAL data matches the display will read Verify Compl...

Page 23: ...an be stored in any voice location using the STORE function When this function is initially called the LCD will read Load Single Press the 1 button to go on to the next step The LCD will now read Tape to BUFF You must now enter the voice number of the voice you wish to load from cassette do this by pressing the corresponding voice memory selector button The selected voice number will appear in the...

Page 24: ...d CASSETTE LOAD SINGLE functions will operate whether MEMORY protect is on or off When this function is called the LCD will read either M Protection or M Protect off according to the current state of the MEMORY PROTECT function MEMORY PROTECT is automatically turned ON each time main power to the DX27 is turned ON The 1 1 buttons and DATA ENTRY control are used to turn MEMORY PROTECT on or off 6 M...

Page 25: ...of all MIDI BASIC EVENT DATA and OTHER EVENT DATA with the exceptions noted below ON or OFF This function is turned ON or OFF using the 1 1 buttons Data transmitted and received whether this function is OFF or ON is KEY ON OFF SUSTAIN FOOTSWITCH ON OFF PITCH BEND WHEEL POSITION MONO POLY MODE SWITCH Data received whether this function is ON or OFF is ALL NOTES OFF Data NOT transmitted when this fu...

Page 26: ...n this function is ON voice parameter changes made in the DX27 s EDIT or FUNCTION modes are transmitted in real time If the SYS INFO button is pressed again the Midi Transmit display will appear If the YES button is then pressed then the DX27 will perform a bulk dump of all voice data INTERNAL voices 1 through 24 Voices 25 32 will be dumped as INIT VOICE parameters 2 4 ...

Page 27: ...e waves that interact to create the full harmonic spectrum for any voice Each digital sine wave oscillator is combined with its own envelope generator to form an operator Note that the operator s oscillator has two inputs one for the oscillator pitch data and one for modulation data CARRIERS AND MODULATORS The DX27 voice generator has 4 operators When the output of one operator is fed to the modul...

Page 28: ...carrier re lationship you change not only the fundamental pitch of the note but also the frequencies present in the harmonic structure Thus the timbre of the voice can be precisely controlled In addition since each operator has its own envelope generator and a sophisticated one too the harmonic structure of a note can be programmed to vary over time just as a plucked string changes its overtones a...

Page 29: ...ng rich organ voices think of each operator as different organ stops which can be mixed together as desired The algorithm alone however does not determine the actual sound of the voice The vital characteristics of the voice you create depend mostly on the frequencies and levels you program into each operator The 8 algorithms provided in the DX27 were specially selected because they offer the broad...

Page 30: ...dback ENVELOPE GENERATORS Consider what happens when you play a note on an acoustic instrument The level of the sound initially goes up to some value then eventually falls to nothing fol lowing a pattern that is characteristic of the particular instrument played For ex ample a low note on a pipe organ starts slowly when you press a key because it takes a while for the large column of air within th...

Page 31: ...ins at zero level when you press a key then begins to approach maximum EG level at a rate determined by the AR Attack Rate setting The en velope may reach maximum level instantly or it may take over 9 seconds depending on the setting of AR When the envelope reaches maximum level it immediately begins moving towards the next level in the envelope D1L Decay 1 Level at a speed determined by the setti...

Page 32: ...utton again The small letter e at the left side of the LCD will change to a C indicating that the COMPARE mode has been activated and that the voice you will now hear is the original voice before editing the parameters displayed on the LCD will also revert to those of the original voice You can then return to the voice being edited by pressing the EDIT COMPARE button again This can be repeated as ...

Page 33: ...ators 1 through 4 ON or OFF In many cases a voice will not require all operators in an algorithm Operators that are not needed should be turned OFF while editing Also during the voice creation process it is a good idea to start with all operators OFF and then turn them ON one at a time as you program and add them to the algorithm The four digits immediately preceding the algorithm number on the LC...

Page 34: ... The LFO parameters work together with the MODULATION SENSITIVITY 9 and 10 parameters and these must be set carefully to achieve the desired effect 3 LFO WAVE Permits selection of the low frequency oscillator waveform The available waveforms are SAW UP a rising sawtooth waveform SQUARE TRIANGLE and S HOLD sample and hold When used in conjunction with LFO SPEED DELAY LFO PMD and LFO AMD a vast rang...

