Muse Sounds Trombone dynamics too quiet

1. Create a full orchestra score with Muse Sounds instrumentation, with trombone parts included.
2. Use a variety of dynamic markings, particularly for the brass family, and trombones in particular.
3. Play back full texture, or select brass and play back, or select just trombone and play back

You will notice that the trombone part when the dynamic is set at piano barely sounds. When the dynamic is set at mezzo forte or forte, the bump in sound is negligible.

3. Open the Mixer and play back. You will see that the level for the trombone is drastically lower than the other instruments at the same dynamic level.

4. In the mixer, adjust the volume of the trombone part. The change in output and sound is negligible.

My workaround for this has been to switch back to MSBasic sounds for the trombones, because in this state the trombones are unusable for playback.