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IRIX Installation Tools & Overlays 2004 February
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SGI IRIX Installation Tools & Overlays 2004 February - Disc 2.iso
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2004-01-09
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10. _S_y_n_t_h_e_s_i_z_e_r__P_a_n_e_l
The Synthesizer Panel (invoked from the command line as
_s_y_n_t_h_p_a_n_e_l(_1)) provides a graphical control panel interface
for monitoring the status of the software MIDI synthesizer,
for manually changing preset banks and presets on each of
its 16 channels, and for adjusting a number of its global
and per-channel control parameters. It should be noted the
the new 2.0 version of this application is not compatible
with older versions of the MIDI synthesizer (see the release
notes in Chapter 9). The new versions of both which are
contained within this release should be used together.
The MIDI synthesizer and its related applications, including
this tool, are installed from the optional subsystem
_d_m_e_d_i_a__e_o_e._s_w._s_y_n_t_h. To enable General MIDI synthesis, it
is also necessary to install the subsystem
_d_m_e_d_i_a__e_o_e._d_a_t_a._s_y_n_t_h, which contains a full set of General
MIDI presets for the synthesizer.
10.1 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s
This section lists changes/additions to Synthesizer Panel
since the IRIX 6.3/6.4 _P_C_I _A_u_d_i_o _O_p_t_i_o_n _s_u_p_p_o_r_t + _g_e_n_e_r_a_l
_a_u_d_i_o _a_n_d _M_I_D_I _s_y_n_t_h_e_s_i_z_e_r _b_u_g-_f_i_x_e_s patch.
+o A new pop-up panel (invoked from the Options->Synth
Startup Configuration... menu item) allows users to
customize the software MIDI synthesizer's behavior via
its startup file. This allows customizing of
parameters such as the number of audio output channels,
the audio output port, the maximum CPU usage, the
default GM preset bank path, and several others.
+o The "Reverb + Tune" pop-up panel has been renamed "Run
Time Parameters", and is invoked from the Options-
>Synth Runtime Parameters... menu item. It now
includes a set of controls for customizing the new MIDI
synthesizer Chorus algorithm (see the release notes in
Chapter 9). In addition, a new reverb control "Global
Reverb Level" has been added to allow reverberation to
be added to all midisynth channels. This was needed
now that reverberation levels are set on a channel-by-
channel basis using the standard GM/GS MIDI
controllers.
+o A new Synth System Reset menu command has been added
which allows you to reset midisynth to its startup
state. This includes purging of all loaded preset
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banks, presets, and sample files. All subsequent file
loads will reuse that memory space, preventing runaway
growth of the midisynth processes.
This section lists changes/additions to Synthesizer Panel
between the IRIX 6.4/6.4 release and the above-mentioned
patch.
+o A new panel has been added which contains eight drop
pockets for specifying alternate preset banks to be
used by the MIDI synthesizer. This panel is hidden by
default, and may be displayed by pressing the "show
banks" button.
+o The volume and expression display has been modified to
match the new functionality: According to the MIDI
specification, the total volume for a channel is
determined by the formula: gain = (channel volume *
expression) / (127 * 127). The old, incorrect formula
added the two, limited the result to 127, then divided
by 127. This caused most of the range to be unusable.
+o The preset display panel now displays the "Preset Name"
field from the preset file, rather than creating a name
by truncating the name of the preset file. This allows
more elaborate preset names with embedded spaces, etc.
10.2 _B_u_g__F_i_x_e_s
+o The General MIDI Preset Mode menu item now sends the
correct MIDI message to any GM-compatible device.
+o All Notes Off, All Sound Off, and Reset All Controllers
MIDI messages now generate a channel LED flash for only
the channel on which they occur. Earlier versions
flashed all channels.
10.3 _K_n_o_w_n__P_r_o_b_l_e_m_s__a_n_d__W_o_r_k_a_r_o_u_n_d_s
+o If a preset bank file load fails for any reason, and no
previous bank file had been loaded in the drop pocket,
a "nonexistent file" icon (looks like an oval) will be
left showing in the pocket. This is harmless, and
should be ignored.
+o Whenever a preset is loaded from a preset bank file
(such as a SoundFont2 bank) as opposed to from a bank
directory, its icon will show as the "nonexistant file"
image rather than the expected Synth Preset icon. This
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is also harmless.