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Sample trigger fix for tracker scopes

--- a/src/scopes/ft2_scopes.c

+++ b/src/scopes/ft2_scopes.c

@@ -422,7 +422,7 @@

 			continue;

 		}

-		const scope_t s = scope[i]; // cache scope to lower thread race condition issues

+		scope_t s = scope[i]; // cache scope to lower thread race condition issues

 		if (s.active && s.volume > 0 && !audio.locked)

 		{

 			// scope is active

@@ -429,7 +429,7 @@

 			scope[i].wasCleared = false;

 			// get relative voice Hz (in relation to C4/2 rate)

-			scope[i].drawDelta = (uint64_t)(scope[i].delta * ((double)SCOPE_HZ / ((double)C4_FREQ / 2.0)));

+			s.drawDelta = (uint64_t)(scope[i].delta * ((double)SCOPE_HZ / ((double)C4_FREQ / 2.0)));

 			// clear scope background

 			clearRect(scopeXOffs, scopeYOffs, scopeDrawLen, SCOPE_HEIGHT);

-- 

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