Hi alsa-devel,
I'm programming a GUI for the mixer in my Focusrite Scarlett 6i6 interface. The Alsa driver supports that functionality, i.e. I can control the mixer using alsamixer, for example. Now I'm writing a Qt GUI for it.
I wonder how I can reliably identify a mixer control element (e.g. the master volume control). Each element has an ID (struct snd_ctl_elem_id), consisting of multiple elements: - numid (seems to change at each boot) - iface - device - subdevice - name (is always constant) - index The docs says I can identify an element by the combination of name and index.
My questions: 1) Are name and index enough to identify an element? 2) How can I obtain the index? The name and numid are shown by 'amixer contents', for example.
Kind regards, Tanjeff