[sdiy] Fantasia patch for DX11/TX81Z/V50

Ben Stuyts ben at stuyts.nl
Thu Feb 6 22:51:32 CET 2020


Hi,

Here is the missing attachment. I had to adjust the EQ on the mailing list to allow .syx files to pass through.

Ben
 
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> On 6 Feb 2020, at 15:14, John Ames <commodorejohn at gmail.com> wrote:
> 
> Just for kicks the other day, I got to trying to roll up a patch on my
> Yamaha V50 recreating the immortal "Fantasia" preset from the Roland
> D50. There's a handful of different mimicries out there in the
> assorted public-domain banks, but a lot of them sound terrible, and
> even the ones that sound nice are only loose imitations - but the D-50
> soundbank for DX7-II years ago proved that FM can do surprisingly
> close approximations of some of its characteristic sounds, it's just a
> matter of careful planning and analysis. The subtractive pad tone was
> dead easy; the bell part took a lot more finagling to get it anything
> close to right, and in the end it mostly came down to trial-and-error
> comparison against the genuine article.
> 
> (I'm very curious about what I ended up at - operator ratios of
> 5.2:8.2 C:M - because that works out to a ratio of 26:41, which is
> super prime-y for what on the D-50 is just a simple cyclic "spectrum"
> waveform with the fundamental removed, but damned if it didn't sound a
> whole lot closer to right than the more obvious setting of 5:8. But
> since there doesn't seem to be a dump of the D-50's PCM ROM out there
> as far as I can tell, it's a mystery to me...)
> 
> It's definitely not perfect - the chime part loses something in the
> lower range for reasons I'm not clear on, and without the D-50's lush
> effects it's noticeably thinner. But I'm happy with how close I got to
> the overall timbre(s), and when you layer it up a few times over and
> detune a bit (or just run it through an outboard chorus,) it gets a
> lot closer :)
> 
> SysEx attached - it's a single-voice V50 transmit dump, which should
> also be compatible with the DX11 and TX81Z.
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