Yamaha PortaTone PSR-1000 Quick Steps - Page 28
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Also for Yamaha PortaTone PSR-1000: Service Manual (19 pages)
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Saving the Edited Effect:
1) Press the [I] 'SAVE' button.
2) Rename the effect, if desired.
3) Press the '8' [^] 'OK' button.
Balance Setting:
1) Press the [MIC. SETTING] button.
2) Press the [J] button to select 'VOCAL HARMONY CONTROL'.
3) Use the '4' [v] toggle button to select 'L<H63' for the Balance ('Bal.') section.
Owner's Manual, p. 130-132