Page 35: ...tting of 99 produces the greatest pitch variation dependent on the PITCH MODULATION SENSITIVITY setting described below 9 When the PITCH MODULATION SENSITIVITY parameter is set to maximum 7 the maximum pitch variation PM DEPTH 99 will be 800 cents Even if this parameter is set to 0 pitch modulation can still be applied via the modulation wheel or breath controller 7 LFO AMD This parameter sets the...

Page 36: ...LFO modulation to a carrier results in tremolo and applied to a modulator the result is a periodic variation in timbre similar to wah effects Applied to a modulator the result is brilliance control The data range is from 0 to 3 At 0 amplitude modulation sensitivity is OFF and no LFO effects can be applied to the selected operators A setting of 3 produces maximum sensitivity and therefore maximum e...

Page 37: ...ced For operators functioning as modulators this determines the harmonic spectrum of the sound produced Each operator can be set to any of 64 different frequency ratios as follows DX27 OPERATOR FREQUENCY RATIOS 0 50 0 71 0 78 0 87 1 00 1 41 1 57 1 73 2 00 2 82 3 00 3 14 3 46 4 00 4 24 4 71 5 00 5 19 5 65 6 00 6 28 6 92 7 00 7 07 7 85 8 00 8 48 8 65 9 00 9 42 9 89 10 00 10 38 10 99 11 00 11 30 12 0...

Page 38: ...ic variation in timbre similar to a phase shift effect The data range is from 3 to 3 for a maximum detuning range of 2 6 cents At 0 no detune effect is produced 15 19 ENVELOPE GENERATOR AR D1R D1L D2R RR These buttons select the specific envelope generator parameters to be worked on ATTACK RATE DECAY 1 RATE DECAY 1 LEVEL DECAY 2 RATE and RELEASE RATE The data range for AR D1R AND D2R parameters is...

Page 39: ...ed to the voice by that operator Varying the output level of an operator functioning as a modulator results in a change in the harmonic spectrum produced by the carrier thereby changing the timbre of the sound Data is entered using the DATA ENTRY slider or buttons 21 RATE SCALING This parameter makes it possible to gradually shorten the overall envelope length increase EG rate as higher notes on t...

Page 40: ...tave lower than middle C C4 is one octave higher than middle C etc Immediately after this function is called the desired new key can be selected simply by pressing any note on the keyboard between C1 and C5 within a plus or minus two octave range of middle C The keyboard s C3 key then assumes the pitch of the key played and all other keys are adjusted automatically Pressing any key higher than C5 ...

Page 41: ... by pressing the PLAY mode button Then hold down the STORE button this is the same as the EG COPY button and press the voice button to which you want to save the edited voice data The MEMORY PROTECT function must be OFF before attempting to use the STORE function 5 Two Approaches to There are two basic approaches that can be taken when programming voices on the DX27 First you can run through all t...

Page 42: ... have already backed up on cassette tape so that when you ve completed programming the voice you can save it Since all editing is done in the separate voice edit buffer nothing is erased while you are actually programming the voice But when you save the new voice whatever was in that memory location will be erased and replaced by the new data 40 ...

Page 43: ...T mode Select the ALGORITHM select parameter If you now play a note you will hear a sine wave Selecting the Algorithm STEP 2 In this voice there are two distinct sound components the main piano decay sound and a percussive attack ping For this purpose we ll use algorithm 5 which has two separate vertical stacks of two operators each The ALGORITHM parameter has already been called so select algorit...

Page 44: ...F 2 button The EG parameters you just set for operator 1 have now been copied to operator 2 You can check this by selecting operator 2 press OPERATOR SELECT and looking at the EG parameters AR RR STEP 6 Set OP1 and OP2 Output Levels In this step we ll create the basic timbre of our piano voice First select OP1 select the OPERATOR OUTPUT LEVEL parameter and set it to 99 Next select OP2 and set its ...

Page 45: ...To get a metallic attack ping we ll set the OP4 output level frequence ratio to 7 00 With OP4 selected press the OSCILLATOR FREQ RATIO button and set to 7 00 Play a note and listen to the attack sound Combine all Operators and Balance Levels Turn OP1 and OP2 back on so we can here the combined sound of the two operator stacks Play a note At this point the attack sound is far too loud so we ll redu...

Page 46: ...fect Select the LFO WAVE parameter set to triangle Select the LFO SPEED parameter set to 28 Select the AMD Amplitude Modulation Depth parameter set to 52 Select the MODULATION SENSITIVITY AMPLITUDE parameter set to 1 for OP2 only press the OPERATOR AMS ON OFF button Now try the voice That s it Name the new voice if you like by entering the FUNCTION mode and using the VOICE NAME function The only s...

