This is summary of the new features that differ from the original version of Timidity (0.2i). You can see also here for details (written in japanese).

• Full module player
• Voices are automatically reduced if there is not enough machine power to play the MIDI file in real time.
• Sherry WRD
• NAS
• EsounD
• TiMidity server: Play the streamed MIDI in real time.
• Alternate assign.
• Expanded playlist files (.m3u, .pls, and .asx).
• Windows GUI
• configure
• Noise Shaping Filter [from Kunihiko Imai]
• WRD
• MOD
• KAR
• RCP
• 32 channels (recompiling, up to 256 channels)
• ump.so (UNIX Midi Plugin for Netscape Navigator)
• Load patch file while playing
• MIME (uu, base64, quoted-string, hqx)
• NetBSD
• IRIX 5.3/6.3 audio
• BSD/OS 2.0 Sound Blaster [from Keiichiro Yamate]
• New interfaces (Another curses version, VT100, X Athena Wiget[from Tomokazu Harada], Emacs, skin[from Daisuke Nagano])
• timidity.el: M-x timidity on Emacs
• Dynamic link interface
• Tck/Tk + trace mode [from Iwai Takashi]
• More efficient.
• Pre-calculated resampling cache
• /usr/local/share/timidity/timidity.cfg + ~/.timidity.cfg
• Reverb effects [from Masaki Kiyu]
• Yet another sound effect [from Shoji Matumoto]
• SoundFont [from Iwai Takashi]
• Read macintosh binary file [from Daisuke Aoki]
• Improvement for DEC(MMS) Audio
• Synchronization between audio and displaying.
• Pseudo surround effect
• Toggle pause
• Add utility programs: (lsmidiprog, lspatch.pl, mididump, patinfo)
• GS Drampart detection by SysEX [from Koyanagi Masaaki]
• GS Drampart detection by NRPN
• Can change drum part while playing
• Display sound spectrogram (Example: SoundSpectrogram.jpg, 146K)
• Accessing files via various protocols: http, ftp, news
• Extension instructions for *.cfg
• Pitch up/down while playing.
• Speed up/down while playing.
• Voices up/down while playing. (up to 256 polyphony)
• Add output of Sun Audio file(*.au) and AIFF file(*.aiff)
• Add output of G.711 A-Law
• Inflate implementation for *.gz
• Can play archive files: *.tar, *.tgz(tar + gzip), *.zip, *.lzh
• Lyrics (Meta: 5)
• Modulation Wheel (Control: 1)
• Mono/Poly channel (Control: 126/127)
• Channel Pressure (Status: 5, Enable the option with -Es)
• Portamento (Control: 5)
• SysEx: Master Volume (GS/GM)
• SysEx: Text Insert (Roland SC-series)
• SysEx: Random Panning (GS)
• SysEx: Key shift
• Drum Panning (NRPN:MSB=28)
• Data entry +/-1 (Control: 96/97)
• Vibrato (NRPN:MSB=1,LSB=8,9,10)
• Reverb Control Event (Control: 91)
• Chorus Control Event (Control: 93)
• Fine tuning (RPN 0,1), Coarse tuning (RPN 0,2)
• Japanese localization [from Daisuke Aoki]
• Improvements in ncurses [from Daisuke Aoki]
• Use pager program specified by PAGER Environment.