Re: [Qtractor-devel] Can't get more than 1 LinuxSampler track to work in Qtractor

[Rui N. C. <rn...@rn...>]

On 12/12/2016 09:26 PM, Frank Neumann wrote:
> 
> Hi Rui and all,
> 
>>> not sure who is at fault here (likely me :-), but maybe some from the Qtractor
>>> community can help..I am trying to set up a simple session with Qtractor and
>>> LinuxSampler: 2 MIDI tracks, each holding an instance of LinuxSampler (LV2) as a
>>> plugin. When I attempt to load an .sfz file into the 2nd instance, I get an error message:
>>>
>>> The audio output device 'Plugin' cannot be dropped from this sampler channel!
>>> The MIDI input port 'Plugin' cannot be altered on this sampler channel!
>>>
>>> Let me describe what I am doing, step by step:
>>>
>>> - Start QJackctl, start JACK, start Qtractor
>>> - Qtractor: Create new track, type MIDI, add plugin -> LV2 -> LinuxSampler, confirm with ok
>>> - Start QSampler, click on that track, "Setup channel", select SFZ engine and some .sfz file, confirm with ok
>>>   MIDI Input Type is "Plugin", Device: MIDI Plugin Device 0
>>>   Audio Output Type is "Plugin", Device: Audio Plugin Device 0
>>> - Qtractor: Connect MIDI keyboard to Qtractor, play into that track 
>>>
>>> = all fine so far =
>>>
>>> - Qtractor: Create another track, again type MIDI, add plugin -> LV2 -> LinuxSampler, confirm with ok
>>> - In QSampler, click on that track, "Setup channel", select SFZ engine and some other .sfz file, confirm with ok
>>>   -> at this point QSampler says "Channel 1  Some channel settings could not be set.  Sorry."
>>>      and in Qtractor's console I see:
>>>      Starting disk thread...OK
>>>      EQ support: no
>>>      Stopping disk thread...OK
>>>      Starting disk thread...OK
>>>      EQ support: no
>>>      The audio output device 'Plugin' cannot be dropped from this sampler channel!
>>>      The MIDI input port 'Plugin' cannot be altered on this sampler channel!
>>>
>>>      though it then continues to say:
>>>      ...
>>>      Instantiating LADSPA effect 'triplePara'.
>>>      LADSPA effect 'triplePara' activated.
>>>      Scheduling '/tmp/x/wa_synth_drums/drum kits/sfz/z_all percussion dissonant hits.sfz' (Index=0) to be loaded in background (if not loaded yet).
>>>      Loading sfz file '/tmp/x/wa_synth_drums/drum kits/sfz/z_all percussion dissonant hits.sfz'...OK
>>>      Loading sfz instrument ('/tmp/x/wa_synth_drums/drum kits/sfz/z_all percussion dissonant hits.sfz',0)...OK
>>>      Caching initial samples...OK
>>>
>>> Net effect is still that on this new track no audio is being played out. The
>>> first track continues to work fine.
>>>
>>> Used versions:
>>> - Qtractor 0.8.0 (built from Git on Dec 6th)
>>> - libgig, liblscp, linuxsampler, qsampler built from today's svn state
>>>
>>> Have I misunderstood something about how tracks and channels of Linuxsampler
>>> are supposed to work from within Qtractor? Do I need to change something in
>>> Qsampler before confirming the properties of a new channel?
>>>
>>
>> you probably missed the little secret part that MIDI channel numbers
>> must match each other, between qtractor MIDI tracks and corresponding
>> linuxsampler sampler channels.
>>
>> from the above you say nothing about which MIDI channel you set up the
>> second linuxsampler channel, which by default gets to MIDI channel 1
>> while a second MIDI track in qtractor, most probably, gets to number 2.
> 
> Oops, sorry for not stating that info. Yes, you are right, I used the "default"
> in LinuxSampler/qsampler which is channel 1. However, even if I change it to the
> same channel number (2 in this case) of the corresponding Qtractor track, the error
> is still there:
> 
> 22:21:46.876 Channel 1 setup...
> 22:22:21.677 Channel 1 lscp_set_channel_audio_device: The audio output device 'Plugin' cannot be dropped from this sampler channel! (errno=100)
> 22:22:21.682 Channel 1 lscp_set_channel_midi_device: The MIDI input port 'Plugin' cannot be altered on this sampler channel! (errno=100)
> 22:22:21.686 Channel 1 MIDI port: 0.
> 22:22:21.688 Channel 1 MIDI channel: 1.
> 22:22:21.746 Channel 1 Engine: SFZ.
> 
> What's a little irritating is that above it still says "MIDI channel: 1." but I
> guess Qsampler/LinuxSampler is starting to count from 0 since channel 3 would
> appear as "2" there.
> 
> However, still no luck so far :-\. Does this kind of setup work for you?
> 

yes, it works, and sounds, as advertised, despite the same "error"
messages as yours

i'm out of ideas now

byee
-- 
rncbc aka. Rui Nuno Capela
rn...@rn...



-- 
rncbc aka. Rui Nuno Capela
rn...@rn...