[Reinhold H.]

Here is a short summary of the memory analysis which I did with David off-line. In addition to Notation Software Synth the configuration is that the VirtualMIDISynth from Coolsoft is used. Both software synths use very large soundfonts.

The design of CoolSoft has been that CoolSoft hooks into Windows. When starting Composer Windows adds all CoolSoft libraries and soundfonts to the load of Composer into the memory. Composer as a Windows app gets huge because of this architecture.

Because of this issue CoolSoft has redesigned their architecture and released a new version 2.1.0 on Oct. 31st, 2017. With this new version the VirtualMIDISynth from CoolsSoft is a separate application. Composer communicates to this software synth similar to the MicroSoft GS WaveTable Synth. Composer's memory allocation is normal now and no issue happens anymore for a PDF export.

In a nutshell: those who still want to use CoolSoft in addition to Notation Software Synth, please upgrade CoolSoft to the latetst version 2.1.0 or higher.

When using CoolSoft, please be aware that CoolSoft requires a significant amount of PC performance. On our test PC, Notation Software Synth required 3% where CoolSoft uses 13% PC performance in idle state.

We therefore recommend to only use CoolSoft if you really need this additional synthesizer.

Reinhold