If you want Velocity XF to be turned on or off in general, assign a different (free) Controller to 'Vel.XF On' on the Synchron Player CONTROL page. In most cases this should make the performance better. Velocity XF gets turned on and off automatically depending on the articulation with the sound sets 'VE SY Special Editions' and 'VE SY Winds'. SYNCHRON-ized Special Edition users (except volumes 5 and 6) and SYNCHRON-ized Woodwinds: Lots of the percussion sounds don't blend well when crossfaded. Velocity X-Fade will not work for percussive instruments, because CC11 is not implemented for these instruments in the sound set. So it may be useful to turn Velocity X-Fade on and off from within your score like this:

In some cases two dynamic layers may be audible for only one voice in the score.

For big arrangements the hard drive may not be quick enough and some voices can get cut off.

More voices get streamed simultaneously.

The VI presets for the aforementioned instruments have Velocity X-Fade already activated with CC11 assigned by default.ДЄlthough Velocity X-Fade is recommended for Woodwinds, Brass, Strings and the Vienna Choir in Sibelius, it also has two drawbacks. This way it's possible to make dynamic transitions within notes.

With Velocity X-Fade turned on, all dynamic layers get streamed from the hard disk simultaneously. To Synchron Player it sends velocity and CC2 commands. General optimization tips Velocity X-FadeДЇor Woodwinds, Brass, Strings and the Vienna Choir Sibelius sends velocity and CC11 (MIDI Control Change 11) commands for the dynamics to the Vienna Instruments player.

Vienna ensemble pro 6 optimalization