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- 10. _S_y_n_t_h_e_s_i_z_e_r__P_a_n_e_l
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- 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.
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- 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.
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- 10.1 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s
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- 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.
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- +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.
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- +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.
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- +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.
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- 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.
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- +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.
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- +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.
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- 10.2 _B_u_g__F_i_x_e_s
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- +o The General MIDI Preset Mode menu item now sends the
- correct MIDI message to any GM-compatible device.
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- +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.
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- 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
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- +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.
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- +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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