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> Per Boysen schrieb: >> You hear the zipper noise (of the TC Electronix FireworX) when I >> use the MIDI expression pedal to adjust the volume, something you >> do a lot when playing guitar (but never with wind instruments). >> It's a little annoying but not that bad that I wouldn't use the >> volume pedal at concert. Strange thing is that when I use a MIDI >> expression pedal to adjust the beat sync tempo division for the >> LFO bound filter (on the reverb return) there is no such noise. On 5 mar 2007, at 23.41, Stefan Tiedje wrote: > Its very likely not an interference, its just unsmoothed direct > control of the amplitude. 128 steps are not fine enough... > You can test this, as its more audible on low frequency sine waves. > if you feed a sound without much overtones/treble and control the > volume is it more audible? Its hard to believe, that they don't > smooth it. > In my Max patches I usually smooth it with 20 ms which creates an > acceptable latency for volume control... Hi Stefan, Smothing was the first fix I tried with the FireworX, but it did not change the noise. I have noticed the same zipper noise also when (1) controlling other FireworX parameters than volume by MICI CC's and (2) in other software when controlling anything by external MIDI CC# (Ableton Live, NI Guitar Rig 2). Anyway, I did a check on what you said about overtone/treble rich sounds. But there is no difference to the noise added by moving the pedal when I feed the box low notes with no treble and when I feed it high and sparkly stuff. Applications I have been using a lot and where I have never noticed any such zipper noise when controlling a continuous parameter with a MIDI CC# are Logic and Numerology. Logic has a fader resolution far higher than the 128 steps of MIDI and Numerology has a built-in "scaling" (i.e. what you call "smoothing"). Greetings from Sweden Per Boysen www.boysen.se (Swedish) www.looproom.com (international) http://tinyurl.com/2kek7h (latest music release)