Your Optimus Concertmate 690 Porta- ble Electronic Keyboard is a state-of- the-art musical instrument with many special features. It can sound like 100 different musical instruments or sound effects, and its preset rhythms and ac- companiments make it easy to use and fun! This versatile electronic keyboard is ideal for anyone who wants to make music, from the beginner to the experi- enced musician.

Your Concertmate 690???s features in- clude:

Standard Size Keys ??? let you easily transfer what you learn using the Con- certmate 690 to other keyboard instru- ments.

Built-In Demonstration Tune ??? lets you hear a sample of what you and the Concertmate 690 can do.

Polyphonic Sound ??? lets you play and hear up to eight notes at the same time so you can create or play almost any type of music.

Poly/Texture Key ??? lets you adjust the Concertmate 690???s polyphony (harmony) and sound texture.

100 Different Sounds ??? let you set your Concertmate 690 to sound like anything from a banjo to an insect when you press a key.

100 Preset Auto-Rhythms ??? give you a steady beat for almost any style of music from rock to waltz.

Auto Accompaniment ??? lets you au- tomatically play a harmonic pattern to match any auto-rhythm.

Tempo Controls ??? let you speed up or slow down the tempo of any auto- rhythm or auto accompaniment.

Fill-In Rhythm ??? lets you insert a short variation into any auto-rhythm.

Three Power Options ??? let you pow- er the Concertmate 690 from internal batteries (not supplied), a standard AC outlet (using an optional adapter), or your vehicle???s cigarette lighter socket (using an optional adapter).

To fully enjoy the features and func- tions of this electronic keyboard, please read this manual carefully and completely.

Note: This manual explains how to use this electronic keyboard. It does not teach music.

We recommend you record your Con- certmate 690???s serial number here. The number is located on the bottom of the Concertmate 690.

Serial Number _________________

THE FCC WANTS YOU

TO KNOW

This electronic keyboard complies with the limits for a Class B digital device as specified in Part 15 of FCC Rules. These limits provide reasonable pro- tection against radio and TV interfer- ence in a residential area. However, your Concertmate 690 might cause TV or radio interference even when it is operating properly. To eliminate inter- ference, you can try one or more of the following corrective measures:

???Increase the distance between the Concertmate 690 and the radio or TV.

???Use outlets on different electrical circuits for the Concertmate 690 and the radio or TV.

Consult your local RadioShack store if the problem still exists.

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CONNECTING POWER

For portable use, you can power your Concertmate 690 using internal batter- ies. Using optional adapters, you can also power it from a standard AC outlet or your vehicle???s cigarette lighter sock- et.

2.Press the tab on the battery com- partment cover in the direction of the arrow, then pull up to remove the cover.

Tab

???Connecting an AC or DC adapter automatically disconnects internal batteries.

???Always disconnect an AC or DC adapter when you finish using the Concertmate 690.

Using Batteries

Your Concertmate 690 can use six AA batteries for power. For the best per- formance, we recommend alkaline batteries, such as RadioShack Cat. No. 23-552.

Cautions:

???Use only fresh batteries of the re- quired size and recommended type.

???Do not mix old and new batteries, different types of batteries (stan- dard, alkaline, or rechargeable), or rechargeable batteries of differ- ent capacities.

1. Set MODE to POWER OFF.

3.Put the batteries into the compart- ment as indicated by the polarity symbols (+ and ???) marked beside the compartment.

4.Replace the cover.

Notes:

???If you do not plan to use the Concertmate 690 with batteries for a week or more, remove the batteries.

???If the Concertmate 690 sounds weak or does not work properly, replace all six batteries. Do not mix old and new batteries.

Caution: Dispose of old batteries promptly and properly.

Cautions:

???Always remove old or weak bat- teries; batteries can leak chemi- cals that can destroy electronic parts.

???Dispose of old batteries promptly and properly.

Using AC Power

You can power your Concertmate 690 from a standard AC outlet using a 9- volt AC adapter, such as Cat. No. 273- 1656.

Cautions:

???You must use an AC adapter that supplies 9 volts of DC power and delivers at least 500 milliamps. Its center tip must be set to negative, and its barrel plug must properly fit the Concertmate 690???s DC 9V jack. The recommended adapter meets these specifications. Using an adapter that does not meet these specifications could dam- age the Concertmate 690 or the adapter.

???Always plug the AC adapter into the Concertmate 690 before you plug it into the AC outlet. Always unplug the AC adapter from the AC outlet before you unplug it from the Concertmate 690.

1.Set MODE to POWER OFF.

2.Insert the AC adapter???s barrel plug into the DC 9V jack on the rear of the Concertmate 690.

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3.Plug the adapter into a standard AC outlet.

Using Vehicle Battery Power

You can power your Concertmate 690 from your vehicle???s cigarette lighter socket using a DC adapter, such as Cat. No. 270-1562.

