On Thu, Oct 16, 2014 at 11:42 AM, Phil CM <philcm@gnu.org> wrote:

Is there a way to retrieve this info (and others, ideally) from the host, thus removing the need for a "midi channel" control port?

I think you're confused. The host doesn't put a plugin on a MIDI channel. It delivers MIDI events to the plugin which might be on any channel.

Also, is there a way to tie the "volume" controller of the host (in Qtractor's case, the volume fader of the mixer strip) to one "volume" control port of the plugin, thus removing the need for the "control mode" control port ?

Absolutely not. Except via an extension to LV2 which both the host and plugin would have to support.