Arp Solus thump (cont.)
2005-03-24 by Stephen Nichols
On the Solus, the lack of an independent volume control makes it tough to isolate the effect on ADSR and/or filter. No 60Hz hum...seems to happen regardless of envelope settings as a thump when key jwire makes contact with bus bar and when it lets off (but not if a second key is depressed while the first remains down when the ADSR is switched to trigger "SINGLE.") Other issues of note: when ADSR is inverted for filter control, it cycles through the parameters properly but when complete and the key is let up, the note continues to hang. Similarly when the ADSR is used to control the Pulse Width, I occasionally get drones as the MOD sliders are raised on each VCO. The MOD sliders almost seem to be working as volume controls for the drone. Alternately, the drone will occasionally sync to some "mystery" LFO in a slow and regular note on/note off cycle that appears independent of actual LFO slider setting on the synth (as evidenced by normal LFO function on FM and Vibrato parameters). Hopefully this is clear...perhaps someone with more experience than myself will recognize these symptoms as pointing to the same cause. Or maybe they'll be able to at least point me to the next step in troubleshooting. Thanks for the help -- Stephen >From: vintagesynthrepair@yahoogroups.com >Reply-To: vintagesynthrepair@yahoogroups.com >To: vintagesynthrepair@yahoogroups.com >Subject: [vintagesynthrepair] Digest Number 781 >Date: 24 Mar 2005 14:27:36 -0000 > > >------------------------ Yahoo! Groups Sponsor --------------------~--> >What would our lives be like without music, dance, and theater? >Donate or volunteer in the arts today at Network for Good! >http://us.click.yahoo.com/rKxVKC/SOnJAA/n1hLAA/QnLolB/TM >--------------------------------------------------------------------~-> > >There are 3 messages in this issue. > >Topics in this digest: > > 1. ARP Solus thump > From: "easterleggs" <milotoll@...> > 2. Re: ARP Solus thump > From: "Mike Walters" <mike@...> > 3. Casio VZ and Atari ST/TT/Falcon questions > From: "Larry T." <larry@...> > > >________________________________________________________________________ >________________________________________________________________________ > >Message: 1 > Date: Wed, 23 Mar 2005 17:53:54 -0000 > From: "easterleggs" <milotoll@...> >Subject: ARP Solus thump > > >Hello to all. My ARP SOLUS produces a "thump" whenever the envelope triggers. It's not a >mechanical noise...it's akin to tapping the end of a cable while it's plugged into an amp/ >speaker. I tried to troubleshoot by using the external audio input just to confirm that it >wasn't the j-wire/bus bar contacts, but I can't get anything to trigger the solus (wurli, >guitar, korg ms20 are what I tried). I guess I need to preamplify. Anybody dealt with >"thumps" before?...the bad kind, that is! Thanks--Stephen > > > > > >________________________________________________________________________ >________________________________________________________________________ > >Message: 2 > Date: Wed, 23 Mar 2005 20:23:18 -0000 > From: "Mike Walters" <mike@...> >Subject: Re: ARP Solus thump > > >Does it do that when the envelope controls both the filter and amp? >When you say it sounds like a cable being tapped, do you hear a 60Hz >hum for a second? Or is it more like turning off the power to >something still plugged into an amp? If you turn off the ADSR, does >it make those noises? >-Mike > >--- In vintagesynthrepair@yahoogroups.com, "easterleggs" ><milotoll@h...> wrote: > > > > Hello to all. My ARP SOLUS produces a "thump" whenever the >envelope triggers. It's not a > > mechanical noise...it's akin to tapping the end of a cable while >it's plugged into an amp/ > > speaker. I tried to troubleshoot by using the external audio input >just to confirm that it > > wasn't the j-wire/bus bar contacts, but I can't get anything to >trigger the solus (wurli, > > guitar, korg ms20 are what I tried). I guess I need to >preamplify. Anybody dealt with > > "thumps" before?...the bad kind, that is! Thanks--Stephen > > > > > >________________________________________________________________________ >________________________________________________________________________ > >Message: 3 > Date: Thu, 24 Mar 2005 03:53:55 -0000 > From: "Larry T." <larry@...> >Subject: Casio VZ and Atari ST/TT/Falcon questions > > >Hello All > >Is anyone aware of a patch editor/librarian for the Casio VZ >synths that runs on the Atari ST/TT/Falcon systems? > >Also, I have just received an "Atari TT Fast Ram board, 32Mb" that I >aquired on eBay. There is no documentation however and there is a >four position dip switch. On the front the board has "(C) Catch >Computer, 12.01.93, Rev 1.4" and on the back is "CC-MegTT". The board
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>has a connector to plug into the TT's expansion bus, and 8 simm >sockets. Does anyone have any documentation regarding this board? Is >there any special software necessary to use it or will the TT >automatically recognize the memory? What size/speed simm's does it >need? And what are the dip switch settings? > >Any assistance is appreciated. > >Larry T. > > > > > >________________________________________________________________________ >________________________________________________________________________ > > > >------------------------------------------------------------------------ >Yahoo! Groups Links > ><*> To visit your group on the web, go to: > http://groups.yahoo.com/group/vintagesynthrepair/ > ><*> To unsubscribe from this group, send an email to: > vintagesynthrepair-unsubscribe@yahoogroups.com > ><*> Your use of Yahoo! Groups is subject to: > http://docs.yahoo.com/info/terms/ > >------------------------------------------------------------------------ > > > >