I've been sending tons of MIDI to the dtxpress without any eroneous noise, but I have heard this noise on other systems and , in most cases, it turned out to be caused from crosstalk in the audio cables/mixer/ground loop/etc. I would start from ground zero and attempt to eliminate the noise source through process of elimination. ken anthony --- In DTXpress@egroups.com, "Rich" <rich@t...> wrote: > Hey Dan, that's rather bizarre. Let us know if the solution sticks. I have > the same issue as I said before, so I am definitely interested. I just > figured the OS was written poorly. For me the clicks only occur when midi > data is sent to the unit, not if its in "local on" mode. I guess it is > possible a midi ground could interact with audio. I am wondering why an OS > reset clears the problem for me but not you, and how it is possible for > software to create a grounding issue, but I'm glad you are getting a handle > on it. Rich > Unique Sample CD Roms, Loops and SoundFonts > Main site: http://www.tweakheadz.com > MP3 files: http://www.mp3.com/tweakheadz > > ----- Original Message ----- > From: "Dan Mowczan" <pinball@h...> > To: <DTXpress@egroups.com> > Sent: Monday, January 15, 2001 12:04 AM > Subject: Re: [DTXpress] MIDI transmission causes noise? > > > > Hey everyone, last post on this topic, I found something that is a > solution, > > albeit something I need to learn more about. And, wanted to send this to > > the people who responded and wanted to know what I found (mainly wether or > > not my unit was to be determined faulty). > > > > When I run my Roland KC-500 through a two to three prong adapter, the > > ticking disappears. I ran across something similar when I set up my home > > theatre system. The Klipsch subwoofer actually came with a three- to-two > > prong adapter, indicating it should be used if inexplicable noise appears, > > and they recommended getting a ground isolator for my cable line if this > > solved the problem. It was the solution there, and it is in fact seeming > to > > be the solution here. Of course, determining where the ground problem > > exists is critical to the safety of my equipment. > > > > Thanks for the friendly responses! > > > > -Dan > > > > -- > > Dan Mowczan, pinball@h... > > > > > From: Dan Mowczan <pinball@h...> > > > Reply-To: DTXpress@egroups.com > > > Date: Mon, 15 Jan 2001 00:14:35 -0500 > > > To: <DTXpress@egroups.com> > > > Subject: Re: [DTXpress] MIDI transmission causes noise? > > > > > > Shoot, no solution. Even the 'pulse' during non-communication (which I > > > assume is some sort of watchdog to insure communication exists) pulse > right > > > through and after a reset. I'm going to call Yamaha tommorrow and get > their > > > thoughts on it. > > > > > > -Dan > > > > > > -- > > > Dan Mowczan, pinball@h... > > > > > >> From: "Rich" <rich@t...> > > >> Organization: Tweakheadz Audio Lab > > >> Reply-To: DTXpress@egroups.com > > >> Date: Sun, 14 Jan 2001 01:41:47 -0600 > > >> To: <DTXpress@egroups.com> > > >> Subject: Re: [DTXpress] MIDI transmission causes noise? > > >> > > >> Dan, > > >> > > >> > > >> I had the same problem. What i think is going on is that the DTXpress > > >> internal memory management gets corrupted. The solution is to reset > the > > >> machine by using the sequence of button pushes detailed in the manual. > You > > >> will lose all custom patches unless you save them via sysex 1st. You > can > > >> load them back in after the reset. They will still work and the pops > will > > >> be gone. > > >> > > >> Best, > > >> Rich > > >> Unique Sample CD Roms, Loops and SoundFonts > > >> Main site: http://www.tweakheadz.com > > >> MP3 files: http://www.mp3.com/tweakheadz > > >> > > >> ----- Original Message ----- > > >> From: "Dan Mowczan" <pinball@h...