1.how to change default 4 measures sampling.it says it can go up to 99 measures.bit I didnt find it in manual how to change it
2.I got roland mc-307,I wanna use 404sx effects on it, but only for example part 2 on my roland.how?

1. When you are in the pattern record section (pattern record button needs to be lit) you can change the measure length by pressing the "length" button and turning "ctrl knob 3" to the right.

2. You can not assign the 404 fx to individual tracks on the mc307. You can use the 404 fx on everything coming out of the 307. Make sure the audio out on the 307 is going to the RCA inputs on the 404. Press the "ext source" button on the 404. Hold the "remain" button on the 404 and select the "ext source button" if it's not already lit. This will apply the 404 fx to the incoming audio.

thanks for help.well I already know about applying effects on all tracks,but not be able to put it on single track is big dissapointment
404sx has midi in, what can I do if I connect my 307 midi out to 404sx midi in.thanks in advance.