[LAD] Routing signals in mixer (Ardour, Qtractor)

[Jeremy Jongepier]

On 07/07/2010 11:32 AM, Jeremy Jongepier wrote:
> On 07/07/2010 09:49 AM, Louigi Verona wrote:
>> Hello!
>>
>> Both Ardour and Qtractor are capable sequencers. Ardour is getting midi
>> soon, Qtractor is getting automation. All of this is good news.
>>
>> I was wondering if the devs are interested in implementing routing
>> signals in a mixer as the next important priority. This would allow not
>> only effects chains which is usually very useful, but also usage of
>> vocoders.
>> At the moment it is impossible to use a vocoder plugin inside Ardour or
>> Qtractor.
>>
>> The beauty of vocoders is that they can be used not only on voice, but
>> as electronic instruments as well. I am often using them to create
>> beautiful textures, but in order for the result to be good,
>> I need to automate parameters of the vocoder. LADSPA Vocoder, for
>> instance, is capable of generating very beautiful sounds, but only if
>> you can change the bands in real time, fade the in and out.
>> Of course, sometimes it can be recorded live, but in many cases it needs
>> to be automated and stored in a project.
>>
>> Tell me what you think.
>>
> 
> Hello Louigi,
> 
> I think it can already be done:
> - In Qtractor create four tracks with corresponding buses: synth
> (stereo), carrier (mono), vocoder (3 channels) and vocoder-mix (stereo)
> - The vocoder track needs a corresponding bus with three channels, one
> for the carrier and one for the incoming signal
> - Have all tracks output their signal to their corresponding buses,
> except for vocoder-mix of course, have it output to the Master output bus
> - Load the vocoder LADSPA plugin into the vocoder track. I don't know
> which input is the carrier and which one the stereo input but I think
> you'll figure that out yourself
> - Make the connections in QjackCtl's or Qtractor's Connections window:
> connect the synth output bus ports to the vocoder input bus ports and
> connect the carrier output bus port to the third vocoder input bus port.
> Then connect two of the vocoder output bus ports (the ones that output a
> signal, one of the outputs will be silent I guess) to the vocoder-mix
> input bus ports.
> 
> Not sure if it works, but I managed to set up a similar effect chain
> when it comes to using sidechain compression in Qtractor with the SC3
> LADSPA compressor
> (http://linux.autostatic.com/images/2010-07/sidechain.ogg). Works like a
> charm so it should work with a vocoder plugin too.
> 
> Best,
> 
> Jeremy

Instead of carrier I meant formant of course :$

Jeremy