[freepats] BassLead update

[Roberto]

On Thu, Nov 08, 2018 at 05:29:59PM +0000, Strix SoundFont Team wrote:
> Sampled at 174.6KHz and downsampled to 44.1KHz. I transposed the patch down
> 2 octaves.
> Therefore there is less aliasing.

That's an interesting workaround that you found, thank you for your
work. Sounds better, I'll try to carefully filter the remaining unwanted
frequencies. If the filters "eat" some real harmonics, then I'll revert
to the unfiltered sounds, but I think it's worth trying.