> > > >> To: <DTXpress@egroups.com> > > >> Sent: Saturday, January 13, 2001 8:42 PM > > >> Subject: [DTXpress] MIDI transmission causes noise? > > >> > > >> > > >>> I recently purchased a Roland UM-1 USB Midi interface so I could get > some > > >>> communications working with my PC for storing drum kits. It's a cool > > >> little > > >>> interface, and fairly inexpensive ($49 at Edirol's site) if you want a > USB > > >>> type. > > >>> > > >>> Of course, the driver is crashing my Mac. But, that's another story. > > >>> > > >>> I threw the driver on a PC and started working immediately. I pulled > up a > > >>> MIDI file of some Piano and it played beautifully, except there was a > > >>> cackling coming from my amp, kind of a static or popping sound. At > first > > >> I > > >>> thought 'Boy, these are some bad GM sounds', but after then > downloading > > >> some > > >>> kits from DTXpressions to play with, I hit the 'Send' key on DTXchange > and > > >>> during the entire send, the popping was occuring, this time at a much > > >> faster > > >>> speed, but only for the two seconds or so required to receive the kit. > It > > >>> seems that any MIDI data received causes an audio glitch in the > outputs. > > >>> The transmission worked properly, however. > > >>> > > >>> Then, I noticed anytime MIDI was hooked up, there is a slight ticking > from > > >>> my DTXpress brain in the neighborhood of 240-260bpm. Disconnecting > the > > >>> Roland UM-1 from the MIDI cable, effectively powering it down, stops > the > > >>> ticking. Shutting down the computer but leaving the cables connected > also > > >>> stops the ticking. When the windows driver is running, the ticking > > >> occurs. > > >>> > > >>> Finally, I did a bulk dump of data from the DTXpress brain. This I > can't > > >>> get to work at all. The PC doesn't simply doesn't seem to see any > data. > > >>> During this, I get no popping or static through the amp however. > > >>> > > >>> In frustration, I swapped the MIDI cables in and out in case I did > > >> something > > >>> wrong, which didn't do a thing, but when they were swapped, I was > getting > > >> a > > >>> significant ground hum from my Amp that I wasn't before. > > >>> > > >>> Any ideas on what's causing this? I also can't seem to detect any of > this > > >>> through my headphone jack, but based on the volume output on it, I > can't > > >> say > > >>> for sure if it is there or not. > > >>> > > >>> -Dan > > >>> > > >>> > > >>> > > >>> -- > > >>> Dan Mowczan, pinball@h... > > >>> > > >>> > > >>> eGroups Sponsor > > >>> > > >>> > > >>> Community email addresses: > > >>> Post message: DTXpress@onelist.com > > >>> Subscribe: DTXpress-subscribe@onelist.com > > >>> Unsubscribe: DTXpress-unsubscribe@onelist.com > > >>> List owner: DTXpress-owner@onelist.com > > >>> > > >>> Shortcut URL to this page: > > >>> http://www.onelist.com/community/DTXpress > > >>> > > >>> > > >> > > >> > > >> Community email addresses: > > >> Post message: DTXpress@onelist.com > > >> Subscribe: DTXpress-subscribe@onelist.com > > >> Unsubscribe: DTXpress-unsubscribe@onelist.com > > >> List owner: DTXpress-owner@onelist.com > > >> > > >> Shortcut URL to this page: > > >> http://www.onelist.com/community/DTXpress > > >> > > > > > > > > > Community email addresses: > > > Post message: DTXpress@onelist.com > > > Subscribe: DTXpress-subscribe@onelist.com > > > Unsubscribe: DTXpress-unsubscribe@onelist.com > > > List owner: DTXpress-owner@onelist.com > > > > > > Shortcut URL to this page: > > > http://www.onelist.com/community/DTXpress > > > > > > > > > eGroups Sponsor > > > > > > Community email addresses: > > Post message: DTXpress@onelist.com > > Subscribe: DTXpress-subscribe@onelist.com > > Unsubscribe: DTXpress-unsubscribe@onelist.com > > List owner: DTXpress-owner@onelist.com > > > > Shortcut URL to this page: > > http://www.onelist.com/community/DTXpress > > > >
Message
Re: MIDI transmission causes noise?
2001-01-15 by Ken Anthony