Thank you algx, very clear, but what I mean about first question is that sometimes I find default tones with chorus, delay and reverb all at 127, that is not a good live set. So I would like to have an idea about which values it is better not to overcome, just for a starting point.
For the second question you have centered the point, but what I need is a practice example. In the case of an Alto sax, I found that a little choir in the background helps a little to swell the sound and I wish to put together just another tone, but I don't know wich one will sound better, maybe a triangle wave or a saw one? another one? Experimenting all the chances could be exhausting, so here again I would like to listen to an expert opinion.
Actually the third question is not very important, I am just curious to see what users think not to have in the PX5S... maybe a cup of coffee?