Keyboard tracking of envelope generator times (e.g. attack, decay, release)

[PV70]

Dear all,

I would propose to add a little feature to SFZ envelope generators which I have always found quite useful in older HW synths (e.g. the Roland JV series): the programmable scaling of envelope times (e.g. attack/decay/release) according to keyboard tracking.

In the most general implementation, a programmer would be allowed to define a separate keyboard tracking value for each envelope time parameter (i.e. attack/decay/release); however, even having a single keyboard tracking parameter affecting the duration of the whole envelope might work to some extent.

The benefit of such keyboard tracking feature would be a very economical modelling of a typical characteristic of resonating acoustic instruments (e.g. pianos/guitars) for which the envelope tends to elapse quicker on higher notes.

Looking at the existing issues in this database, I believe this SFZ opcode proposal may partially answer the requirement expressed in issue #31.

Thank you for your support and keep up the excellent work!

Best regards,
Paolo

[PV70]

Hi David, Thanks a lot for your answer. One thing that's not clear to me is whether similar constructs are actually available for ENV times: can you please elaborate? Thank you, Paolo

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On Thu, 27 Jul 2023 at 21:43, David Viens ***@***.***> wrote: Some ARIA Extension SFZs in the field already have been using a variant of this idea (since 2021 ish) EG: offset_mode=percent //switches the offset opcode from its default "offset_mode=samples" behaviour offset_oncc257=50 //random offset from 0 to half the file — Reply to this email directly, view it on GitHub <sfz/opcode-suggestions#32 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEN2MNATSTPMKVZBCWGB5XDXSLAF5ANCNFSM6AAAAAAYCFBAOE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[plgDavid]

I deleted my reply and posted it in the "offset" ticket instead. It was an error on my end. I didnt do anything with env scaling.