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<p>Sets the pitch lines display mode (automatic by default). Use Pitch lines display mode constants to pick lines which will be be displayed. Example : "kCLine + kGLine" will displayed C and G line. "kNoLine" doesn't display any line. "kAutoLines" adjust line display according to piano roll pitch range (automatic possibilities : no line, C line, C and G line, chromatic scale, diatonic scale);. </p>
<dl><dt><b>Parameters:</b></dt><dd>
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