@kudos2jen -- is your setup using a 5-channel audio-receiver, to power external speakers?
Shaw equipment <-- HDMI cable --> Receiver <-- HDMI cable --> HDMI-input on TV ?
Or, Shaw equipment <-- HDMI cable --> HDMI-input on TV --> sound-bar connected to TV's "audio-output" ?
Could the "volume" setting on the Receiver have been lowered?
Could the "volume" setting on your sound-bar have been lowered?
Have you tried disconnecting the electrical power from the Shaw equipment, waiting a few seconds, reconnecting the power, and wait for it to completely restart?