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Re: Towards a new pitch representation

From: Felipe Gonçalves Assis
Subject: Re: Towards a new pitch representation
Date: Thu, 30 Dec 2010 19:55:18 -0300

Hi Carl,

> Hi, Felipe.
> I've looked at your patch, but I'm having a bit of trouble seeing how the
> patch resolves the issues that are identified in issue 1278.
> I must admit that i've not yet fully understood Hans's emails on issue 1278.
> How do your new two-element alterations improve the situation?

You don't need to go back to those emails. I hope the attachment in my
last email can help. But for a simple example of how my patch works,
when you type, e.g., ciseh' in a LilyPond input file, this is mapped to a
pitch that has as alteration (1 . -1), meaning "one semitone minus one
quarter-tone", which might then be typeset as a sharp with a down-arrow.

In contrast, cih' has as alteration (0 . 1), which might be mapped to
a natural with an up-arrow.

The current representation cannot make that distinction, both alterations
would be 1/4 (for this reason ciseh is not even defined).

> It would be very helpful for me to discuss this patch if you had a test file
> that shows how the new features are used.

I am very sorry for forgetting to provide this. I am attaching some examples. demonstrates the functionality requested in issue 1278. is an adaptation of the snippet
using the new interfaces.

> It would be even better if there were a test file that compiled but didn't
> behave properly in 2.13.44, and then a corresponding file that does behave
> properly in your patch.

This is an enhancement request for which we have files that did not
compile in the previous version, but that now produce nice scores
(again, see


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