ENSONIQ Corporation
SPM-1 Musician’s Manual
Page 10
PERFORMANCE NOTES
The SPM-1 offers several features that will help you in performance. Some of these features are always activated,
while some will require you to press a few buttons or utilize some of the jacks on the rear panel
FILTER RETUNING
You may feel it necessary to retune the internal filters of the SPM-1 after it has warmed up for a few minutes. This
is primarily a decision your ears will make. If the Piano sounds a bit duller, or brighter than normal, the filters may
have drifted. At any rate, the retuning procedure is quite simple.
After the SPM-1 has been turned on for about three minutes, press and hold down the MIDI button. While holding
the MIDI button, press the Stereo button. This instructs the SPM-1 to go through its power-up checking and tuning
sequence. You will then see the LED’s on the Bank and Sound buttons light in sequence. When they stop it means
that the filters are now retuned and you’re ready to continue playing.
VELOCITY SENSITIVITY
When you play an acoustic piano softly, the sound is mellow and quiet. When you play an acoustic piano hard, the
sound is bright and loud. The same thing happens with the SPM-1, assuming of course that your master keyboard
sends MIDI velocity information. This feature is called velocity sensitivity and it’s one of the main reasons why your
SPM-1 sounds so real. This feature also adds realism to all the other sounds, including the bass.
If you have any questions as to whether the MIDI keyboard you are using to drive the SPM-1 is velocity sensitive,
consult the manual or the manufacturer of the instrument.
STEREO OPERATION
The SPM-1 features a stereo imaging feature that “spreads out” the sound of the Piano when played through a
stereo amplification system or home stereo. In the stereo mode, it will be very difficult to tell exactly where the
sound of the Piano is coming from. In the proper environment, the sound of an acoustic piano will seem to come
from all parts of the room.
The electronic enhancement will make your Piano sound even more real. For an idea of what stereo amplification
can mean to your sound, try using headphones with the Piano and switch the Stereo button on and off to hear the
difference.
VOICE ASSIGNMENT
The SPM-1 is a 10-voice polyphonic instrument. This means that you can play up to 10 notes at any one time. If you
play more than 10 notes at any given time, the SPM-1 will “steal” the first played in order to play the 11th, the
second note for the 12th and so on, with one exception. The Piano will always hold on to the lowest note played.
This is called “Iowest-note priority” and has been designed into the Piano so that you will not lose your bass note.
You may notice this when using the sustain and sostenuto pedals (or if you happen to have more than 10 fingers).
When using a bass sound, 2 voices are assigned to the bass section, with 8 voices remaining for the upper
keyboard. The bass will not “steal” voices from the upper keyboard and the upper keyboard will not “steal” voices
from the bass.
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