[ardour-dev] Ardour session state objects

John Emmas johne53 at tiscali.co.uk
Tue Jul 3 03:14:53 PDT 2007

Just to add to yesterday's question....

An "IO" node (in the .ardour XML file) looks something like this:-

<IO  name="Audio 1"  id="NN"  output-connection="Master Out"  inputs="{}{}"
            gain="1.000000000000"  iolimits="0,0,-1,-1">

The values for "iolimits" seem to be integers in the range -1 up to 2 but
I've no idea what the different integers mean.  Can anyone explain what I'd
need to set them to?  Also, for a "master" IO node (i.e. one representing
the Master Output) how would I know where to route it?  For example, in my
setup, my master node's output looks like this:-

output-connection="out 1+2"

but in some samples that other people sent me, it looked like this


What is the safest assumption to use - or isn't it important?

Finally, can someone explain what the "Click" node is for - and why it
contains panning, automation, gain etc?



----- Original Message -----
From: "John Emmas" <johne53 at tiscali.co.uk>
To: "ardour dev" <ardour-dev at lists.ardour.org>
Sent: 02 July 2007 10:30
Subject: [ardour-dev] Ardour session state objects

> This is probably a question for Paul but someone else might know the
> answer....
> My AAF->Ardour conversion code is finally nearing completion but so far,
> it hasn't managed to produce an XML file that I can successfully load into
> Ardour.  One problem is that I need to create a master 'Route', as well as
> additional Routes corresponding (I think) to each AudioDiskstream.  As far
> as I can tell, the simplest Route consists of a Panner and a Gain control.
> Both of these contain something called an 'AutomationList' which looks
> something like this (inside the XML file):-
> <AutomationList  id="NN"  default="0"  min_yval="0"  max_yval="1"
>             max_xval="0"  state="off"  style="Absolute"/>
> The value for "default" is sometimes 0 and sometimes 1.  Similarly, the
> value for "max_yval" is sometimes 1 and sometimes 2.  Can anyone tell
> me what is the significance of these values?
> Thanks,
> John
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