I'd like to report a reproducible bug in Vocal Colors affecting Expression knob state recall. It occurs in every DAW I've tested and across multiple versions of Kontakt and Vocal Colors, and it makes the instrument unreliable for scoring work.
I have recreated this on multiple computers using different versions of kontakt 7 and 8 and different versions of Cocal Colors (including the most recent of all programs).
SUMMARY
After saving and reopening a DAW session, the Expression knob displays the correct saved value, but the audio engine does not reflect it. The instrument plays back at the 50% default until the knob's value actually changes.
STEPS TO REPRODUCE
- Load Vocal Colors in Kontakt in Ableton Live.
- Set the Expression knob to a value clearly different from the 50% default.
- Save and close the session.
- Reopen the session and play MIDI into the instrument.
EXPECTED: playback reflects the saved Expression value shown on the knob.
ACTUAL: playback reflects the 50% default. The knob displays the saved value the entire time. Nudging the knob by any amount immediately corrects the sound.
KEY DIAGNOSTIC FINDING
The fault appears to be specific to host session-state restore, not to Kontakt's state handling generally:
- Reloading a Kontakt snapshot after opening the session DOES apply the Expression value correctly. So Kontakt's snapshot-load path syncs the engine, while the host state-chunk restore path does not.
- Host automation on the Expression parameter only corrects the sound if the playhead physically passes over a value CHANGE. Starting playback after that point plays the 50% default, even though the automation lane holds the correct value there. This suggests the engine sync happens only inside the knob's change callback and is never run when state is restored.
ALREADY RULED OUT
- Not MIDI-related: removing the default CC1 assignment from the Expression knob does not change the behavior.
- Not DAW-specific: identical behavior in Ableton Live and Pro Tools.
- Not version-specific: reproduces in Kontakt 7 and Kontakt 8, and across multiple Vocal Colors and DAW versions. All software fully updated.
IMPACT
Any session containing Vocal Colors reopens sounding wrong, with no visual indication that anything is off — the knob shows the correct value. This is a particular risk for offline bounces and stem delivery, where the incorrect sound can be printed without ever being heard.
I'm happy to supply a screen recording or a test session on request.
