set start position in RageSound::StartPlaying

stepmania/src/GameSoundManager.cpp

@@ -244,8 +244,6 @@ static void StartMusic( MusicToPlay &ToPlay )
 		if( ToPlay.bForceLoop )
 			p.StopMode = RageSoundParams::M_LOOP;
 		NewMusic->m_Music->SetParams( p );
-
-		NewMusic->m_Music->SetPositionSeconds( p.m_StartSecond );
 		NewMusic->m_Music->StartPlaying();
 	}
 

stepmania/src/RageSound.cpp

@@ -308,6 +308,9 @@ void RageSound::StartPlaying()
 {
 	ASSERT( !m_bPlaying );
 
+	// Move to the start position.
+	SetPositionFrames( lrintf(m_Param.m_StartSecond * samplerate()) );
+
 	/* If m_StartTime is in the past, then we probably set a start time but took too
 	 * long loading.  We don't want that; log it, since it can be unobvious. */
 	if( !m_Param.m_StartTime.IsZero() && m_Param.m_StartTime.Ago() > 0 )

stepmania/src/RageSoundManager.cpp

@@ -182,9 +182,6 @@ RageSound *RageSoundManager::PlaySound( RageSound &snd, const RageSoundParams *p
 	if( params )
 		snd.SetParams( *params );
 
-	// Move to the start position.
-	snd.SetPositionSeconds( snd.GetParams().m_StartSecond );
-
 	snd.StartPlaying();
 	return &snd;
 }
@@ -197,9 +194,6 @@ RageSound *RageSoundManager::PlayCopyOfSound( RageSound &snd, const RageSoundPar
 	if( pParams )
 		pSound->SetParams( *pParams );
 
-	// Move to the start position.
-	pSound->SetPositionSeconds( pSound->GetParams().m_StartSecond );
-
 	pSound->StartPlaying();
 
 	return pSound;