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best way to track note on/off in UI ?

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best way to track note on/off in UI ?

Subject: best way to track note on/off in UI ?
From: Scott Burgess <email@hidden>
Date: Wed, 17 Feb 2010 21:52:01 -0800

Hi List,

My AU UI has a keyboard and I am trying to hilite the notes playing. I have it

mostly working, but am looking for some advice or validation..

I am making PropertyChanged calls when the notes change and my UI is

picking the events up.

Setting inNotificationInterval in AUEventListenerCreate() to

0.05 seems pretty slow. Is setting it to 0.00 going to

cause any performance problems in other areas?

I have tried overriding StartNote() in my AU and sending the

PropertyChanged() from there, and also sending out the PropertyChanged

in SynthNote::Attack() and in SynthNote::NoteEnded(). They

all basically work, but I am not sure where the best place

is.

It doesn't seem super happy showing the note ons from the

Logic Piano roll keyboard, unless I very quickly release

the note, too.

Anyway, any advice would be appreciated.

Thanks!

Scott Burgess

Bitnotic

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