Cautions:

???You must use a DC adapter that supplies 9 volts of DC power and delivers at least 500 milliamps. Its center tip must be sent to nega- tive, and its barrel plug must prop- erly fit the Concertmate 690???s DC 9V jack. The recommended adapt- er meets these specifications. Us- ing an adapter that does not meet these specifications could dam- age the Concertmate 690 or the adapter.

???Always plug the DC adapter into the Concertmate 690 before you plug it into the cigarette lighter socket. Always unplug the DC adapter from the cigarette lighter socket before you unplug it from the Concertmate 690.

1.Set MODE to POWER OFF.

2.Connect the adapter???s 5.5 mm outer diameter/2.1 mm inner di- ameter plug to the adapter???s cord, matching TIP to negative (???).

3.Set the adapter???s voltage switch to 9 volts.

4.Insert the adapter???s barrel plug into the Concertmate 690???s DC 9V jack.

5.Plug the other end of the adapter into the vehicle???s cigarette lighter socket.

USING THE SHEET

MUSIC STAND

To easily view sheet music while play- ing your Concertmate 690, insert the supplied sheet music stand into the holes on the top rear panel.

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BASIC OPERATION

1. Set VOLUME to MIN.

2.Set MODE to NORMAL to turn on the Concertmate 690. The MODE indicator lights.

3.To hear a sample of the Concert- mate 690???s many sounds, play the demonstration tune (see ???Playing the Demonstration Tune???).

To make your own music, simply begin playing the keyboard. The Concertmate 690 automatically selects the sound PIANO (No. 00) each time you turn it on. To select a different sound, see ???Using the Preset Sounds??? on Page 10.

4.Adjust VOLUME to the desired set- ting. Slide it toward MAX to in- crease the volume, or toward MIN to decrease the volume.

5.To turn off the Concertmate 690, set MODE to POWER OFF. The MODE indicator turns off.

PLAYING THE

DEMONSTRATION TUNE

Your Concertmate 690 can play a pre- programmed demonstration tune that showcases its many sounds. To play the demonstration tune, press DEMO and adjust VOLUME to the desired set- ting. Your Concertmate 690 continu- ously plays the demonstration tune. Press DEMO again to stop the tune.

Note: You cannot play the keyboard while the demonstration tune is play- ing.

USING THE PRESET

SOUNDS

Your Concertmate 690 can sound like 100 different musical instruments or sound effects. The name and two-digit number of each preset sound is listed on the Concertmate 690???s top panel.

100 SOUNDS List

Selecting/Playing a Preset

Sound

1.Set VOLUME to MIN.

2.Set MODE to NORMAL.

Note: The Fingered and Concert Chord modes are described in ???Using Auto Accompaniment??? on Page 13.

3.Press SOUND POLY/TEXTURE.

4.Select a sound from the 100 SOUNDS list and enter the two- digit number on the SOUND/ RHYTHM SELECT keypad. For ex- ample, to select OBOE (No. 47), press 4, then 7.

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SOUND/RHYTHYM

SELECT Keypad

5.Play the keyboard to hear the se- lected sound.

6.Adjust VOLUME to the desired level.

7.To select a different sound, repeat Step 4. Or, if the second digit of the current sound is the same as the first digit of the new sound, simply enter the second digit of the new sound on the SOUND/ RHYTHM SELECT keypad.

For example:

Notes:

???Some preset sounds, such as IN- SECT (No. 82) and MOTORCY- CLE (No. 89), do not follow the musical scale when played, but produce varying sounds with each key you press.

???These preset sounds change slightly as you play different oc- taves on the keyboard: SAMBA WHISTLE (No. 10), TOM (No. 54), ROCK DRUM (No. 55), SWING DRUM (No. 56), TRIANGLE (No. 57), MATSURI (No. 59), INSECT (No. 82), EMERGENCY ALARM (No. 83), LASER BEAM (No. 84), COSMIC SOUND (No. 85), TELE- PHONE (No. 86), and CAR HORN (No. 87).

Playing KEYBOARD SPLIT

Sounds

The KEYBOARD SPLIT preset sounds (Nos. 90???99) let you play two instru- ment sounds independently on oppo- site halves of the keyboard. The instrument listed first in the sound???s name plays on the left half of the key- board. The instrument listed last plays on the right half of the keyboard.

KEYBOARD SPLIT Sounds

For example, BASS/PIANO (No. 91) plays a bass sound on the left half of the keyboard and a piano sound on the right.

To play a KEYBOARD SPLIT sound, follow the steps in ???Selecting/Playing a Preset Sound??? on Page 10 and select any sound from Nos. 90???99.

Playing Drum/Bass Split

Sounds

The preset sounds SLAP BASS (No. 29), ELEC BASS (No. 30), WOOD BASS (No. 31), SNARE BASS (No. 32), and SYNTH-BASS (No. 69) let you play drum sounds on the key- board???s lowest octave and bass sounds on the upper (other) three oc- taves.

To play a drum/bass split sound, follow the steps in ???Selecting/Playing a Pre- set Sound??? on Page 10 and select any sound from Nos. 29???32 or No. 69.

