Re: [LAU] midi velocity

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To: Asa Marco <>
Cc: Linux Audio User <linux-audio-user@...>
Date: Sunday, December 16, 2012 - 4:13 am

On Thu, 13 Dec 2012, Asa Marco wrote:

> Hi, I once had the same problem with a sampled piano, So I started

On the suggestion of some others on the list, I checked the velocity
output of my Yamaha SY99 against my Ensoniq ESQ-1... (There were some
posts awhile back saying it might be a Yamaha thing to send weak
velocity data). Well, it's true, in fact, they seem to be opposites!
While the SY99 seems to never send quite high enough velocities to
FluidSynth for what most soundfonts seem to be expecting (even on the
SY99's most compensated action setting), the ESQ-1 plays everything too
loud, even on its softest action setting. So there does seem to be a
big difference in the way different keyboards scale these things. And
oddly I never noticed this in all the years I've been sequencing in a
pure physical gear environment -- if you want problems you've never had
before, use a computer....

So, I took your advice and installed QmidiCurves, and now I can have
whatever velocity curve I want. The author seems to have created the
Makefiles with a lot of Debian/Ubuntu assumptions though, so for anyone
wanting to compile on Gentoo:

- if not already installed, emerge x11-libs/qwt:5 (the 5.x version)
from Portage which is needed as a dependency

- download and extract...

- in, change LIBPATH to /usr/lib
and change LIBS to -lqwt (not -lqwt-qt4)
and add this line: INCLUDEPATH += /usr/include/qwt

- qmake -recursive CONFIG+=debug_and_release

- fgrep -lr 'qwt-qt4/' | xargs sed -i 's|qwt-qt4/|qwt5/|g'

- lrelease lang-en.ts lang-fr.ts
(strangely, the Makefile doesn't do this itself)

- 'make release'

This will produce a 'QMIDICurves' binary that's ready to go. There is
no Makefile driven 'make install' that actually does anything, so just
put it in your /usr/local/bin and it works. It will create an Alsa Midi
input and output visible in your connection manager.

I should probably make an ebuild for this sometime Real Soon Now...

Also, the unlabeled icons in the upper right are:
move point, create point, delete point (not mentioned in the docs)

+ Brent A. Busby + "We've all heard that a million monkeys
+ Sr. UNIX Systems Admin + banging on a million typewriters will
+ University of Chicago + eventually reproduce the entire works of
+ James Franck Institute + Shakespeare. Now, thanks to the Internet,
+ Materials Research Ctr + we know this is not true." -Robert Wilensky
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Messages in current thread:
[LAU] midi velocity, Brent Busby, (Thu Dec 13, 5:05 pm)
Re: [LAU] midi velocity, Ralf Mardorf, (Thu Dec 13, 5:47 pm)
Re: [LAU] midi velocity, Brent Busby, (Thu Dec 13, 6:25 pm)
Re: [LAU] midi velocity, Egor Sanin, (Thu Dec 13, 6:47 pm)
Re: [LAU] midi velocity, Asa Marco, (Thu Dec 13, 5:38 pm)
Re: [LAU] midi velocity, Brent Busby, (Sun Dec 16, 4:13 am)
Re: [LAU] midi velocity, david, (Thu Dec 13, 7:38 pm)
Re: [LAU] midi velocity, Brent Busby, (Thu Dec 13, 6:24 pm)