posted 12 November 2001 21:30            

I have a queery re the MotorMix - I have noticed that I get a buzz in my audio path when the MotorMix is connected to the Capy. If I touch the metal part of the MM case, then the Buzz ceases - I assume therefor that there is an eath loop somewhere?? Has anyone else had this problem?

Also a question re scripts:

If I have a script
1 RepeatingRamp: 8 s

I would like to be able to change the time of the ramp and the direction of the ramp at random under control from MAX - so the changes would need to be MCC's - I se how to change the time, but can;t see how to change the direction - also i would want the ramp when changed to go to the target from it's current state, not from a new beginning number.

posted 13 November 2001 08:14            

So the solution is to cut the wire going to the middle pin (or sheald)in the cable at one end. You obviously don't have isolation at the moment because touching the MM changes the buzz sound.

But I would expect this to work the other way round and that touching the MM would make the buzz louder. It could be that you are lacking an earth somewhere else, and that you are improving the problem by grounding it yourself via the motor mix (and the third connection in the midi lead).

But its all a black art and odd things happen that never follow an absolute rule.(here, two wrongs can make a right)

posted 13 November 2001 09:54            

1 - (1 repeatingRamp: 8 s)

To make this variable, you could use

!Rev + ((1 - (!Rev * 2)) * (1 repeatingRamp: 8 s))

This should give you an up-ramp when !Rev is 0 and a downramp when !Rev is 1. You could make !Rev a Switch or a Toggle and restrict its values to 0 and 1.

Another approach would be to paste an Oscillator or a Sample into your parameter field in place of the ramp expression. Set the wavetable of the Osc or Samp to #Ramp. Set its frequency to

default * !Direction

Then set !Direction to -1 when you want to go backward and set it to 1 when you want to go forward.

To set the rate of the ramp, modify the frequency parameter to read:

!Dur s hz * !Direction

then you can supply the duration of the ramp from a MIDI continuous controller as well.