Search found 251 matches

Yes, that 1R resistor can be left out. It was probably there as a holdover from playing with different curves.

Just happened upon this site:-
http://www.aetherwellen-musik.de/Realton-Variophon-Standard/Variophon-Modules
which has some really great work on reverse engineering some of the modules

tc

Grea ...

Did anyone figure this out?

Yes, much clearer?

Do you have a schematic or url for the eq boards?

I read there are three relative weak spots for thst TASCAM mixer.

1. EQs are too sharp
2. Crosstalk
3. Noise

The first may be improved by different resistors. If you gave the skills, look at ...

A good way to apporoach problems is to be systematic.

So lets start with the theory that it is the passive mixing causing the interference. Are they just resistors or are they pots? If they are p ...

Hi. If you have several oscillators, and tuning one affects the others, your circuit has some coupling.

So it could be occuring through the power supply, in which case you add more decoupling ca ...

Hi.

Five ideas.

First, would adding a volume control get you a long way there? It can be just a single potentiometer.

Second, would a permanent cut in volume get you a long way there? So ju ...

Updated URL for circuit diagram:

https://www.researchgate.net/publication/263228583_The_digital_pulse_forming_as_an_oldnew_sound_synthesis_principle

I have tried to reverse engineer the schemat ...

Since we are on the subject, here is an unusual kind of 2-transistor VCA I have been toying with, as a quasi 4Q multiplier. Expressly lo-fi: I wanted it for inside a waveshaper, so fiddling with the ...

Why am I seeing transconductance amplifiers being used for VCAs? Ie the CA3280 (that is now obsolete) - I'm looking at the Prophet 5 voice circuit. Since it says voltage control, a standard opamp alre ...

I few years ago I put up a circuit for MinMaxMix, a diode mixer/waveshaper here. I haven't put it out a Fricko product, because of a niggle that there was some angle missing that it could be used for. ...

Use a slave saw VCO, synced to the same voltage as controls the triangle. Then you get a perfect wave.

I think the Polyfusion or Aries VCO used this method. You only need the integrator. If you c ...

Every diffrrent VCA differs in what input CV produces unity gain. What is more standardized are the EG levels. Provide a pot on the VCA.

The appropriate level depends on the format of the module. ( ...

Yamaha's patent on their formant synthesis method expired yesterday. US4422362A

It is basically a fixed-frequency sine slave oscillator synched to a master oscillator driven by the KCV. The slave ...

On http://electro-music.com/forum/topic-69105.html I commented to Ian Fritz (name drop! Hero!) that I was not excited about double pulse wave forms (where one is positive and one is negative) be ...

Yes, E Guitar is bang on the money that allowing adjustment of timing is super important for envelope followers.

For simplification, it would be to either have the lagged/shifted full wave circui ...

Hi. Sorry for the delay in answering, I am buried under removalist boxes.

No, the circuit above is not the one of the board, except in outline. The fricko Vox H board follows the circuit of the Po ...

OK, so I am happy to anounce that I now am supplying a PCB/Panel combination Vox H, which is the Polymoog Keyboard Vox Humana circuit as a 4HP 40mm Eurorack board.

The product page is at https://fr ...

Glad to!

It is because the US$99 includes postage and packaging: the US$31 is exclusive of postage and packaging. So that is a saving of more than US$10 in most cases. The typical postage costs ...

Yes, I think some VC formant filters would be great, especially ones that allowed really sharp Q, as this does. A formant filter with VC that went around the edges of the "vowel triangle" w ...

Here is a schematic for a new Envelope Follower.

I think it has two ideas that I have not seen before. (In fact, either by themselves are functional, and I am not sure that combining them does much ...

I don't mind the idea of the pot, actually.

I think a DC-blocking cap after it too, if used for waveshaping rather than CV mixing. That would open the door for cheap modulation by adding a CV to ...

Yes, I think the passive version is safer with some resistor to ground (I mentioned a 1M resistor above for this) and two would be better (resistors are cheap) but I don't know that it would make muc ...

