"Can I group cmus speakers with other brands in Home Assistant?"

"In many cases, yes. Home Assistant supports multi-room audio grouping across compatible platforms. However, cross-brand grouping often has sync limitations. A managed setup tests and tunes speaker groups to minimize audible delay."

"Can Home Assistant play announcements through cmus speakers?"

"Yes. Home Assistant can send TTS (text-to-speech) announcements to cmus speakers, including the ability to duck current music, play the announcement, and resume. This works for doorbell alerts, security warnings, or custom notifications."

"Will cmus still work with its native app alongside Home Assistant?"

"Yes. Most media integrations coexist with the manufacturer's app. You can start music from the cmus app and Home Assistant will still see the playback state. However, simultaneous control from both can sometimes cause conflicts."

cmus & Home Assistant

Audio & Media

cmus integrates with Home Assistant to create a unified multi-room audio and media system. Control playback, volume, and grouping from the dashboard. Build automations that play announcements, stream music, or silence media based on time, presence, or events.

With cmus connected to Home Assistant, your media devices work together regardless of brand. Group speakers across rooms for whole-home audio, route announcements to specific zones, or automatically pause playback when someone starts a video call.

Local control No cloud required

HA Documentation

How cmus Works with Home Assistant

Getting cmus connected to Home Assistant and running reliably.

1

Discover & connect

Home Assistant discovers cmus media devices on your network automatically. Add them to see playback controls, volume, source selection, and grouping options.

2

Multi-room audio

Group cmus speakers with devices from other brands for synchronized whole-home audio. Control each room independently or as zones.

3

Event-driven media

Build automations that play specific audio based on events — doorbell rings, morning alarms, or custom announcements. Route different media to different rooms.

Common cmus Issues

The problems installers run into with cmus and Home Assistant — and how a managed setup prevents them.

Audio sync issues across rooms

Grouping cmus speakers with different brands often results in noticeable audio delay between rooms. Even small sync differences (>20ms) are jarring. This requires careful network configuration.

Source switching conflicts

When multiple automation rules try to control cmus media simultaneously — morning routine starts music while a doorbell announcement fires — the results are unpredictable.

Network discovery failures

cmus devices rely on mDNS/SSDP for discovery. Misconfigured VLANs, firewalls, or IGMP snooping settings silently break discovery, making devices disappear from Home Assistant.

Volume normalization

Different cmus speakers at the same volume percentage produce very different actual loudness levels. Without calibration, automations that set volume to 30% may whisper in one room and blast in another.