Package: timidity
Version: 2.13.2-25
Severity: normal
Tags: patch
When Fluid soundfonts are installed, configuration files are installed to the
Timidity directory. These have correct
(for Timidity) values on all the "pan=" statements, with 0 signifying "centre".
For the drum kits, each "note" usually has a pan
value to place the drum in the correct stereo location. (Other instruments are
usually centred.)
However, timidity plays the drums panned about 80% to one side, even if they
are set to 0, or the keyword "center".
I THINK this is a bug in the internals of Timidity. Internally, panning values
are coded 0 (left) - 64 (centre) - 127 (right).
In file instrum.c the expression "pan = ((int) bank->tone[prog].pan & 0x7f) -
64 ;" appears, which is converting a 0..127 value
to +/-64, which seems wrong.
When I remove the minus 64 and recompile, drums appear in the correct stereo
positions.
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.30-thinkpad (PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages timidity depends on:
ii freepats 20060219-1 Free patch set for MIDI audio synt
ii libasound2 1.0.19-1 shared library for ALSA applicatio
ii libaudio2 1.9.1-2 Network Audio System - shared libr
ii libc6 2.9-18 GNU C Library: Shared libraries
ii libesd0 0.2.36-3 Enlightened Sound Daemon - Shared
ii libflac8 1.2.1-1.2 Free Lossless Audio Codec - runtim
ii libice6 2:1.0.4-1 X11 Inter-Client Exchange library
ii libjack0 0.116.1-4 JACK Audio Connection Kit (librari
ii libncurses5 5.6+20080308-1 Shared libraries for terminal hand
ii libogg0 1.1.3-4 Ogg Bitstream Library
ii libpng12-0 1.2.15~beta5-3 PNG library - runtime
ii libsm6 2:1.0.3-1+b1 X11 Session Management library
ii libvorbis0a 1.2.0.dfsg-5 The Vorbis General Audio Compressi
ii libvorbisenc2 1.2.0.dfsg-5 The Vorbis General Audio Compressi
ii libx11-6 2:1.2.1-1 X11 client-side library
ii libxaw7 2:1.0.4-1 X11 Athena Widget library
ii libxext6 2:1.0.4-1 X11 miscellaneous extension librar
ii libxmu6 2:1.0.4-1 X11 miscellaneous utility library
ii libxt6 1:1.0.5-3 X11 toolkit intrinsics library
ii lsb-base 3.2-20 Linux Standard Base 3.2 init scrip
ii zlib1g 1:1.2.3.3.dfsg-11 compression library - runtime
timidity recommends no packages.
Versions of packages timidity suggests:
ii fluid-soundfont-gm 3.1-2 Fluid (R3) General MIDI SoundFont
ii fluid-soundfont-gs 3.1-1 Fluid (R3) General MIDI SoundFont
ii pmidi 1.6.0-4 A command line midi player for ALS
-- no debconf information
--- instrum.c 2009-07-08 16:32:06.000000000 +0100
+++ instrum.c.old 2004-05-30 22:48:11.000000000 +0100
@@ -1070,7 +1070,7 @@
}
/* panning */
if (ip != NULL && bank->tone[prog].pan != -1) {
- pan = ((int) bank->tone[prog].pan & 0x7f) ; /* sg - 64; */
+ pan = ((int) bank->tone[prog].pan & 0x7f) - 64;
for (i = 0; i < ip->samples; i++) {
panning = (int) ip->sample[i].panning + pan;
panning = (panning < 0) ? 0
