Comment 1 for bug 1174292

I don't see how this is related to mouse scratching. Did you bisect down to
an actual revision that shows this or is that a guess? Or is it just a
temporal relation (i.e. it happened sometime since X) versus a causal
assertion?

On Mon, Apr 29, 2013 at 8:17 AM, Sean M. Pappalardo <
<email address hidden>> wrote:

> Public bug reported:
>
> (As of 1.11 r3846)
>
> Since the mouse scratching waveform work, controller scratching response
> is affected by the presence of vinyl widgets (getting worse the more
> that are on screen,) as well as by waveform frame rate, though to a
> lesser degree. The size of the skin or latency setting doesn't matter.
>
> This can be best reproduced using a sine wave sound file and preferably
> a controller with a high-resolution wheel (more than 500 ticks per
> revolution.) With the waveform set to the highest frame rate and
> software renderer, latency as low as the system allows, disable the
> vinyl widgets and slowly scratch the sine wave. Enable both widgets and
> scratch in the same way. Notice that the sound becomes warbly and space-
> like. Disable the vinyl widgets and the performance increases again.
>
> Also, change the frame rate of the waveform or switch to a GL-based one
> and do the same scratching listening for the warbliness.
>
> (I made a screen cap and Mixxx recording but am having trouble editing
> them together. Let me know if it would be helpful.)
>
> ** Affects: mixxx
> Importance: Undecided
> Status: New
>
>
> ** Tags: scratching
>
> --
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> Development Team, which is subscribed to Mixxx.
> https://bugs.launchpad.net/bugs/1174292
>
> Title:
> Controller scratch performance affected by GUI widgets
>
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