"Based on an original design by the (in)famous Harry Bissell, Jr., this module contains two quite unique lag (or slew) generators... while this module does normal glide/portamento type effects nicely, what makes it unique is the fact that you have separate control over the rise time, fall time and shape of the curve... very useful and fun to play with."
Sunday, October 08, 2006
Livewire Dual Bissell Generator
"Based on an original design by the (in)famous Harry Bissell, Jr., this module contains two quite unique lag (or slew) generators... while this module does normal glide/portamento type effects nicely, what makes it unique is the fact that you have separate control over the rise time, fall time and shape of the curve... very useful and fun to play with."
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I wouldn't call "separate control over rise and fall time" unique at all. While not found on the original Moog Modular and modules that borrowed from it it's been on a number of more serious modulars. Something like the Bananalogue Serge VCS is going to give you that, plus voltage control not found on this and a whole lot of other functions. MOTM also has a more straight forward module with separate controls and VC while even a Doepfer basic system has separate controls lacking the VC and perhaps some percision in comparison to this though I've not done a head to head. What I can say is the MOTM is very tight and you can bypass the circuit via VC, something this ought to have available, though you could accomplish it with someone elses VC switch module.
ReplyDeleteIsn't it a 'Bessel' function and not a 'Bissell function'?
ReplyDeleteA bessel function is what I need. A VC Reset LFO + a VCA + Envelope.
Does this do that?
This module is obviously designed to make 'hoover' sounds.
ReplyDeleteHarry Bissell's 'Morph-Lag'
ReplyDeleteLooks like you can buy the pcb from Ken Stone for $4. Its cgs module CGS50 Harry's Morph-Lag.
ReplyDeleteSee...
http://www.cgs.synth.net/
Jeez, after having a look at the schematic, I hope the final cost of the module is cheap. Two op amps a couple of diodes some resistors and pots and jacks on each one. If you bought 2 of ken's boards, bought your own parts (total parts cost for both of them would be under $8!) and made your own faceplate you could have your own module for about $16 dollars US.
ReplyDelete> you could have your own module for about $16 dollars US.
ReplyDeleteYeah, you could build just about any module out there for under $50 in parts. The worth you place on your time and electronics expertise is the determining factor, of course. I'm guessing a price point of $150. Bets anyone?
No one would dare complain if it had Buchla stamped on the front of it and cost $475.
I've traced out a doepfer dual vca and quad lfo... built the vca for uh, 3 bucks? $1? Anyway, many circuits are simple and cost very little to produce. When a man spends his life creating these modules, though, the cost is driven miles past that of the raw materials. The module is absolutely worth whatever it costs to the non-DIYer.
ReplyDelete"No one would dare complain if it had Buchla stamped on the front of it and cost $475."
ReplyDeleteWell, actually Buchla has a slew with separate rise/fall control. The 255. It's octal (8 separate slews), each also with an input offset knob.
$1000.
Exactly.
ReplyDeleteThe Buchla 255 is disarmingly elegant in its simplicity.
ReplyDelete...if you're into that sort of thing.
I think the slew generators in the buchla also can act as A/R generators when sent a pulse, same as the one in the Fenix
ReplyDeleteActually, all slews with separate rise/fall controls can bed be used as A/Rs if you feed them a gate. FUnctionally it IS an A/R at that point. It'll begin to charge (rise or attack) when the gate goes high and climb and hold at that level if the gate time allows, then begin to discharge (fall - release) when the gate is released.
ReplyDeleteWhat makes the Buchla a little more useful for this is each slew is fitted with an offset pot, which for the purpose of an A/R serves as a attenuator.