So in the case for MinMaxMix, where it is only diodes and a resistor mix we have three cases:

* If both inputs are below the level of a diode drop, the diodes block, and therefore it is like an ope ...

Author	Message
Topic: Velocitizer: A different approach to adding velocity to ADSR
Ricko Replies: 11 Views: 15073	Posted: Sat Oct 01, 2022 7:13 pm Subject: Velocitizer: A different approach to adding velocity to ADSR Forum: DIY Hardware and Software
Ricko Replies: 11 Views: 15073	Yes, that 1R resistor can be left out. It was probably there as a holdover from playing with different curves.
Topic: Encapsulated Realton Variaphon waveshaper circuit revealed!
Ricko Replies: 11 Views: 13876	Posted: Wed Jun 01, 2022 7:58 pm Subject: Re: Encapsulated Realton Variaphon waveshaper circuit revealed! Subject description: Wind/brass instrument synthesis using dynamic fixed pulses Forum: DIY Hardware and Software
Ricko Replies: 11 Views: 13876	Just happened upon this site:- http://www.aetherwellen-musik.de/Realton-Variophon-Standard/Variophon-Modules which has some really great work on reverse engineering some of the modules tc Grea ...
Topic: Warp 633 Mini Warp 633 wiring question
Ricko Replies: 5 Views: 5081	Posted: Sun Feb 06, 2022 6:17 am Subject: Warp 633 Mini Warp 633 wiring question Forum: DIY Hardware and Software
Ricko Replies: 5 Views: 5081	Did anyone figure this out?
Topic: Let's talk mixer EQ - specifically improving the EQ in mine
Ricko Replies: 17 Views: 6817	Posted: Tue May 04, 2021 10:18 pm Subject: Let's talk mixer EQ - specifically improving the EQ in mine Forum: DIY Hardware and Software
Ricko Replies: 17 Views: 6817	Yes, much clearer? Do you have a schematic or url for the eq boards?
Topic: Let's talk mixer EQ - specifically improving the EQ in mine
Ricko Replies: 17 Views: 6817	Posted: Sun Mar 07, 2021 10:26 pm Subject: Let's talk mixer EQ - specifically improving the EQ in mine Forum: DIY Hardware and Software
Ricko Replies: 17 Views: 6817	I read there are three relative weak spots for thst TASCAM mixer. 1. EQs are too sharp 2. Crosstalk 3. Noise The first may be improved by different resistors. If you gave the skills, look at ...
Topic: Help with basic limiter/VCA at end of diy synth signal path
Ricko Replies: 58 Views: 17315	Posted: Sun Nov 15, 2020 10:34 pm Subject: Help with basic limiter/VCA at end of diy synth signal path Forum: DIY Hardware and Software
Ricko Replies: 58 Views: 17315	A good way to apporoach problems is to be systematic. So lets start with the theory that it is the passive mixing causing the interference. Are they just resistors or are they pots? If they are p ...
Topic: Help with basic limiter/VCA at end of diy synth signal path
Ricko Replies: 58 Views: 17315	Posted: Thu Nov 12, 2020 12:24 am Subject: Help with basic limiter/VCA at end of diy synth signal path Forum: DIY Hardware and Software
Ricko Replies: 58 Views: 17315	Hi. If you have several oscillators, and tuning one affects the others, your circuit has some coupling. So it could be occuring through the power supply, in which case you add more decoupling ca ...
Topic: Help with basic limiter/VCA at end of diy synth signal path
Ricko Replies: 58 Views: 17315	Posted: Wed Oct 28, 2020 4:41 pm Subject: Help with basic limiter/VCA at end of diy synth signal path Forum: DIY Hardware and Software
Ricko Replies: 58 Views: 17315	Hi. Five ideas. First, would adding a volume control get you a long way there? It can be just a single potentiometer. Second, would a permanent cut in volume get you a long way there? So ju ...
