syntax = "proto3"; package music.v1alpha1; message GetMuteRequest {} message GetMuteResponse {} message SetMuteRequest {} message SetMuteResponse {} message GetVolumeRequest {} message GetVolumeResponse {} message SetVolumeRequest {} message SetVolumeResponse {} service MixerService { rpc GetMute(GetMuteRequest) returns (GetMuteResponse) {} rpc SetMute(SetMuteRequest) returns (SetMuteResponse) {} rpc GetVolume(GetVolumeRequest) returns (GetVolumeResponse) {} rpc SetVolume(SetVolumeRequest) returns (SetVolumeResponse) {} }