Roland - AS-1 Sustainer [schematic]
- analogguru
- Old Solderhand
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People like guts? ok, here are some others from our japanese hackerfriends (click on the pictures for high resolution):
enjoy,
analogguru
enjoy,
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
Haha... Well long story short, I am trying to design an effect... I want to build a reverse noise gate... Basically if the volume gets above a certain level it will cut the signal out, until the level is reduced below the set threshold.
I want to build this to put it into a passive feedback loop with a delay pedal... I am thinking that this would allow me to let the delay rampage out of control but have it stay with in a reasonable volume. Plus It ought to give me some interesting stuttering sounds...
Since to the best of my knowledge no body has built the reverse noise gate, I've been looking into ways to do this myself. People have suggested looking into Envelope Followers, Digital Switches, and OTA's to accomplish my goal. So I've been reading up on those... I guess my first question would be where to go to read up on OTA's because they make the least sense to me at the moment. And I'm sure as I read I'll have about a hundred more questions.
I haven't said anything here since I didn't want to bog you guys down with any silly questions...
I want to build this to put it into a passive feedback loop with a delay pedal... I am thinking that this would allow me to let the delay rampage out of control but have it stay with in a reasonable volume. Plus It ought to give me some interesting stuttering sounds...
Since to the best of my knowledge no body has built the reverse noise gate, I've been looking into ways to do this myself. People have suggested looking into Envelope Followers, Digital Switches, and OTA's to accomplish my goal. So I've been reading up on those... I guess my first question would be where to go to read up on OTA's because they make the least sense to me at the moment. And I'm sure as I read I'll have about a hundred more questions.
I haven't said anything here since I didn't want to bog you guys down with any silly questions...
- invictus
- Breadboard Brother
someone please correct me if im wrong, but if you want to "cut" the signal out, the solution could be as simple as diode and FET switching. optoisolators might also be useful.. DEPENDING on the threshold level you're planning.magikker wrote:Haha... Well long story short, I am trying to design an effect... I want to build a reverse noise gate... Basically if the volume gets above a certain level it will cut the signal out, until the level is reduced below the set threshold.
I want to build this to put it into a passive feedback loop with a delay pedal... I am thinking that this would allow me to let the delay rampage out of control but have it stay with in a reasonable volume. Plus It ought to give me some interesting stuttering sounds...
Since to the best of my knowledge no body has built the reverse noise gate, I've been looking into ways to do this myself. People have suggested looking into Envelope Followers, Digital Switches, and OTA's to accomplish my goal. So I've been reading up on those... I guess my first question would be where to go to read up on OTA's because they make the least sense to me at the moment. And I'm sure as I read I'll have about a hundred more questions.
I haven't said anything here since I didn't want to bog you guys down with any silly questions...
"im the master of my fate, im the captain of my soul... " -invictus
Yeah... That's how I think about this... Right now I have page of ideas as to how it might work... but no really solid grasp on a great way to pull it off... I'd also hate to be the guy to derail this thread too much, so feel free to ignore my little side project....invictus wrote: someone please correct me if im wrong, but if you want to "cut" the signal out, the solution could be as simple as diode and FET switching. optoisolators might also be useful.. DEPENDING on the threshold level you're planning.
Yeah... That thread is off topic I guess... When it is moved to debatable you know it is in the "uncomfortable zone"
- seniorLoco
- Resistor Ronker
Rolland AS-!
- seniorLoco
- Resistor Ronker
- seniorLoco
- Resistor Ronker
- bajaman
- Old Solderhand
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Hi senior loco and sosodef
thanks for the pictures - I will draw up a pcb and layout - I may have the schematic in my archives - if not I will have very soon
bajaman
thanks for the pictures - I will draw up a pcb and layout - I may have the schematic in my archives - if not I will have very soon
bajaman
- bajaman
- Old Solderhand
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AS1e posted twice - no AS1f
As1l posted twice is there another pic - AS1m???
cheers
bajaman
As1l posted twice is there another pic - AS1m???
cheers
bajaman
- analogguru
- Old Solderhand
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Schematic is an "old dog" and can be found here:
http://www.geofex.com/FX_images/rolandsu.gif
Inaccurate is the switching: In original the AS-1 doesn´t have true bypass.
