eArc Connected Sound Bar Volume

[Luke240]

It seem as though when an eArc sound bar is connected to the tv I'm unable to control its volume, aside from mute.
When the sound bar is not connected though I'm able to control as expected.

[crissmil]

same here.
@Luke240 did u find anything about this issue?

[asturel]

Just run into the same issue, used ls-monitor to debug which luna call happen when I increase/decrease the volume via MR:

17454.780 TX call 97 com.webos.platformstarfish (l2iPJwg6) com.webos.service.audio (JGZ7eyNQ) (null) /master/volumeUp «{}»

so we can use
ssap://audio/volumeUp
ssap://audio/volumeDown
ssap://audio/getVolume also get called when volume adjusted.

{
        "virtualService": "audio",
        "version": 1,
        "methods": [
                {
                        "path": "/getVolume",
                        "provider": "com.webos.service.audio/master/getVolume"
                },
                {
                        "path": "/setVolume",
                        "provider": "com.webos.service.audio/master/setVolume"
                },
                {
                        "path": "/volumeUp",
                        "provider": "com.webos.service.audio/master/volumeUp"
                },
                {
                        "path": "/volumeDown",
                        "provider": "com.webos.service.audio/master/volumeDown"
                },
                {
                        "path": "/getMute",
                        "provider": "com.webos.service.apiadapter/audio/getMute"
                },
                {
                        "path": "/setMute",
                        "provider": "com.webos.service.apiadapter/audio/setMute"
                },
                {
                        "path": "/getStatus",
                        "provider": "com.webos.service.apiadapter/audio/getStatus"
                },
                {
                        "path": "/changeSoundOutput",
                        "provider": "com.webos.service.apiadapter/audio/changeSoundOutput"
                },
                {
                        "path": "/getSoundOutput",
                        "provider": "com.webos.service.apiadapter/audio/getSoundOutput"
                }
        ]
}
{
        "service": "com.webos.service.audio",
        "methods": [
                {
                        "path": "/tv/setOffsetDelay",
                        "description": "Set av sync delay",
                        "requiredPermissions": [
                                "CONTROL_AUDIO"
                        ]
                },
                {
                        "path": "/master/getVolume",
                        "description": "Get the volume.",
                        "requiredPermissions": [
                                "CONTROL_AUDIO"
                        ]
                },
                {
                        "path": "/master/setVolume",
                        "description": "Set the volume.",
                        "requiredPermissions": [
                                "CONTROL_AUDIO"
                        ]
                },
                {
                        "path": "/master/volumeUp",
                        "description": "Increase the volume.",
                        "requiredPermissions": [
                                "CONTROL_AUDIO"
                        ]
                },
                {
                        "path": "/master/volumeDown",
                        "description": "Decrease the volume.",
                        "requiredPermissions": [
                                "CONTROL_AUDIO"
                        ]
                }
        ]
}
{
        "service": "com.webos.service.btaudiosnk",
        "methods": [
                {
                        "path": "/open",
                        "description": "Enable BT Sound Share feature",
                        "requiredPermissions": [
                                "CONTROL_BLUETOOTH"
                        ]
                },
                {
                        "path": "/close",
                        "description": "Disable BT Sound Share feature",
                        "requiredPermissions": [
                                "CONTROL_BLUETOOTH"
                        ]
                },
                {
                        "path": "/getState",
                        "description": "Get status of BT devices",
                        "requiredPermissions": [
                                "CONTROL_BLUETOOTH"
                        ]
                },
                {
                        "path": "/disconnect",
                        "description": "To disconnect the bluetooth device connected to TV",
                        "requiredPermissions": [
                                "CONTROL_BLUETOOTH"
                        ]
                }
        ]
}