$  cat /etc/timidity++.cfg 
dir /usr/share/soundfonts
source fluid3gm.cfg
trysource fluid3gs.cfg
source fluid_altassign.cfg

$  cat /etc/timidity.cfg  
# Bank name:  Fluid R3 GM
# Date:       Feb 24. 2008
# Made by:    Frank Wen
# Target:     SBAWE32
# Copyright:  Frank Wen 2000-2002, 2008; Toby Smithe 2008
# Tools:      SFEDT v1.28:SWAMI v0.9.4

bank 0 #N /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0
        0 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/YamahaGrandPiano     # 9 velocity ranges, stereo
        1 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/BrightYamahaGrand    # 9 velocity ranges, stereo
        2 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/ElectricPiano        # 10 velocity ranges
        3 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/HonkyTonk    # 9 velocity ranges, stereo
        4 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/RhodesEP     # 9 velocity ranges, stereo
        5 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/LegendEP2    # 9 velocity ranges, stereo
        6 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/Harpsichord  # 9 velocity ranges
        7 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/Clavinet     # 9 velocity ranges
        8 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/Celesta      # 9 velocity ranges, stereo
        9 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/Glockenspiel # 9 velocity ranges
        10 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/MusicBox    # 9 velocity ranges
        11 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/Vibraphone  # 9 velocity ranges, stereo
        12 /usr/share/soundfonts/fluid-soundfont-lite-patches/FluidR3_GM-B0/Marimba     # 9 velocity ranges, stereo

 [lots similar lines not pasted]