Why not? I don't know in Qtractor, but in Ardour you can do that... For the audio signals, even routing to their inputs mono outputs of other tracks (and/or system inputs), or by sends. And for the controls you have automations. I don't understand the problem... Best regards, Natanael.

Why not? I don't know in Qtractor, but in Ardour you can do that... For the audio signals, even routing to their inputs mono outputs of other tracks (and/or system inputs), or by sends. And for the controls you have automations. I don't understand the problem... Best regards, Natanael. Ardour does not see three inputs of, say, a LADSPA Vocoder. It sees only two. LADSPA Vocoder has three and you need three to create an effect.

L.V.

On Wed, Jul 7, 2010 at 1:07 PM, Natanael Olaiz <nolaiz(a)gmail.com> wrote: Ah, ok, now I guess I understood: one of the inputs is MIDI... But you can do the same using just audio signal inputs in the vocoder, and a simple synth with its output connected to one of the vocoder inputs. Right? No, it is not midi, it is audio. Two channels for carrier, one for the modifier (or vice versa, I forget).

Resp. the modifying signal is mono, but the manipulated signal is stereo in and stereo out?!

I GUESS in other words, mono in and stereo out ;)?!

So, is strange that Ardour only see 2 inputs... Can you send a link to the plugin that you are testing?

El 07/07/2010 11:25 AM, Louigi Verona escribió: You only have 2 audio inputs (formant and carrier)!!

Yep, I can even show everyone a screenshot - in fact, I was wrong to say that there is one stereo in and one mono in - there are actually two stereo ins.

the goal is to have ardour 3.0 able to do this by the end of next week, just FYI.

On 07/07/2010 09:49 AM, Louigi Verona wrote: 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

Ok, got it working in Qtractor: - In Qtractor I've created four tracks with corresponding buses: Formant Synth (1 channel), Carrier Voice (1 channel), Vocoder (2 channels) and Vocoder Mix (2 channels) - All tracks output their signal to their corresponding buses, except for Vocoder Mix which outputs to the Master output buses - Then I've loaded the vocoder LADSPA plugin into the Vocoder track. Input 1 of the Vocoder bus is the carrier and input 2 is the formant - After that I've made the following connections in Qtractor's Connections window: http://linux.autostatic.com/images/2010-07/vocoder-connections.png

On Wed, 2010-07-07 at 10:21 -0700, Niels Mayer wrote: That for audio this could be solved this way is known, even if Rui doesn't know it himself, but this isn't a good solution, if somebody wish to use several side chain effects is become to confusing. AFAIK the MIDI issue isn't solved. Setting up buses for MIDI isn't possible the way it is for audio, but I didn't use Qtractor since around two month anymore. I guess I'll make music using latest svn Version within the next days.

On Wed, Jul 7, 2010 at 1:21 PM, Niels Mayer <nielsmayer(a)gmail.com> wrote: just for the record, ardour3 in SVN can now do this. i'm not suggesting that anyone actually try it out yet, though, and anyway, i know of no plugins that can do this at present.

On Wed, 2010-07-07 at 20:39 +0200, Ralf Mardorf wrote: Btw. this could be done with Linux too, if there should be gates with side chain. Just copy an audio track, give this audio track an offset and only use it for the side chain, to gate the original track.

A good example of this would be using a fast on/off repeating "note" in midi to gate an existing signal -- to give that old school rave sound to synths

On Wed, Jul 7, 2010 at 1:21 PM, Niels Mayer <nielsmayer(a)gmail.com> wrote: just for the record, ardour3 in SVN can now do this. i'm not suggesting that anyone actually try it out yet, though, and anyway, i know of no plugins that can do this at present. the only limitation on mixed midi/audio signal flow in ardour 3.0 will be that there is only 1 datatype *leaving* a track. mixed inputs and mixed data within a track (or bus)'s processing flow are fine. --p _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev

Ok, got it working in Qtractor: - In Qtractor I've created four tracks with corresponding buses: Formant Synth (1 channel), Carrier Voice (1 channel), Vocoder (2 channels) and Vocoder Mix (2 channels) - All tracks output their signal to their corresponding buses, except for Vocoder Mix which outputs to the Master output buses - Then I've loaded the vocoder LADSPA plugin into the Vocoder track. Input 1 of the Vocoder bus is the carrier and input 2 is the formant - After that I've made the following connections in Qtractor's Connections window: http://linux.autostatic.com/images/2010-07/vocoder-connections.png

Hello Louigi, You can output the Vocoder output to the Master outputs but then you cannot adjust the volume and panning within a single track. Also, if you have multiple tracks with sidechaining like the vocoder example it can get quite inconvenient. Best, Jeremy _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev

- In Qtractor I've created four tracks with corresponding buses: Formant Synth (1 channel), Carrier Voice (1 channel), Vocoder (2 channels) and Vocoder Mix (2 channels) - All tracks output their signal to their corresponding buses, except for Vocoder Mix which outputs to the Master output buses - Then I've loaded the vocoder LADSPA plugin into the Vocoder track. Input 1 of the Vocoder bus is the carrier and input 2 is the formant - After that I've made the following connections in Qtractor's Connections window: http://linux.autostatic.com/images/2010-07/vocoder-connections.png Best, Jeremy

Okay, last message for today. Eventually I could partially reproduce. If I create a stereo Vocoder track FIRST, then the latter mono carrier and modifier tracks would channel into Vocoder provided I press "monitor" on it. But the output is a weird mix of vocoded signal and the modifier. If I change modifier and carrier places - the signal does not change. Why would track creation matter I do not know. Rui? Also, when Vocoder does not receive anything, it starts to generate XRUNs, so if you close Qtractor while Vocoder is activated, Qtractor will freeze. All in all, I am puzzled why Jeremy could do it, but not me. I hope I am just missing a simple detail.

So I see. But I am still interested in how he did what he reported since I still cannot get his scheme to work. ------------------------------------------------------------------------

problem is that input buffers are always read before any output signal is produced, while on the same process period cycle. iow, you're consuming what hasn't been produced yet. that's why you'll probably get silence, at best.

i think that's the "zero-copy" optimization that jack pursues when ports are single connected?

Louigi Verona wrote: The reason why you get a mixed signal could be because you use both outputs of the Vocoder track. The vocoder LADSPA plugin outputs the dry signal on the second output and the vocoded signal on the first output. That's why I connected the first output of the Vocoder track to both inputs of the Vocoder Mix track, like this you have faux-stereo and better control over the output of the Vocoder track.

Also, when Vocoder does not receive anything, it starts to generate XRUNs, The more bands you select in the vocoder LADSPA plugin, the more CPU it takes, so bigger chance for xruns. I didn't thoroughly test this setup yet so it might be something else.

Best, Jeremy _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev

Louigi Verona wrote: I'll recheck too, I did bring all the necessary stuff on vacation (MIDI keyboard, external soundcard, mics, etc.) but didn't have the time to set it up yet. Best, Jeremy

Your thinking of "Denormal" numbers. http://en.wikipedia.org/wiki/Denormal_number A nice "quick" fix for these is: if ( number < 0.000000001)       number = 0.0; ;-)