Search found 364 matches

by Troubleshooter
Tue Jun 30, 2020 7:19 am
Forum: Music Tech DIY
Topic: Yusynth minimoog VCF resonance levels
Replies: 2
Views: 58

Re: Yusynth minimoog VCF resonance levels

Hi, all 3 Yusynth Model-D filter I have done have the original typical bass-drop. I like it as a feature too. No need to worry about it I guess. It can be compensated by patching a feedback loop externally if desired.
by Troubleshooter
Tue Jun 09, 2020 4:18 am
Forum: Music Tech DIY
Topic: TDA1022(P) for JH Triple Chorus
Replies: 7
Views: 211

TDA1022(P) for JH Triple Chorus

Hi all,

Any advice where to buy the right TDA1022's for a descent price? Are there fake ones from china? The prices are ranging from 5€ to more than 20€ a piece. I need 6 for 2 chorus units.

Thanks in advance.
by Troubleshooter
Sun May 24, 2020 5:35 pm
Forum: Music Tech DIY
Topic: Post pics of your DIY setup!
Replies: 883
Views: 221867

Re: Post pics of your DIY setup!

20200524_233822 (2).jpg
20200524_233746 (2).jpg
My mostly Yusynth system. Back to the woodwork for another "floor" for that fixed filterbank.
by Troubleshooter
Tue May 19, 2020 3:20 am
Forum: Music Tech DIY
Topic: 1M LOG A 40mm Slide pots for Crumar DS-2
Replies: 1
Views: 37

1M LOG A 40mm Slide pots for Crumar DS-2

These seem very hard to find. Anyone knows a source?
by Troubleshooter
Tue May 19, 2020 3:17 am
Forum: Music Tech DIY
Topic: Project PRO2021 - A Pro-One keyboard synth
Replies: 1266
Views: 62917

Re: Project PRO2021 - A Pro-One keyboard synth

Hi Devin, As I told you I checked midi arriving on the CPU board itself so yes I do have a scope. The CPU translates them to very short gate-pops instead of full note lenght gates. Only audible with certain ENV/filter settings. The CPU however translates the keybed scanning into perfect gates. One o...
by Troubleshooter
Sat May 09, 2020 12:56 pm
Forum: Music Tech DIY
Topic: Project PRO2021 - A Pro-One keyboard synth
Replies: 1266
Views: 62917

Re: Project PRO2021 - A Pro-One keyboard synth

That is correct midi in LED reacts on note on/off but no gate LED
by Troubleshooter
Fri May 08, 2020 6:38 am
Forum: Music Tech DIY
Topic: Any ideas on a misbehaving x0xb0x?
Replies: 25
Views: 479

Re: Any ideas on a misbehaving x0xb0x?

Make sure you used 100nf as decoupling caps, trigger scope you 5v rail for drops.
by Troubleshooter
Fri May 08, 2020 6:33 am
Forum: Music Tech DIY
Topic: Adapting Guitar Pedal Schematics to Synth Levels
Replies: 7
Views: 282

Re: Adapting Guitar Pedal Schematics to Synth Levels

The hexinverter battery acid cv would be a nice example but the documentation just doesnt provide a schematic
by Troubleshooter
Fri May 08, 2020 5:57 am
Forum: Music Tech DIY
Topic: Project PRO2021 - A Pro-One keyboard synth
Replies: 1266
Views: 62917

Re: Project PRO2021 - A Pro-One keyboard synth

Hi, I checked all midi channels and also factory reset the whole cpu to defaults. No success. The scope shows data arriving on the cpu.
by Troubleshooter
Wed May 06, 2020 8:54 am
Forum: Music Tech DIY
Topic: Mutron Biphase Clone - Fabric Astronaut
Replies: 91
Views: 9466

Re: Mutron Biphase Clone - Fabric Astronaut

Beautifull project. Are there any benefits like a more original sound compared to the Duo-Phase from PedalPCB.com?
by Troubleshooter
Wed May 06, 2020 8:34 am
Forum: Music Tech DIY
Topic: MIDI to CV with autotune?
Replies: 8
Views: 306

Re: MIDI to CV with autotune?

If you look at the MidiAlf CV expansion board you should understand how to achieve perfect voltages/octave without tuning. I built 3 and the results where always spot on without visiting the calibration menu. It also provides tuning posibility's for every single note seperately. I tuned one to my MS...
by Troubleshooter
Mon May 04, 2020 5:59 am
Forum: Music Tech DIY
Topic: Project PRO2021 - A Pro-One keyboard synth
Replies: 1266
Views: 62917

Re: Project PRO2021 - A Pro-One keyboard synth

Hi Devin, long time indeed, I have been using cv-gate all the time so yes it is the first time.
by Troubleshooter
Mon May 04, 2020 1:45 am
Forum: Music Tech DIY
Topic: [PCBs] batteryACID CV (aka: IDOW Edition) DIST/COMP module
Replies: 77
Views: 8274

Re: [PCBs] batteryACID CV (aka: IDOW Edition) DIST/COMP module

Any chance of sending me the the schematic for debugging purposes?
by Troubleshooter
Sat May 02, 2020 7:28 am
Forum: Music Tech DIY
Topic: Project PRO2021 - A Pro-One keyboard synth
Replies: 1266
Views: 62917

Re: Project PRO2021 - A Pro-One keyboard synth

Hi everybody. I have enjoyed my 2021 for a long time but today I tried to use the MIDI input and all it does is give me a clicking sound on note on/off meggages. The midi in LED is working and I checked the polarity of the 2pole connection between turbo cpu and board A. Any ideas what could be my pr...
by Troubleshooter
Thu Apr 30, 2020 6:29 am
Forum: Music Tech DIY
Topic: AS3340 giveaway [CLOSED]
Replies: 22
Views: 461

Re: AS3340 giveaway

I would mind to have a pair for my PRO-2021 project. Thanks a lot in advance very nobel of you!
by Troubleshooter
Mon Apr 20, 2020 6:50 am
Forum: Music Tech DIY
Topic: Bi-N-Tic Filter Oscillating but not Filtering[SOLVED]
Replies: 3
Views: 165

Re: Bi-N-Tic Filter Oscillating but not Filtering[SOLVED]

Hey, I am looking to this one for a long time. How is it? Worth building?
by Troubleshooter
Mon Apr 06, 2020 4:48 am
Forum: Music Tech DIY
Topic: moog ladder filter mods?
Replies: 31
Views: 3407

Re: moog ladder filter mods?

I would not call the drop in bass a problem. Always handled it as a usable musical characteristic of that ladder filter. I don't buy the B brand but I have a real D, built a crowminius based D replica and built 2 yusynth D-filter's (for stereo applications). I just feedback the output back into the ...
by Troubleshooter
Mon Apr 06, 2020 4:26 am
Forum: Music Tech DIY
Topic: Presenting: Crowminius
Replies: 1038
Views: 124417

Re: Presenting: Crowminius

Hi, I would start looking at the components around the core's 3046. Maby you made a decimal mistake on all 3. Also look at the control voltage driving all 3 VCO's. A good visual inspection usually gets you there.
by Troubleshooter
Thu Apr 02, 2020 4:44 am
Forum: Music Tech DIY
Topic: EasyEDA and Silkscreens
Replies: 18
Views: 579

Re: EasyEDA and Silkscreens

Do not thrust the EasyEDA preview. Soldermask acts as primer for the Silksscreen. So silkcreen will not be printed on metal surfaces.
by Troubleshooter
Mon Mar 23, 2020 4:57 pm
Forum: Music Tech DIY
Topic: PCBs as Front Panels ?
Replies: 179
Views: 15682

Re: PCBs as Front Panels ?

Troubleshooter wrote:
Mon Jan 27, 2020 1:03 pm
guest wrote:
Mon Jan 27, 2020 10:58 am
that looks really good! is that going to be PCB or aluminum PCB?
Ordered regular PCB material. It should be stiff enough. Lets hope so....
90343679_2950837514975796_2188794752281870336_n.jpg
by Troubleshooter
Thu Mar 19, 2020 6:46 am
Forum: Music Tech DIY
Topic: Synthi options
Replies: 18
Views: 756

Re: Synthi options

Hi,

Very interested, I could do some hobby-cnc-quality-level panel prototyping work.
Also CAD design and woodwork are my thing.
by Troubleshooter
Mon Mar 09, 2020 8:32 am
Forum: Music Tech DIY
Topic: PCBs as Front Panels ?
Replies: 179
Views: 15682

Re: PCBs as Front Panels ?

Troubleshooter wrote:
Mon Jan 27, 2020 1:03 pm
guest wrote:
Mon Jan 27, 2020 10:58 am
that looks really good! is that going to be PCB or aluminum PCB?
Ordered regular PCB material. It should be stiff enough. Lets hope so....
Yes, it is even stiffer than the same thickness in alluminium.
by Troubleshooter
Wed Feb 19, 2020 2:48 pm
Forum: Music Tech DIY
Topic: Adding poly aftertouch to a cheap keyboard
Replies: 6
Views: 498

Re: Adding poly aftertouch to a cheap keyboard

Hi, First of all, If I would put so much energy in developping a whole poly aftertouch system I would at least starting with a descent keybed. A few fatar keybeds for example are easy to find. This way you can share your design with the DIY community and the project comes in reach for everybody. As ...
by Troubleshooter
Wed Feb 19, 2020 2:30 pm
Forum: Music Tech DIY
Topic: What's wrong with this schematic?
Replies: 4
Views: 307

Re: What's wrong with this schematic?

hi, 3 things I can think when reading this cirquit: 1.) If your Sine and Tri are allready out of phase they will subtract eachother. 2.) A diode dropout voltage will be subtracted from the waveforms adding silent periods that cause harmocics. This could be avoided by converting the voltages to curre...
by Troubleshooter
Mon Feb 10, 2020 10:33 am
Forum: Music Tech DIY
Topic: My first module schematic-a mixer. Feedback?
Replies: 10
Views: 536

Re: My first module schematic-a mixer. Feedback?

Maby add some 10 Ohm resistors in series with the power rails close to the power connector. Just for good measures....

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