Function setChannelVolume

src/Audio/src/AudioEngine.cpp:448–459

    // Channel volume control

    void setChannelVolume(ChannelId channel, int32_t volume)
    {
        _channelVolumes[static_cast<size_t>(channel)] = volume;

        for (auto& inst : _instances)
        {
            if (inst.active && (channel == ChannelId::master || inst.channel == channel))
            {
                applyVolume(inst);
            }
        }
    }

    int32_t getChannelVolume(ChannelId channel)
    {