After two weeks trying to do at least what i was capable to do with other software made me think that i have a lot to learn and tweak here and there, but probably i'm too used to another logic.

Anyway I'm interested in that thing, i see some potential and i'd like to know how to buy something like an external usb audio interface, possibly ASIO compatible. I found some good cards but they are not mentioning asio at all.
Where to find a shop (europe) online to buy something ? in stores i never seen those things except for creative X-Fi Extreme, defined as a crap by many people in internet. 

I don't know which stores in Europe or deliver to Europe which have good soundcards.  check my website for soundcard recommenations and then do a search for those models on websites in Europe for those models.

I really don't think that this particular problem is caused by the soundcard myself.  try what I suggested above.

I tried to follow your suggestions but i've got following problems:
- when i add TTS automatically a track is added , but its settings are different than subsequent added midi tracks, and for some reason, i cannot associate the same fx as others and choose different outputs.
- A midi track have a lot of options, but not all that of TTS. 
- Creation of random clips are not related to TTS i fear. I cannot stop that happening sometimes.

It's true, in my opinion (i am a developer), that such events doesn't have any real relation with audio throughput. Resetting volumes and clips creation are logic events bound to adding a key, whatever the sound is going out from speakers or no output is set at all.

It has been a very long time since I used TTS.  When I did, I would start with one audio and one midi track.

I would insert TTS into the audio track's FX bin and then set the midi track output to the TTS input. 

More info on how I work with TTS is available on my website where I have a page on the recording software and how to set up TTS to work with one or more midi tracks. 

mizar


I tried to follow your suggestions but i've got following problems:
- when i add TTS automatically a track is added , but its settings are different than subsequent added midi tracks, and for some reason, i cannot associate the same fx as others and choose different outputs.
- A midi track have a lot of options, but not all that of TTS. 
- Creation of random clips are not related to TTS i fear. I cannot stop that happening sometimes.

It's true, in my opinion (i am a developer), that such events doesn't have any real relation with audio throughput. Resetting volumes and clips creation are logic events bound to adding a key, whatever the sound is going out from speakers or no output is set at all.

the only thing I can think of that would be "different" from other MIDI tracks would be if you chose (default, I think) a SIMPLE INSTRUMENT track when adding TTS-1 instead of a separate MIDI SOURCE and FIRST OUTPUT tracks.  when the dialog box pops up, don't choose SIMPLE INSTRUMENT TRACK - choose MIDI SOURCE TRACK and FIRST SYTNH OUTPUT tracks.
 

- A midi track have a lot of options, but not all that of TTS. 

I don't understand what you mean by that at all.  options available on MIDI tracks include INPUT, OUTPUT, CHANNEL, BANK, PATCH, VOLUME, GAIN, PAN, VELOCITY, CHORUS and REVERB (I don't think I've left anything out, but I'm not in front of my DAW, so I don't remember for certain).  All of those parameters DO apply to TTS-1 and any other General MIDI synth.  I'm not really sure what you're referring to that doesn't apply to TTS-1, you'll have to be more specific.

- Creation of random clips are not related to TTS i fear. I cannot stop that happening sometimes.

once again, this makes no sense, I really don't understand what you mean.  no random clips will be created just from inserting TTS-1.  where are the random clips coming from? 
 

It's true, in my opinion (i am a developer), that such events doesn't have any real relation with audio throughput. Resetting volumes and clips creation are logic events bound to adding a key, whatever the sound is going out from speakers or no output is set at all.

sorry, but I don't follow this either.  you'll need to be more specific with each of your statements because you're not being clear what you mean.  "resetting volumes and clips creation are logic events bound to adding a key." - I can't figure out what you mean by that at all.  adding what key?  and what do you mean by "clips creation"?  are you referring to recording MIDI using your keyboard?

Mizar,
 It's very possible that the instruments have already been set in your midi track as an event.
 If that is the case then once that event is executed, the track instrument will change to that value. I don't have MC6, but in MC4 there is an Event List where the midi events can be viewed and changed. Check to see if these events are listed for those midi tracks that you are having issues with going back to default settings. Same holds true for volume levels.