Laura Conrad wrote:
> I'm trying to set up my USB MIDI keyboard so that it will play through
> a synthesizer with a reasonable harpsichord (or for present purposes,
> lute) sound and also use tuning tables such as the ones from scala for
> meantone tuning.
>
> Running scala itself on my Ubuntu Intrepid system is problematic, and
> I haven't gotten it to actually make any sounds yet. Almost
> everything I try hangs without giving me a useful error message.
>
> I can run qsynth with a .sf2 font from hammersound.com and get a
> pretty good harpsichord sound, but I don't know how to alter the
> tuning.
>
> I can run zynaddsubfx with a .scl tuning table loaded, but the plucked
> string sounds that come with zynaddsubfx aren't anything like as good
> as the harpsichord soundfonts.
>
> Has anyone solved anything like this problem?
TiMidity++ (mine is version 2.13.2) accepts sf2 files, and the following
command line arguments:
-Z file, --freq-table=file
Cause the table of frequencies to be read from file. This is useful to define
a tuning different from 12-equal temperament. If ``pure'' is specified,
TiMidity++ plays in trial pure intonation.
-Zpure[n(m)], --pure-intonation=[n(m)]
Play in trial pure intonation by Key Signature meta-event in the MIDI file.
You can specify the initial keysig by hand, in case the MIDI file does not
contains the meta-event. Optionally, n is the number of key signature. In
case of sharp, n is positive. In case of flat, n is negative. Valid values
of n are in the interval from -7 to 7. In case of minor mode, you should
put `m' character along with -Zpure option.
The format for the table of frequencies is a simple text file with 128
integers representing the frequency in Hz of each MIDI note number.
As an example, the attached BC program generates a table of frequencies
corresponding to the equal temperament.
Regards,
Pedro
/*
* Calculation of a MIDI table of frequencies for timidity
*
* Process with GNU bc:
* $ bc -l equal_temperament.bc
*
* Copyright (c) 2003 Pedro Lopez-Cabanillas
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* trucate a number, returning the integer part of the argument
*/
define trunc(x) {
auto t, tmp_scale
tmp_scale=scale(sqrt(2))
scale=0
t=x/1
scale=tmp_scale
return t
}
/*
* round a number, truncs or shifts it to the next integer
*/
define round(x) {
return trunc(x+0.5)
}
/*
* round a number to the given precission
*/
define roundto(x, d) {
auto t, tmp_scale
tmp_scale=scale(sqrt(2))
scale=d
t=round(x*(10^d))/(10^d)
scale=tmp_scale
return t
}
/*
* twelve root of 2
*/
r12of2 = e(l(2)/12)
/*
* frequency for a piano key
* Note: freq(0) = A(-2)
*/
define freq(x) {
return 6.875*(r12of2^x)
}
/*
* print the list of the 128 MIDI freqs
* from C(-2) to Ab(10)
*/
for(i=3; i<131; i++) {
trunc(roundto(freq(i), 3)*1000)
}
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