double buffering, triple buffering

ok in my game I was using double buffering, but after I put sound in it slowed down when I went to go to another screen and scroll. So now I use triple buffering which works great for the scroll. But triple buffering on regular movement is sorta jerky. \

So how do I use only double buffering in a dx7 flip command, vs. the triple buffering?

Are you using time based movement?

yes for the character who i want to only be double buffered

Upload what you got. I'll see what's going on. But if the computer is going haywire and you hear annoying loading noises from your tower, then of course the time based movements gonna appear jerky because it's trying to jump back to where it is suppose to be and catch up to normal speed.

VB Code:

'get the screen surface and create a back buffer too
    ddsd1.lFlags = DDSD_CAPS Or DDSD_BACKBUFFERCOUNT
    ddsd1.ddsCaps.lCaps = DDSCAPS_PRIMARYSURFACE Or DDSCAPS_FLIP Or DDSCAPS_COMPLEX
    ddsd1.lBackBufferCount = 2 '2 for triple buffering 1 for double buffering
    Set primary = dd.CreateSurface(ddsd1)
    
    'Get the backbuffer
    Dim caps As DDSCAPS2
    caps.lCaps = DDSCAPS_BACKBUFFER
    Set backbuffer = primary.GetAttachedSurface(caps)
    backbuffer.GetSurfaceDesc ddsd3
 
'then I write to the buffer like so
 Sub RenderDrawThing2(TileSourcesurf As DirectDrawSurface7)
Dim r As RECT, retVal As Long
            r.Left = 0
            r.Top = 0
            r.Right = 50
            r.Bottom = 50
                'This is where we copy the tile from the source to the destination
                retVal = Mainsurf.BltFast(x * 50 - 50, y * 50 - 50, TileSourcesurf, r, DDBLTFAST_WAIT)
End Sub
 
'And I flip like so
Sub RenderBackBuffer()
            Dim ddrval As Long
            Dim rBack As RECT
            ddrval = backbuffer.BltFast(0, 0, Mainsurf, rBack, DDBLTFAST_WAIT)
            primary.Flip Nothing, DDFLIP_WAIT
 
End Sub

so my question again is how can I use double buffering sometimes and triple buffering sometimes throughout the program?

bump!