Page 47: ... Terminals OUTPUT rated output level 20dB output impedance 10ΚΩ or less PHONES rated output level 16dB output impedance 47Ω or less FOOT SWITCH PORTAMENTO ON OFF SUSTAIN ON OFF MIDI IN MIDI OUT MIDI THRU CASSETTE transmission speed 1 200 baud BREATH CONTROL DC IN Power Supply US Canadian Model 120V 50 60Hz General Model 220V 50Hz Dimensions WxHxD 909 W x 82 H x 270 D mm 35 8 x 3 2 x 10 6 Weight 7 ...

Page 48: ...s ACTIVE SENSING NOTE ON OFF SUSTAIN SWlTCH PITCH BENDER POLY MODE MONO MODE MODULATION WHEEL BREATH CONTROLER DATA ENTRY SLIDER VOLUME DATA ENTRY SLIDER PLAY MODE PORTAMENTO SWITCH PROGRAM CHANGE PARAMETER CHANGE I VOICE BULK 32 VOICE BULK 46 ...

Page 49: ...OLY mode C l27 MONO mode V 0 OFF 127 ON b Transmitted when MIDI CH INFO is ON Control No Control code C 1 modulation wheel V 0 127 C 2 breath control V 0 127 C 6 data entry slider V 0 127 C 7 volume data entry V 0 127 C 65 portamento SW V 0 OFF 127 ON C 96 data entry 1 C 97 data entry 1 3 Program Change Status 1100nnnn Cn n channel no Program no 0ppppppp p 0 23 INTERNAL p 24 119 BANK This data is ...

Page 50: ... 3 2 1 Voice Bulk Data Status 11110000 F0 ID no 01000011 43 Substatus ch no 0000nnnn 0n Format no 00000011 03 Byte count 00000000 00 Byte count 01011101 5D Data 0ddddddd n channel no 93 bytes 0ddddddd Checksum 0eeeeeee EOX 11110111 F7 The data for one voice is transmitted when a voice selector is pressed in the PLAY mode Data in the voice edit buffer is transmitted when a format no f 3 dump reques...

Page 51: ...ppears when the SYS INFO key is pressed twice in the FUNCTION mode The data for all 32 voices will also be transmitted when a format no f 4 dump request is received The transmitted data is shown in voice data table 5 1 55 bytes of 0 s are added to the 73 bytes in this table so 128 bytes are transmitted for each voice 4096 bytes are therefore transmitted for all 32 voices Voices 25 through 32 are t...

Page 52: ...3 Reception Conditions 50 ...

Page 53: ...s greater than 0 The range of this instrument is C 1 to C7 If a higher or lower key number is received it will be output within the range limits For example received C 7 through C8 data will be output as notes in the C 6 through C7 range 3 Control Change Status 1011nnnn Bn n channel no Control no 0 c c c c c c c Control code 0vvvvvvv a Received whether MIDI CH INFO is ON or OFF Control no C 64 Sus...

Page 54: ...ll be turned OFF 4 2 2 System Exclusive Message 1 Parameter Change switch remote Status 11110000 F0 ID no 01000011 43 Substatus ch no 0001nnnn 1n n channel no Parameter group no 00001000 08 Switch no 0mmmmmmm Data 0ddddddd d 0 OFF 1 127 ON EOX 11110111 F7 All panel switches are controlled The switch numbers are arranged as shown in the illustration below Received only when MIDI SYS INFO is ON 2 Pa...

Page 55: ...ansmitted 32 voice bulk data This data can be received only when the MEMORY PROTECT function is OFF The received voice data is stored in the 24 INTERNAL voice memory locations Voices numbered 25 anf higher will be ignored The MIDI RECEIVED display appears to confirm complete reception of voice bulk data 5 Dump Request Status 11110000 Fn ID no 01000011 43 Substatus ch no 0010nnnn 2n n channel no Fo...

