Speech-Dispatcher audio crackle

[LeeReitz]

Distribution (run cat /etc/os-release):
Pop!_OS 19.10

Related Application and/or Package Version (run apt policy $PACKAGE NAME):
speech-dispatcher:
Installed: 0.9.1-2
Candidate: 0.9.1-2
Version table:
*** 0.9.1-2 500
500 http://us.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
100 /var/lib/dpkg/status

Issue/Bug Description:
Audio cracking when speech-dispatcher spawns instances. Cracking is fixed by killing all instances of speech-dispatcher. Process names include sd_dummy, sd_espeak-ng, sd_generic. Known issue with speech-dispatcher (found several forums with similar issues on different distros).

Steps to reproduce (if you know):
Using an eGPU (razer core) with dual monitors, headphones and speakers plugged into each monitor. Switching audio output from monitor 1 to monitor 2 sometimes causes speech dispatcher to spawn.

Expected behavior:
No audio crackle

Other Notes: