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2026-01-29 by Benjamin Tremblay
Yes! I was thinking the same thing. A dream DSP product with barely enough integration. Other details I needed to repair the amplifier and power an mcu for the midi. It uses the� TA8227APG� car amplifier IC, in bridged mode to drive the internal speaker, so I assume one of the ch
2026-01-29 by Jacob Watters
It sounds like it might be behaving like a Yamaha DJX. That synth will respond to all midi channels all the time, but just use the GM sounds for each channel. To get it to use the sound that you select, you have to set the midi RX channel. Then the channel you set will play the s
2026-01-29 by Adam (synthDIY)
Great post Benjamin that is gold... you can tell just how excited they were when they came up with that circular 1 bar write-logic... https://youtu.be/M3GDyZsmUhM Trackformer XW-PD1 Introduction youtu.be I suppose, like so many instruments, once a certain amount of the "muscle m
2026-01-29 by grant musictechnologiesgroup.com
I can't remember where I got it, but I use one from this company. Maybe the keywords here will help. Mine has very little evaporation. I only fill it about 25% or the way and it would take many months to evaporate. https://rrlotion.com/products/esd-safe-blue-bottles/ On 1/28/2026
2026-01-29 by Benjamin Tremblay
Hi, just asking in case anyone knows about how to get sampled sound to play via external MIDI controller. I got this Casio “trackformer” thing in hopes I could trigger its sounds with MIDI. I added 5-pin MIDI to it and it works. However, its MIDI implementation is sketchy. Very l
2026-01-29 by Benjamin Tremblay
Some kind of heart emoji is in order. I tend to overbuild my Teensy projects until they do way too many things. This is using all the Teensy (and chatgpt) goodness to do one thing well. And yet, it seems there’s one thing that could be added, perhaps some granular controls. Most
2026-01-29 by Heitor Alves
Hi All https://github.com/HeitorAL9000/TeensyLooper TeensyLooper An audio looper with reverse capabilities and low latency, reverb and based on the Teensy (4 and 4.1) platform. This project is born out of the "need" for a simple audio reverse tool for my live setup. It will be co
2026-01-29 by Roman Sowa
I use regular small jar with twist off lid Roman W dniu 2026-01-28 o 22:10, Jean-Pierre Desrochers via Synth-diy pisze: > Does anybody use this type of alcool dispenser > > with no inside evaporation over time ? > > Last year I ordered around 4 of these dispensers > on Aliexpress
2026-01-29 by Florian Anwander
Hello Jean Pierre Am 29.01.26 um 05:28 schrieb Michael E Caloroso via Synth-diy: > These are dispensers, they are not storage containers. There's a > difference. Thats the reason. There are dedicated pharmacists bottles with secured sealing caps for the storage. The cap can be re
2026-01-29 by Michael E Caloroso
These are dispensers, they are not storage containers. There's a difference. MC On Wed, Jan 28, 2026 at 4:30 PM Jimmy Moore via Synth-diy synth-diy@synth-diy.org > wrote: I'm used to seeing these described as menda bottles. I'm sure that's a brand name but those might perform bet
2026-01-28 by Jimmy Moore
I'm used to seeing these described as menda bottles. I'm sure that's a brand name but those might perform better than the AliExpress version. On Wed, Jan 28, 2026, 2:23 PM H.Sergio Alves via Synth-diy synth-diy@synth-diy.org > wrote: I use these but the ESD version from RS and th
2026-01-28 by H.Sergio Alves
I use these but the ESD version from RS and they are properly sealed. The seal is on the lid itself so that small portion will evaporate and you need a few pumps to get it back up (this sounds soooo wrong ) the longest I’ve left the IPA on was for 3 weeks and when back it was sti
2026-01-28 by jpdesroc@oricom.ca
Does anybody use this type of alcool dispenser with no inside evaporation over time ? Last year I ordered around 4 of these dispensers on Aliexpress for my alcool and Windex needs while cleaning things. But the one who actually stores alcool (IPA) get its inside drying up over ti
2026-01-27 by grant musictechnologiesgroup.com
I believe this 512-bytes device requires -40v for programming (although other references say 5v, I highly doubt that). It seems to be targeted specifically at expanding the memory of the 8048 (IM80c48) judging by the fuzzy schematic. One would be hard pressed, I think, to find a
2026-01-27 by jpdesroc@oricom.ca
That's what I use for programing all my special chips . https://www.aliexpress.com/p/tesla-landing/index.html?scenario=c_ppc_item_bridge&productId=4000206420694&_immersiveMode=true&withMainCard=true&src=google-language&aff_platform=true&isdl=y&src=google&albch=shopping&acnt=272-2
2026-01-27 by grant musictechnologiesgroup.com
What did you use for a programmer!? That's a pretty unique (oddball) part: 512 *bytes*. No matter what parallel chip you use, it's going to require an adapter of some sort. 2732 looks closest, assuming your programmer can handle it. Otherwise I guess it doesn't really matter. How
2026-01-27 by Raf Wlodarczyk
The digiky ones come from Rochester and ALL the ones (i bought 50 of each type) I got from them were bad, partial writes, wouldnt clear etc. I'll look at the AT27, thanks for the suggestion > On 01/27/2026 11:26 AM EST Roman Sowa wrote: > > > DigiKey has a thousand of them, but a
2026-01-27 by Roman Sowa
DigiKey has a thousand of them, but anyway, I wouldn't buy them because of the price and age. Whenever I need to replace old EPROM I pick most common, cheapest and easy to get OTP EPROM, which usually is AT27C256. It has 28 pins so 4 of them will be outside of the socket, which t
2026-01-27 by Raf Wlodarczyk
Hello list, The supply of the IM6654 PROM i use in my Spider clone has dried up and was wondering if anyone had suggestions on how to use a modern part for a replacement. IM6654 is a 8x512B device so could using a AT28C512 on an adapter do the trick? My PROM/EEPROM knowledge is l
2026-01-27 by Michael E Caloroso
There's a group on Facebook for Synth DIY (no relation). Someone wanted to build a mute circuit that detected power up/down. He wanted to avoid the expense of a step down transformer, so he directly applied the utility line power 220VAC to a voltage divider to get the voltage dow
2026-01-26 by Terry Bowman
> On Jan 25, 2026, at 2:46 PM, Roman Sowa via Synth-diy wrote: > > I haven't heard any buzz because the blast was immediately after powering it up. Paging Harry Bissel and his stories. I seem to recall that he did heavy duty testing of industrial strength equipment with equally s
2026-01-26 by Oren Leavitt
Yep - my Facebook feed is full of that crap. - Oren On 1/26/26 6:01 AM, Roman Sowa via Synth-diy wrote: > There is so much AI BS on facebook, that I block them all. It's so > irritating that I cannot even laugh at them, although I think the > intention was for them to be funny. T
2026-01-26 by Roman Sowa
There is so much AI BS on facebook, that I block them all. It's so irritating that I cannot even laugh at them, although I think the intention was for them to be funny. The circuit is always drawn with nice graphics and actual component look instead of symbols, and ridiculous err
2026-01-26 by Donald Tillman
> On Jan 25, 2026, at 9:28 PM, brianw wrote: > > So far, nobody has mentioned AI... > > As soon as I saw "Vibe Circuit Design" on the subject line, I assumed that this was a reference to "Vibe Coding" - which lets an AI try its hand at writing code. Thus, I figured that the red-h
2026-01-26 by brianw
So far, nobody has mentioned AI... As soon as I saw "Vibe Circuit Design" on the subject line, I assumed that this was a reference to "Vibe Coding" - which lets an AI try its hand at writing code. Thus, I figured that the red-hot component was the result of allowing an AI to desi
2026-01-25 by Roman Sowa
I haven't heard any buzz because the blast was immediately after powering it up. Roman W dniu 2026-01-25 o 19:25, Oren Leavitt via Synth-diy pisze: > I'll bet the transformer made a wonderful harmonic rich buzz before that > poor bridge rectifier blew. > > On 1/25/26 5:29 AM, Rom
2026-01-25 by S Ridley
Sometimes you get lucky - back when I was a student I did lab work with a color-blind student. I assembled a project around three breadboards of TTL chips. Didn't work. After over an hour of checking every connection, someone noticed it was taking a lot of current - and then that
2026-01-25 by Terry Bowman
> On Jan 25, 2026, at 6:17 AM, Ingo Debus via Synth-diy wrote: > > Reversed the +15 V and the -15 V supply of a 741 (by mistake). Bang!🤯 Reversed -15V and Gnd once. Blew all of the 4136s but the 741 survived. > On Jan 25, 2026, at 1:25 PM, Oren Leavitt via Synth-diy wrote: > > I'
2026-01-25 by Oren Leavitt
I'll bet the transformer made a wonderful harmonic rich buzz before that poor bridge rectifier blew. On 1/25/26 5:29 AM, Roman via Synth-diy wrote: > My most spectacular fail was exploding 8A-rated rectifier brigde wrongly > connected to 400W transformer. > > > Roman > > > > ----
2026-01-25 by Jason Proctor
I wired up the transformer in an 1176 build the wrong way. I thought the smell was it just warming up... well it warmed up all right. On Sun, 25 Jan 2026 at 03:33, Roman via Synth-diy wrote: > > My most spectacular fail was exploding 8A-rated rectifier brigde wrongly connected to
2026-01-25 by Roman
My most spectacular fail was exploding 8A-rated rectifier brigde wrongly connected to 400W transformer. Roman ---- Użytkownik crystal via Synth-diy napisał ---- Nice one Don. I've melted resistors, blown up chips and caps, but, haven't ignited an inductor...yet. Maybe i need to t
2026-01-25 by Ingo Debus
Am 24.01.2026 um 23:39 schrieb Oren Leavitt via Synth-diy : blew the lids off of ICs Me too! Reversed the +15 V and the -15 V supply of a 741 (by mistake). Bang!🤯 Ingo
2026-01-24 by Oren Leavitt
Failures and blow-ups are the best teachers! There is wisdom gained in every puff of magic smoke. I've created light emitting resistors, launched electrolytic caps into low Earth orbit, blew the lids off of ICs - here we are! As that Rice Krispies breakfast cereal commercial went
2026-01-24 by crystal
Nice one Don. I've melted resistors, blown up chips and caps, but, haven't ignited an inductor...yet. Maybe i need to try harder? ;-} Adam, glad it wasn't a tube circuit! Richie, no doubt, pyrotechnics and all. Crystal Chris~ On 1/23/2026 1:11 PM, rburnett@richieburnett.co.uk wro
2026-01-23 by rburnett@richieburnett.co.uk
Made me chuckle, Adam. Glad you lived to tell the tale though! :-) Every day is a learning day in electronics. -Richie, On 2026-01-23 09:39, Adam (synthDIY) wrote: > ROFL > thx Don > we've all had those "learning" experiences, haven't we? > > Like when I absent-mindedly started s
2026-01-23 by Mattias Rickardsson
Den fre 23 jan. 2026 10:41Adam (synthDIY) synthdiy@adambaby.com >; skrev: Like when I absent-mindedly started soldering a board in my SH-2000 with the mains still on.... Who hasn't done that mistake? :---) Sent from a friend /mr
2026-01-23 by Adam (synthDIY)
ROFL thx Don we've all had those "learning" experiences, haven't we? Like when I absent-mindedly started soldering a board in my SH-2000 with the mains still on.... A > On 23 Jan 2026, at 18:05, Donald Tillman wrote: > > Got a ways to go... > > https://x.com/beneater/status/20129
2026-01-23 by Donald Tillman
Got a ways to go... https://x.com/beneater/status/2012988790709928305
2026-01-20 by Richie Burnett
That sounds cool. Thanks Adam. I definitely need to give this a try when I get my JX-3P put back together :-) -Richie, -----Original Message----- From: Adam (synthDIY) Sent: Monday, January 19, 2026 10:17 PM To: rburnett@richieburnett.co.uk Cc: synth-diy mailing list Subject: Re:
2026-01-20 by Adam (synthDIY)
Thanks René! Richie 2 coffees down and page 6 of the SM tells me you are probably right: LFO (as well as ADSR) are software-generated, so almost certainly given the modulation architecture, the noise source is too  > On 20 Jan 2026, at 07:31, rburnett@richieburnett.co.uk wrote:
2026-01-19 by Adam (synthDIY)
It's an undocumented feature. In the manual, it would appear that LFO modulation is restricted to sine, square or random (Edit group B, option 10, buttons A B or C). However, if you hit the fourth button "D" you get a noise source modulation that can affect both the oscillators a
2026-01-19 by rburnett@richieburnett.co.uk
That's interesting Adam. I didn't know the JX-3P could do that! I don't see a modulation path from the analogue noise source to the DCOs though, so I guess the noise modulation you mention must be done digitally by the micro? -Richie, On 2026-01-18 21:52, Adam (synthDIY) wrote: >
2026-01-19 by synth@schmitzbits.de
Hi Tom and all, I have used the chip but not in this exact configuration. As a first step I would use a unity gain buffer. What ever the input bias current, would be provided by that. The OTA outputs would not like to be loaded anyway. So it's basically the circuit as depicted, l
2026-01-19 by synth@schmitzbits.de
That. You see the buffers and S&H caps on the left, there is a DC under control of the processor. With VR32 you even out the variations in amplitude of the noise transistor, by changing the control sensitivity. Cheers, René Von: Synth-diy im Auftrag von Adam (synthDIY) Gesendet:
2026-01-19 by Mike Bryant
Looks like it should work. To be safe you could just put a unity gain op-amp between output and input as that would also bias the internal input op-amp. ________________________________ From: Synth-diy on behalf of Tom Wiltshire Sent: 19 January 2026 12:59 To: synth-diy@synth-diy
2026-01-19 by Tom Wiltshire
The Alfa AS3350 dual SVF shows two different filters in the datasheet: https://alfatriode.lv/eng/sc/AS3350.pdf One is HP/BP and the other is LP/BP. All outputs are via a non-inverting op-amp with 22K/220R feedback resistors, so set up for a x101 gain. The LP/BP design has a match
2026-01-18 by Adam (synthDIY)
I wonder if it has something to do with the noise modulation option in the JX3P, rather than just the use of noise as part of the patch mix? Noise modulation is available from the front panel but not from the PG-200 A > On 19 Jan 2026, at 05:47, Richie Burnett wrote: > > Thanks f
2026-01-18 by Oren Leavitt
I was thinking same - rectified/filtered DC level of noise feed back to OTA gain control acts like a compressor to give noise output a steady amplitude. Seems this eliminates the need for gain trim due to variances in noise transistors, too. On 1/18/26 11:13 AM, Richie Burnett wr
2026-01-18 by Richie Burnett
Thanks for the confirmation everyone. It just seemed like a strange thing to include what must have been an expensive BA662 OTA device at the time, instead of using yet another trim-pot to calibrate the noise level. Obviously the AGC approach would try to correct for long-term dr
2026-01-18 by Oren Leavitt
My 3D printer can be very musical when printing objects with lots of angles or curves. On 1/18/26 10:32 AM, Terry Bowman via Synth-diy wrote: > https://www.instructables.com/Stepper-Motors-Synth/ www.instructables.com/Stepper-Motors-Synth/> > > > Terry Bowman, KA4HJH > "The Mac D