Page 56: ...ED 42 LFO DELAY 43 PITCH MODULATION DEPTH 44 AMPLITUDE MODULATION DEPTH 45 PITCH MODULATION SENSITIVITY AMPLITUDE MODULATION SENSITIVITY LFO WAVE 46 TRANSPOSE 47 PITCH BEND RANGE 48 CHORUS SWITCH PLAY MODE SUSTAIN FOOT SWITCH PORTAMENTO FOOT SWlTCH PORTAMENTO MODE 49 PORTAMENTO TIME 50 FOOT VOLUME RANGE 51 MODULATION WHEEL PITCH MODULATION RANGE 52 MODULATION WHEEL AMPLITUDE MODULATION RANGE 53 BR...

Page 57: ...MD 0 99 58 LFO SYNC SYNC 0 1 59 LFO WAVE LW 0 3 60 PITCH MODULATION SENSITIVITY PMS 0 7 61 AMPLITUDE MODULATION SENSITIVITY AMS 0 7 62 TRANSPOSE 0 4 8 62 TRANSPOSE MID C 0 48 63 PLAY MODE POLY MONO Poly Mode 0 1 64 PITCH BEND RANGE P Bend Range 0 12 65 PORTAMENTO MODE Full T Porta 0 1 66 PORTAMENTO TIME Porta Time 0 99 67 FOOT VOLUME RANGE 68 SUSTAIN FOOT SWITCH Foot SW 0 1 Pair 69 PORTAMENT FOOT ...

Page 58: ...VE 114 VERIFY 115 LOAD 116 LOAD SINGLE 117 118 119 MEMORY PROTECT 1 ON 120 KEY SHIFT 24 CENTER 121 PITCH BEND MODE 1 ON 122 KEY SHIFT 123 COMPARE 124 PITCH BEND MODE 125 PRESET SEARCH No 126 BANK VOICE No 127 BANK VOICE DATA LCD Display Data Note 0 1 0 3 E e 0 1 F f 0 1 Mem Store 0 1 P p 0 1 M Tune 0 127 Midi 0 1 Ch lnfo 0 1 Omni 0 1 Midi T Ch 0 15 Midi R Ch 0 15 Midi Sys lnfo 0 1 Midi Transmit 1 ...

Page 59: ...try knob Change 7 o l Data entry knob 7 in play mode o l Volume 64 o o Sustain foot sw 65 o l o l Portamento SW 96 o 1 x Data entry l 97 o 1 x Data entry 1 Prog o 0 119 3 o 0 127 l Change True 0 119 System Exclusive o 2 o 2 Voice parameters System Song Pos x x Song Se1 Common x x Tune x x System Clock x x Real Time Commands x x Aux Local ON OFF x x A11 Notes OFF x o 123 126 127 Mes Active Sense o ...

Page 60: ...SENSITIVITY VELOCITY 1 2 3 4 5 6 7 8 9 10 11 12 OP 4 3 2 1 FREQ RATIO DETUNE AR D1R D1L D2R RR OUT LEVEL RATE LEVEL OSCILLATOR ENVELOPE GENERATOR OPERATOR KEYBOARD SCALING 13 14 15 16 17 18 19 20 21 22 23 POLY MONO PITCH BEND PORTAMENTO FOOT SW WHEEL RANGE BREATH RANGE RANGE MODE TIME ASSIGN PITCH AMPLITUDE PITCH AMPLITUDE PITCH BIAS EG BIAS 58 24 ...

Page 61: ...DATE PROGRAMMER No V O I C E N A M E R E M A R K S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 5 1 6 17 18 19 20 21 22 23 24 59 ...

Page 62: ...ROGRAMMER A B No VOICE NAME R E M A R K S N o VOICE NAME R E M A R K S 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 1 0 1 1 11 1 2 1 2 13 13 14 14 1 5 15 1 6 16 17 17 18 18 1 9 19 20 20 2 1 21 22 22 23 23 24 24 60 ...

Page 63: ...C D No VOICE NAME REMARKS No VOICE NAME REMARKS 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 1 6 1 6 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 61 ...

Page 64: ...rence If your equipment does appear to be the source of the interference you should try to correct the situation by using one or more of the following measures Relocate either the equipment or the electronic device that is being affected by the interference Utilize power for the professional music equipment and the device being affected that are on different branch circuit breaker of fuse circuits...

Page 65: ...SINCE 1887 YAMAHA NIPPON GAKKI CO LTD HAMAMATSU JAPAN 85 09 0 2 CR Printed in Japan ...

Page 66: ...YAMAHA DX27 OM DX27 OM 9 20 98 198001 Yamaha Corporation of America 6600 Orangethorpe Avenue P O Box 6600 Buena Park CA 90622 6600 ...

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