Search found 3949 matches

by Navs
Tue Jan 28, 2020 4:50 pm
Forum: Music Tech DIY
Topic: JFET mute in a mixer
Replies: 71
Views: 3003

Re: JFET mute in a mixer

A correctly implemented mute is expected to function with power on and input anywhere within expected signal range on that input. Eliminating the need for the extra steps in your workaround. Thanks KSS. Can you please explain why interrupting the signal output with a switch would be incorrect or di...
by Navs
Tue Jan 28, 2020 4:44 pm
Forum: Expert Sleepers
Topic: ES-3, DINsync + LogicX: won't start when recording
Replies: 1
Views: 159

Re: ES-3, DINsync + LogicX: won't start when recording

No-one else experience this?

I have also tried activating MIDI clock but that didn't help. Any ideas? :hmm:
by Navs
Sun Jan 26, 2020 3:41 pm
Forum: Expert Sleepers
Topic: ES-3, DINsync + LogicX: won't start when recording
Replies: 1
Views: 159

ES-3, DINsync + LogicX: won't start when recording

I am so late to the game on this but I finally got my 808 swinging via the Sync plugin in Logic today :sb: It works fine in play mode, but when I arm an audio track by focussing on it, the 808 won't run when I hit record. The plugin is outputting something, according to the mixer, but the 808 is not...
by Navs
Sun Jan 26, 2020 4:09 am
Forum: Eurorack Modules
Topic: random*source wave multiplier | symmetry, feedback … patch ideas
Replies: 18
Views: 956

Re: random*source wave multiplier | symmetry, feedback … patch ideas

timoka wrote:
Sat Jan 25, 2020 3:35 pm
hi has a lower output level than lo, that's normal, but exactly why i don't know...
Total guess, but maybe it's because a squared-up signal sounds louder, i.e. to compensate for the perceived volume difference? :hmm:
by Navs
Sun Jan 26, 2020 3:48 am
Forum: Music Tech DIY
Topic: JFET mute in a mixer
Replies: 71
Views: 3003

Re: JFET mute in a mixer

Is there an electrical reason for not just using a switch to break the hot connection? Why do that rather than simply interrupt the signal? to avoid power-on spike/speaker click (Ironically found and snipped from your question) :hihi: OK, so it's not to avoid damaging the output opamp, for example?...
by Navs
Sat Jan 25, 2020 11:15 am
Forum: Music Tech DIY
Topic: JFET mute in a mixer
Replies: 71
Views: 3003

Re: JFET mute in a mixer

You could use a DPDT toggle switch if you only wanted manual control. I have a project where manual control would suffice (cutting the audio connection between phono preamp and amp/audio interface to avoid power-on spike/speaker click). Is there an electrical reason for not just using a switch to b...
by Navs
Sat Jan 25, 2020 10:49 am
Forum: Music Tech DIY
Topic: CGS113 Serge Wave Multiplier NP Caps
Replies: 20
Views: 852

Re: CGS113 Serge Wave Multiplier NP Caps

Bodo1967 wrote:
Sat Jan 25, 2020 7:48 am
... mine is finished and working fine ...
Great! Out of interest, does your lower multiplier kick into action smoothly?
by Navs
Sat Jan 25, 2020 3:40 am
Forum: Eurorack Modules
Topic: Doepfer quantizer.....
Replies: 47
Views: 3312

Re: Doepfer quantizer.....

Am I right in understand the trigger in makes it a sort of quantised sample and hold? Yes, that's how I understand it too: Trigger input (Trig.In): If this jack is left open the quantizer is working permanently. If a rectangle voltage is applied quantisation happens only at the rising edge of the s...
by Navs
Sat Jan 25, 2020 3:30 am
Forum: Modular Synth General Discussion
Topic: VCA with Vactrol (or LPG that can bypass its filter)
Replies: 19
Views: 959

Re: VCA with Vactrol (or LPG that can bypass its filter)

marlow wrote:
Fri Jan 24, 2020 10:48 am
I want to generate an amp contour that will be slewed by a vactrol ...
You could use a slew limiter to give you the 'laggy' envelope contour you want.
by Navs
Wed Jan 22, 2020 1:42 pm
Forum: Eurorack Modules
Topic: A-143-9 lin-FM & Buchla Saw Mod
Replies: 12
Views: 1240

Re: A-143-9 lin-FM & Buchla Saw Mod

:zombie: Wicked :sb:
by Navs
Wed Jan 22, 2020 1:39 pm
Forum: Music Tech DIY
Topic: AC wall-wart power supply - half wave rectifier or voltage doubler?
Replies: 57
Views: 1858

Re: AC wall-wart power supply - half wave rectifier or voltage doubler?

If you need dual supplies and can't redesign the circuit for a single supply voltage there are many options ... Thanks, John. I now see Rod Elliott has a project/description for a dual-from-single supply, so I have some reading to do :) https://sound-au.com/project192.htm What do you do for your mo...
by Navs
Tue Jan 21, 2020 3:13 pm
Forum: Music Tech DIY
Topic: AC wall-wart power supply - half wave rectifier or voltage doubler?
Replies: 57
Views: 1858

Re: AC wall-wart power supply - half wave rectifier or voltage doubler?