The rest seems to be ok, even when the 1µF in series with the LDR made me a little bit nervous (since this will cause "compression dependent frequency response"). But it is really only a 1µF.
Transistors on this unit are 2SC 1681-GR for Q1/Q2 and 2SC 372-Y for Q3/Q4.
What I am wondering is who stole from whom:
Roland from Colorsound or Colorsound from Roland ?
http://www.freeinfosociety.com/electron ... php?id=315
analogguru
http://www.geofex.com/FX_images/rolandsu.gif
Inaccurate is the switching: In original the AS-1 doesn´t have true bypass.
The rest seems to be ok, even when the 1µF in series with the LDR made me a little bit nervous (since this will cause "compression dependent frequency response"). But it is really only a 1µF.
Transistors on this unit are 2SC 1681-GR for Q1/Q2 and 2SC 372-Y for Q3/Q4.
What I am wondering is who stole from whom:
Roland from Colorsound or Colorsound from Roland ?
http://www.freeinfosociety.com/electron ... php?id=315
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- seniorLoco
- Resistor Ronker
ooopppss sorry baja ...its the early friday morning bug !!!
edited and corrected ...thanks
It's a good sustain pedal ...the best i have tried but the compression a wee bit quirky tho. maybe the aging components.
Does not paly well in front of FF type kinda auto cleans up evertime you pluck ....but the sustain in front of a muff type is mind blowing
Can be improved fellas ....
edited and corrected ...thanks
It's a good sustain pedal ...the best i have tried but the compression a wee bit quirky tho. maybe the aging components.
Does not paly well in front of FF type kinda auto cleans up evertime you pluck ....but the sustain in front of a muff type is mind blowing
Can be improved fellas ....
- bajaman
- Old Solderhand
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Have you tried it after a fuzz face
bajaman
bajaman
interesting my post above looks like I actually know something
somehow AG's post is in my name
Cool so its a great sustain pedal. I love that. It would be nice if it could actually compress nicely as well. The idea of a great sustain that compresses poorly sounds like it was half assed.
somehow AG's post is in my name
Cool so its a great sustain pedal. I love that. It would be nice if it could actually compress nicely as well. The idea of a great sustain that compresses poorly sounds like it was half assed.
Last edited by sosodef on 30 Nov 2007, 10:19, edited 1 time in total.
- bajaman
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I would think that Roland (used to be Acetone) were "inspired" by Colorsound, just like Electro Harmonix with their Big Mush pie
Does that make Roland Corp the original Bootweakers AG
cheers
bajaman
Does that make Roland Corp the original Bootweakers AG
cheers
bajaman
- bajaman
- Old Solderhand
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.....or was Mike Matthews the first booteeker
- analogguru
- Old Solderhand
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So, to avoid confusions the mentioned post has been corrected, the answer is folloeing here:sosodef wrote:interesting my post above looks like I actually know something
somehow AG's post is in my name
Cool so its a great sustain pedal. I love that. It would be nice if it could actually compress nicely as well. The idea of a great sustain that compresses poorly sounds like it was half assed.
Q1/Q2 are acting as a 2-stage amplifier. The gain is set by the feedback loop from collector of Q2 to the emitter of Q1 (You could place a potentiometer [50k] there too).are these sustainers working like compressors or is it a different beast?
If the output signal increases the LED is lighting brighter thus the resistance of the LDR decreasing which causes a gain-reduction.
BTW, moany LDR´s are most sensitive at yellow (and not red) light.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- analogguru
- Old Solderhand
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Sorry, but I believe that from the timeline the BMP came first and Colorsound "stole" it from EH, like Ibanez did too.bajaman wrote:I would think that Roland (used to be Acetone) were "inspired" by Colorsound, just like Electro Harmonix with their Big Mush pie
The BMP itself seems to be a mutant from UsPat. 3,223.936 - have a look for yourself
Everybody stole from the other..... but nobody cried:Does that make Roland Corp the original Bootweakers AG
cheers
bajaman
Uhhhhhh ..... You bad guys .... this is MY intellectual property now .... because it was me who stole the "chicken".....
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.