This is by no means perfect and looks different than what was originally intended, but at least this doesn't totally fail to render properly with the OpenGL renderer.
Added full-panning stereo, improvement of channel management, and many other things.
Also, I have implemented an ability to use custom WOPL (for libADLMIDI) and WOPN (for libOPNMIDI) banks from the same path as "soundfonts", but also, in the same environment, the "fm_banks" folder was added for WOPL/WOPN storing purposes.
To toggle usage of embedded or custom bank, I have added togglable booleans. When bank fails to be loaded, the default embedded bank is getting to be used as fallback.
ADLMIDI 1.4.0 2018-10-01
* Implemented a full support for Portamento! (Thanks to [Jean Pierre Cimalando](https://github.com/jpcima) for a work!)
* Added support for SysEx event handling! (Thanks to [Jean Pierre Cimalando](https://github.com/jpcima) for a work!)
* Added support for GS way of custom drum channels (through SysEx events)
* Ignore some NRPN events and lsb bank number when using GS standard (after catching of GS Reset SysEx call)
* Added support for CC66-Sostenuto controller (Pedal hold of currently-pressed notes only while CC64 holds also all next notes)
* Added support for CC67-SoftPedal controller (SoftPedal lowers the volume of notes played)
* Fixed correctness of CMF files playing
* Fixed unnecessary overuse of chip channels by blank notes
* Added API to disable specific MIDI tracks or play one of MIDI tracks solo
* Added support for more complex loop (loopStart=XX, loopEnd=0). Where XX - count of loops, or 0 - infinite. Nested loops are supported without of any limits.
* Added working implementation of TMB's velocity offset
* Added support for full-panning stereo option (Thanks to [Christopher Snowhill](https://github.com/kode54) for a work!)
* Fixed inability to play high notes due physical tone frequency out of range on the OPL3 chip
OPNMIDI 1.4.0 2018-10-01
* Implemented a full support for Portamento! (Thanks to [Jean Pierre Cimalando](https://github.com/jpcima) for a work!)
* Added support for SysEx event handling! (Thanks to [Jean Pierre Cimalando](https://github.com/jpcima) for a work!)
* Added support for GS way of custom drum channels (through SysEx events)
* Ignore some NRPN events and lsb bank number when using GS standard (after catching of GS Reset SysEx call)
* Added support for CC66-Sostenuto controller (Pedal hold of currently-pressed notes only while CC64 holds also all next notes)
* Added support for CC67-SoftPedal controller (SoftPedal lowers the volume of notes played)
* Resolved a trouble which sometimes makes a junk noise sound and unnecessary overuse of chip channels
* Volume models support taken from libADLMIDI has been adapted to OPN2's chip speficis
* Fixed inability to play high notes due physical tone frequency out of range on the OPN2 chip
* Added support for full-panning stereo option
ADL&OPN Hotfix: re-calculated default banks
The fix on side of measurer of OPL3-BE and OPN2-BE where some instruments getting zero releasing time.
Although this doesn't look as good as the PCF version it is a lot less calculation intensive and therefore more suitable for weaker hardware.
It also tends to bleed through walls a lot less.
These were caused by some bogus comment in the original compatibility.txt which erroneously added a "SPAC_PCross" remark to a line which actually set "SPAC_Cross".
