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● Voice Mode Problems
Symptom Possible Cause
No Sound
Wrong pitch.
Unstable/indefinite pitch.
• Is the pitch envelope generator set properly? If the L0 through L3 param-
eters are set too low, the resultant pitch may be below the audible range
(page 74).
• Is the filter set in such a way that most of the sound is filtered out (page
65)?
• Is the total voice level set high enough (page 94)?
• Is the amplitude envelope generator attack time set to an excessively long
value (page 60)?
• Is an appropriate wave assigned to the voice (page 58)?
• Is the tuning set properly (page 58)?.
• Is the note shift parameter set properly (page 59)?.
• Is the random pitch parameter set properly (page 59)?.
• Is the aftertouch pitch bias parameter set properly (page 88)?.
• Is the LFO pitch modulation parameter set to an excessively high value
(page 78)?.
• Is the pitch envelope generator set properly (page 74)?.
● Song Mode Problems
Symptom Possible Cause
No Sound
Wrong pitch.
Some notes not played during
sequencer playback.
• Are voices/performance combinations properly assigned to the multi instru-
ments (page 148).
• Are the volume levels of the multi instruments set high enough (page 149)?
• Are the sequencer track transmit channels properly matched to the multi
instrument channels (Getting Started manual, page 47)?
• Are the note shift parameters for each multi instrument set properly (page
152)?.
• Are the tune parameters for each multi instrument set properly (page 153)?.
• Does the sequence data exceed the maximum polyphony of the SY85
(page 157)?.
● Other Problems
Symptom Possible Cause
No Sound
Wrong pitch.
• Is the local off mode selected (page 211).
• Are the keyboard transmit channel and voice receive channels matched
(page 212)?
• Is the master tune parameter set properly (page 210)?.
APPENDIX / TROUBLE SHOOTING