Topic: Encapsulated Realton Variaphon waveshaper circuit revealed!
Ricko Replies: 11 Views: 13876	Posted: Fri Oct 23, 2020 7:25 pm Subject: Encapsulated Realton Variaphon waveshaper circuit revealed! Forum: DIY Hardware and Software
Ricko Replies: 11 Views: 13876	Updated URL for circuit diagram: https://www.researchgate.net/publication/263228583_The_digital_pulse_forming_as_an_oldnew_sound_synthesis_principle I have tried to reverse engineer the schemat ...
Topic: Single transistor VCA circuit
Ricko Replies: 79 Views: 190159	Posted: Mon Sep 07, 2020 7:39 pm Subject: Single transistor VCA circuit Forum: DIY Hardware and Software
Ricko Replies: 79 Views: 190159	Since we are on the subject, here is an unusual kind of 2-transistor VCA I have been toying with, as a quasi 4Q multiplier. Expressly lo-fi: I wanted it for inside a waveshaper, so fiddling with the ...
Topic: Why Can't a VCA just be an opamp
Ricko Replies: 6 Views: 4715	Posted: Thu Jun 18, 2020 8:22 pm Subject: Re: Why Can't a VCA just be an opamp Forum: DIY Hardware and Software
Ricko Replies: 6 Views: 4715	Why am I seeing transconductance amplifiers being used for VCAs? Ie the CA3280 (that is now obsolete) - I'm looking at the Prophet 5 voice circuit. Since it says voltage control, a standard opamp alre ...
Topic: Region Diode Mixer: circuit idea
Ricko Replies: 0 Views: 1149	Posted: Sat Apr 04, 2020 11:53 pm Subject: Region Diode Mixer: circuit idea Subject description: Progressive tone variation: towards regions and registers Forum: DIY Hardware and Software
Ricko Replies: 0 Views: 1149	I few years ago I put up a circuit for MinMaxMix, a diode mixer/waveshaper here. I haven't put it out a Fricko product, because of a niggle that there was some angle missing that it could be used for. ...
Topic: Looking for "anywave" to sawtooth converter - anyone?
Ricko Replies: 6 Views: 3138	Posted: Sun Dec 22, 2019 4:19 pm Subject: Looking for "anywave" to sawtooth converter - anyone? Forum: DIY Hardware and Software
Ricko Replies: 6 Views: 3138	Use a slave saw VCO, synced to the same voltage as controls the triangle. Then you get a perfect wave. I think the Polyfusion or Aries VCO used this method. You only need the integrator. If you c ...
Topic: Envelope Generator CV output? 0-5V? 0-10V? 0-?
Ricko Replies: 3 Views: 2313	Posted: Wed Nov 06, 2019 3:21 pm Subject: Envelope Generator CV output? 0-5V? 0-10V? 0-? Forum: DIY Hardware and Software
Ricko Replies: 3 Views: 2313	Every diffrrent VCA differs in what input CV produces unity gain. What is more standardized are the EG levels. Provide a pot on the VCA. The appropriate level depends on the format of the module. ( ...
Topic: Patching Yamaha's Formant Synthesis on an analog
Ricko Replies: 0 Views: 3094	Posted: Sat Oct 26, 2019 12:01 am Subject: Patching Yamaha's Formant Synthesis on an analog Forum: Instruments and Equipment » Modular Synthesis
Ricko Replies: 0 Views: 3094	Yamaha's patent on their formant synthesis method expired yesterday. US4422362A It is basically a fixed-frequency sine slave oscillator synched to a master oscillator driven by the KCV. The slave ...
Topic: Double pulses of plucked strings
Ricko Replies: 2 Views: 3326	Posted: Tue Sep 17, 2019 5:07 pm Subject: Double pulses of plucked strings Forum: DIY Hardware and Software
Ricko Replies: 2 Views: 3326	On http://electro-music.com/forum/topic-69105.html I commented to Ian Fritz (name drop! Hero!) that I was not excited about double pulse wave forms (where one is positive and one is negative) be ...