USING THE PRESET

AUTO-RHYTHMS

Your Concertmate 690 has 100 preset auto-rhythms that provide a steady beat for your music. The name and two-digit number of each preset auto- rhythm is listed on the Concertmate 690???s top panel.

100 RHYTHMS List

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Selecting/Playing an Auto-

Rhythm

1.Set VOLUME to MIN.

2.Set MODE to NORMAL.

Note: The Fingered and Concert Chord modes are described in ???Using Auto Accompaniment??? on Page 13.

3.Press RHYTHM.

4.Select an auto-rhythm from the 100 RHYTHMS list and enter the two-digit number on the SOUND/ RHYTHM SELECT keypad. For ex- ample, to select EURO BEAT (No. 24), press 2, then 4.

SOUND/RHYTHYM

SELECT Keypad

5.Press START/STOP. The Concert- mate 690 begins playing the se- lected rhythm.

6.Adjust VOLUME to the desired level.

7.To speed up the rhythm, press TEMPO . To slow it down, press

TEMPO .

Note: You can adjust TEMPO / to play an auto-rhythm from 40 to 256 beats per minute.

8.Play the keyboard to hear the se- lected sound along with the rhythm.

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9.To select a different rhythm, re- peat Step 4. Or, if the second digit of the current rhythm is the same as the first digit of the new rhythm, simply enter the second digit of the new rhythm on the SOUND/ RHYTHM SELECT keypad.

10.To stop an auto-rhythm, press

START/STOP again.

Using FILL-IN

The Concertmate 690 lets you insert a variation into any of its 100 preset auto-rhythms.

While an auto-rhythm is playing, press FILL-IN. The Concertmate 690 inserts a 1- to 2-measure variation, then auto- matically resumes the original rhythm pattern at the end of the current mea- sure. To insert another variation, press

FILL-IN again.

To insert a variation longer than 1???2 measures, hold down FILL-IN. The Concertmate 690 plays the variation until you release FILL-IN, then auto- matically resumes the original rhythm pattern at the end of the current mea- sure.

USING AUTO

ACCOMPANIMENT

After you select an auto-rhythm, the Concertmate 690 lets you automatical- ly add a harmonic accompaniment.

You can select from two auto accompaniment types???easy random fingering or standard fingering. Both methods are explained in detail in the following sections. But, in brief, to add an auto accompaniment pattern, first set MODE to CONCERT CHORD for easy random fingering or to FINGERED for standard fingering. Then use the ???accompaniment keys??? (the 18 keys with raised labels above them) to se- lect the chord. Use the rest of the keys to play the melody.

Raised

Key

Labels

Accompaniment

Keys

Easy Random Fingering

The easy random fingering method lets beginning keyboard players easily select and play a chord.

The number of accompaniment keys you press determines the type of chord played. The following chart shows the type of chord that plays when you press one, two, three, or four accom- paniment keys at the same time.

The lowest note you play determines the key of the chord. For example, if the lowest note is C, the Concertmate 690 plays a C chord.

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Note: You can press any labeled note(s) to the right of the lowest note in the chord to produce a minor, seventh, or minor seventh chord.

Number of Keys

Follow these steps to start easy ran- dom fingering auto accompaniment.

Pressed

Chord Type

C D E F G A B C D E F

Major

C D E F G A B C D E F

Minor (m)

C D E F G A B C D E F

Dominant

Seventh (7)

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Follow these steps to start standard fingering auto accompaniment.

1.Set VOLUME to MIN.

2.Set MODE to FINGERED.

3.Select and enter an auto-rhythm.

4.To start the auto-rhythm and auto accompaniment at the same time, simply press at least three accom- paniment keys to play the desired chord.

To start the auto-rhythm before you begin the auto accompani- ment, press START/STOP. Then, at the desired interval, begin the ac- companiment by pressing at least three accompaniment keys.

Note: When MODE is set to FIN- GERED, the Concertmate 690 does not respond if you press fewer than three accompaniment keys.

5.Adjust TEMPO / and VOLUME to the desired levels.

6.To change chords without inter- rupting the rhythm, simply press the auto accompaniment keys re- quired to form the new chord.

7.To stop auto accompaniment and auto-rhythm, press START/STOP.

Note: After you press the auto ac- companiment keys, the Concert- mate 690 plays until you press other keys to play a different chord or until you press START/ STOP.

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ADJUSTING THE

POLYPHONY/TEXTURE

The Concertmate 690 lets you adjust the polyphony and texture of its sound.

Note: ???Polyphony??? refers to the level of harmony and the number of notes played to produce the sound. ???Texture??? refers to the sound???s quality or depth.

Your Concertmate 690 is automatically set to high-level polyphony/texture ev- ery time you turn it on and begin play- ing.

To switch to low-level polyphony/tex- ture at any time during play, simply press SOUND POLY/TEXTURE. To switch back to high-level polyphony/ texture, press it again.