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Pitch of Compound Ranks

Using the CODM to create your own organ definitions, exchange CODM organ definitions, ...

Pitch of Compound Ranks

Postby chr.schmitz » Wed Dec 16, 2015 10:13 am

Hi Hauptwerker!

What is the pitch (RankBaseOutputPitch64ftHarmonicNum) of a compound rank (e.g. Mixture), especially if this rank has breaks?

And, is there a way to read out the pitch of a non-protected wav sample?

Best, Christoph
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Re: Pitch of Compound Ranks

Postby mdyde » Wed Dec 16, 2015 11:50 am

Hello Christoph,

There are two separate attributes in the CODM's Rank table:

Samples_RankBasePitch64ftHarmNumIfAssumedTunedToConcertPitch
Pitch_RankBaseOutputPitch64ftHarmonicNum

There's no definitively correct choice of value for compound stop samples. However, sample set producers would usually specify the 'base pitch' of the lowest of the compound pipes if the stop's ranks are unbroken across the compass, although in the case of mixtures (or other stops with broken compasses) often a single value is specified for the whole rank to approximate/represent the overall effect of the stop, or for a rank that's prominent throughout the compass -- probably 2' most commonly.

The important thing is that the values you specify match the values that the sample set producer used when they stored the pitch within the sample files when detecting their pitches. The sample set creator's guide highly recommends that sample set producers specify the necessary values for each rank with the following two attributes in the sample rank's installation package definition file, in order to make the rank fully compatible with the CODM (unless the sample set's licence specifically doesn't allow use of the sample set in the CODM):

CustomOrganRank.TunedToConcertPitchAndEqualTemp
CustomOrganRank.RankBasePitch64ftHarmNumIfTunedToConcertPitch

If the sample set producer hasn't included the rank details there (but does allow use of the sample with the CODM), then you'd probably need to:

- Contact them to request the relevant values, or:

- Experiment with different values to see which one works. If a mixture, then see whether assuming its pitch to be 2, or 4' or 1' gives the expected pitch.
Best regards,
Martin.

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Re: Pitch of Compound Ranks

Postby chr.schmitz » Wed Dec 16, 2015 12:40 pm

Hello Martin,

thank you very much for the ultra fast and detailed explanation!

Best regards,
Christoph
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Re: Pitch of Compound Ranks

Postby chr.schmitz » Fri Sep 23, 2016 4:11 pm

Hello Martin,

I finally figured out, why I was not able to implement several stops correctly in a CODM: the sample set producer altered the base pitch across the compass, e.g. 036-C to 047-B pitch 24, 048-C to 059-B pitch 16, 060-C to 071-B pitch 12 etc...

I assume, that this behavior cannot be easily implemented in a CODM. I could imagine, that it may be possible to split the rank into different sections (partial ranks). But all sections (ranks) will finally show up as individual ranks in the rank audio/memory options/routing screen. Or is it possible in a CODM to combine several ranks into one single visible entry?

Thanks in advance!
Christoph
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Re: Pitch of Compound Ranks

Postby josq » Fri Sep 23, 2016 4:45 pm

Yes, creating multiple ranks is the common work around in CODM sets.
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Re: Pitch of Compound Ranks

Postby chr.schmitz » Sat Sep 24, 2016 1:55 am

Josq, thank you for the rapid response! Is it possible to combine these ranks into a single entry in the rank audio/memory options/routing window?

Christoph
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Re: Pitch of Compound Ranks

Postby TheOrganDoc » Sat Sep 24, 2016 2:04 pm

All Mixtures are usually stated in the Organ spec's as say, "Mix-13-17-19" if so at least the lowest pipe plays "say the 13th of middle C" which is the 13th note above say middle C key,---is C above or 523.3 ,(in con. pitch.) ! :roll:
, Mixtures work in building a dense harmonic structure !

This is from my Octogenarian Memory, Those in the know correct me, if I'm wrong ! Thanks
Mel..............TheOrganDoc...............
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Re: Pitch of Compound Ranks

Postby Morse » Sat Sep 24, 2016 3:21 pm

chr.schmitz wrote: Is it possible to combine these ranks into a single entry in the rank audio/memory options/routing window?

I think the answer is "no". If you're just doing CODM coding then each section of the mixture needs to be a separate rank. But it's not so bad when you use the "rank audio/memory options/routing window" if the ranks are logically named. For example, look at the great and pedal mixtures in this pic
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It's easy to highlight and add them all to the same audio group.
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Re: Pitch of Compound Ranks

Postby chr.schmitz » Sun Sep 25, 2016 12:44 am

Al, thank you! This is exactly, was I expected...
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Re: Pitch of Compound Ranks

Postby mdyde » Mon Sep 26, 2016 8:21 am

Hello Chris,

To confirm, yes -- separate CODM.Rank objects would indeed always appear to the user as separate rank entries on the audio routing and voicing screens.
Best regards,
Martin.

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Re: Pitch of Compound Ranks

Postby chr.schmitz » Mon Sep 26, 2016 8:45 am

Martin, thank you very much! In this case I would like to file a feature request :wink:

Best, Christoph
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Re: Pitch of Compound Ranks

Postby mdyde » Mon Sep 26, 2016 9:47 am

Hello Christoph,

Thanks for the suggestion. I've logged as an enhancement request that you'd like a means within the CODM to aggregate multiple Rank entries that enumerate non-overlapping partial compasses with different sample pitches (e.g. mixtures in some sample sets).
Best regards,
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Re: Pitch of Compound Ranks

Postby chr.schmitz » Mon Sep 26, 2016 11:27 am

Thank you !!!
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