Thanks for the nudge. I was personally emailed a file with settings that contain pitch adjustments for every note, and the equation that generated the numbers. It looks quite interesting, and was developed by the person who contacted me. I assume that the individual reads this list and I'd like to encourage them to share the chart and equation with the full group.
The bottom line, though, is that I don't know yet if there exists a chart on the Railsback effect produced by Yamaha engineers in any of their manuals. I've been a bit more focused on learning whether or not there is an industry-level standard practice on the issue than in testing how it sounds. So far, from the various people who are closer to studio recording tech
than I, there doesn't seem to be much use or awareness of these
pitch adjustments, which kind of surprises me. Maybe it is related to
the ability of an acoustic musician to make adjustments on the fly, as I
learned to do when playing the oboe in the studio.
So, unfortunately, the task of testing how it actually sounds got back-burnered. A related project, more front and center a the moment, is a pilot test I have going for an experiment on whether timbre affects the perceived pitch of notes. I'm collecting data from a handful of people, and need to find a good data-analysis person to ensure that what I'm collecting via the test is suitable for quantifying/modeling. (I'm more a composer/programmer than a scientist.)
I haven't used my DX7S in the studio much lately and figuring out the logistics of inputting and using the data is a bit nervous-making (due to unfamiliarity), though probably doable. I've been doing more with an FM synth I programmed using Java that can produce equivalent voices to those I developed on the DX7. When I get a chance, the plan is to work the Railsback Curve data into the functions that convert MIDI pitches to Hz and vice versa, and see how it sounds. If I get this working, I'll post links to a something that compares the two intonations back-to-back. But it could be another month or more.
>From:
Eb Myatt
>Date: Thu, 19 Aug 2021 02:19:50 PDT
>Good Morning Phil,
>
>We
haven't received any feedback from you since you last posted. So, did
you manage to resolve the >"Railsback" tuning issue that you discussed?
Please let us know if you have the table for the DX7s >or any other
Yamaha synth ?
>
>Best Regards,
>E?