Thanks for the suggestions. Yes, the 12VAC I am using now was originally for a modem ;) I guess at some point I'll just have to learn to do it properly and build a linear supply with a transformer. But as my current requirements for this project are comparatively low, I do still wonder about a DC-wa...
by Navs
Mon Jan 20, 2020 4:34 pm
Forum: Music Tech DIY
Topic: AC wall-wart power supply - half wave rectifier or voltage doubler?
Replies: 57
Views: 1858

Re: AC wall-wart power supply - half wave rectifier or voltage doubler?

Casio keyboards use DC supplies to be exempt from mains power testing that manufacturers are required to do. That mentally has spread to almost every industry. Especially if it is a global company. If there is a fire, it usually happens in the AC to DC converter. Asking if AC AC supplies are rare i...
by Navs
Sun Jan 19, 2020 4:35 pm
Forum: Music Tech DIY
Topic: AC wall-wart power supply - half wave rectifier or voltage doubler?
Replies: 57
Views: 1858

Re: AC wall-wart power supply - half wave rectifier or voltage doubler?

It's just for me; I'm learning ... Current draw is 16mA per rail for the actual preamp. I have two LEDs on the PSU (see above), so that might double the requirement, but it's not going to be more than 100mA really. I haven't 'scoped the ripple yet, but listening to a variety of music, I can't hear a...
by Navs
Sun Jan 19, 2020 4:05 pm
Forum: Music Tech DIY
Topic: AC wall-wart power supply - half wave rectifier or voltage doubler?
Replies: 57
Views: 1858

Re: AC wall-wart power supply - half wave rectifier or voltage doubler?

I built the preamp and it sounds wonderful with my system :sb: Thanks again! Now that it's up and running, I had a look for a backup AC-AC wallwart and realized they are hard to find. Are they being phased out? I'd like to learn PCB layout using this preamp design, but it strikes me that if I do it ...
by Navs
Fri Jan 17, 2020 2:51 am
Forum: General Gear
Topic: Preferred type of USB connector on music gear?
Replies: 31
Views: 1219

Re: Preferred type of USB connector on music gear?

Where is the option for 'none'? :hihi:
by Navs
Thu Jan 16, 2020 11:35 am
Forum: Eurorack Modules
Topic: TZFM - we need to talk
Replies: 39
Views: 2527

Re: TZFM - we need to talk

electricanada wrote:
Sun Jan 12, 2020 9:49 pm
Can someone point me to a beginner’s explanation of tzfm? I have the Doepfer a110-4, but I have no clue what to do with it.
A few pointers here: https://navsmodularlab.blogspot.com/201 ... ainer.html
by Navs
Thu Jan 16, 2020 11:30 am
Forum: Eurorack Modules
Topic: rubicon2 dixie2+ clean sine?
Replies: 8
Views: 501

Re: rubicon2 dixie2+ clean sine?

since i have no other vco i ihave no reference… iam not sure what to expect from triangle core sine. but in comparison to a resonating filter i find the distortions quite obvious. It sounds like you understand the issue: any shaped sine will not be as pure as a 'real' sine. In that sense, your reco...
by Navs
Wed Jan 15, 2020 4:27 pm
Forum: Eurorack Modules
Topic: doing stickslip sounds with euro
Replies: 20
Views: 944

Re: doing stickslip sounds with euro

onthebandwagon wrote:
Wed Jan 15, 2020 1:09 pm
Are those sounds anything like Curley would make on the Three Stooges?
You mean, like, slap stick? :whistle:
by Navs
Wed Jan 15, 2020 11:09 am
Forum: Eurorack Modules
Topic: doing stickslip sounds with euro
Replies: 20
Views: 944

Re: doing stickslip sounds with euro

I feel like all these methods are going to get you close to one part of the sound but when it comes to the slipstick resonating and doing the vowel-y type stuff you’re getting into lol wtf territory. Great exercise though. I imagine I’d end up with some novel sounds just trying to emulate the base ...
by Navs
Wed Jan 15, 2020 2:58 am
Forum: Eurorack Modules
Topic: doing stickslip sounds with euro
Replies: 20
Views: 944

Re: doing stickslip sounds with euro

thanks guys. good ideas, good hints. how about a slope detector and a joystick for triggers? could you please elaborate? The idea is similar to the one described by desolationjones . The slope detector registers changes in voltage, so every time you move the joystick you get a gate (or in the case ...
by Navs
Tue Jan 14, 2020 4:51 pm
Forum: Eurorack Modules
Topic: doing stickslip sounds with euro
Replies: 20
Views: 944

Re: doing stickslip sounds with euro

I'm with easy too :hihi:

OK, how about a slope detector and a joystick for triggers?

Or a ribbon controller ...



:sb:
by Navs
Mon Jan 13, 2020 4:47 pm
Forum: Music Tech DIY
Topic: AC wall-wart power supply - half wave rectifier or voltage doubler?
Replies: 57
Views: 1858

Re: AC wall-wart power supply - half wave rectifier or voltage doubler?

... long time constants ... That is very interesting. I modelled the filter in Falstad and noticed it took a while but didn't realize it was that long. This might be one reason some preamp manufacturers recommend keeping the device switched on (the other being some voodoo about 'burn-in' :hihi: ) ....

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