Topic: A new envelope follower
Ricko Replies: 13 Views: 11726	Posted: Wed Sep 11, 2019 6:12 am Subject: A new envelope follower Forum: DIY Hardware and Software
Ricko Replies: 13 Views: 11726	Yes, E Guitar is bang on the money that allowing adjustment of timing is super important for envelope followers. For simplification, it would be to either have the lagged/shifted full wave circui ...
Topic: Vox Humana
Ricko Replies: 8 Views: 11592	Posted: Mon Aug 12, 2019 6:25 am Subject: Vox Humana Forum: DIY Hardware and Software
Ricko Replies: 8 Views: 11592	Hi. Sorry for the delay in answering, I am buried under removalist boxes. No, the circuit above is not the one of the board, except in outline. The fricko Vox H board follows the circuit of the Po ...
Topic: Vox Humana
Ricko Replies: 8 Views: 11592	Posted: Tue Aug 06, 2019 7:15 am Subject: Vox H product <- fricko Forum: DIY Hardware and Software
Ricko Replies: 8 Views: 11592	OK, so I am happy to anounce that I now am supplying a PCB/Panel combination Vox H, which is the Polymoog Keyboard Vox Humana circuit as a 4HP 40mm Eurorack board. The product page is at https://fr ...
Topic: ProPulse waveshaper panel/PCB combination released <--fricko
Ricko Replies: 2 Views: 5159	Posted: Thu Aug 01, 2019 3:30 am Subject: ProPulse waveshaper panel/PCB combination released <--fricko Forum: DIY Hardware and Software
Ricko Replies: 2 Views: 5159	Glad to! It is because the US$99 includes postage and packaging: the US$31 is exclusive of postage and packaging. So that is a saving of more than US$10 in most cases. The typical postage costs ...
Topic: Vox Humana
Ricko Replies: 8 Views: 11592	Posted: Mon Jul 22, 2019 5:35 pm Subject: Vox Humana Forum: DIY Hardware and Software
Ricko Replies: 8 Views: 11592	Yes, I think some VC formant filters would be great, especially ones that allowed really sharp Q, as this does. A formant filter with VC that went around the edges of the "vowel triangle" w ...
Topic: A new envelope follower
Ricko Replies: 13 Views: 11726	Posted: Thu Jul 11, 2019 2:17 am Subject: A new envelope follower Forum: DIY Hardware and Software
Ricko Replies: 13 Views: 11726	Here is a schematic for a new Envelope Follower. I think it has two ideas that I have not seen before. (In fact, either by themselves are functional, and I am not sure that combining them does much ...
Topic: MinMaxMix circuit
Ricko Replies: 18 Views: 17625	Posted: Wed Jul 10, 2019 6:02 pm Subject: MinMaxMix circuit Forum: DIY Hardware and Software
Ricko Replies: 18 Views: 17625	I don't mind the idea of the pot, actually. I think a DC-blocking cap after it too, if used for waveshaping rather than CV mixing. That would open the door for cheap modulation by adding a CV to ...
Topic: MinMaxMix circuit
Ricko Replies: 18 Views: 17625	Posted: Tue Jul 09, 2019 6:07 pm Subject: MinMaxMix circuit Forum: DIY Hardware and Software
Ricko Replies: 18 Views: 17625	Yes, I think the passive version is safer with some resistor to ground (I mentioned a 1M resistor above for this) and two would be better (resistors are cheap) but I don't know that it would make muc ...
Topic: MinMaxMix circuit
Ricko Replies: 18 Views: 17625	Posted: Tue Jul 09, 2019 12:33 am Subject: MinMaxMix circuit Forum: DIY Hardware and Software
Ricko Replies: 18 Views: 17625	So in the case for MinMaxMix, where it is only diodes and a resistor mix we have three cases: * If both inputs are below the level of a diode drop, the diodes block, and therefore it is like an ope ...