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The Keyboard Corner
Synths, pianos, software, analog, digital, modeling, virtual instruments, programming tips - this is the place on the web for discussions, debates, opinions and assistance...and the occasional sports thread.
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Trending posts on MPN
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By Jose EB5AGV · Posted
Well, things are not easy with the Venom! After the apparently good test of +/- 9Vdc generation (without any load), when I got from Mouser the replacement OPAMPS, just installing one on the PCB made the switcher go nuts. So the OPAMPS were not the root cause!. Oh well... I had to replace again the switcher IC, as even with limited current from the lab power supply (set to 9V/0.5A), it failed while trying to find the problem. Also, I was not sure about that switcher IC being not a counterfeit, as the labelling was almost invisible after cleaning, and the surface was rough. So I ordered legit ones from Farnell and did, again, the replacement work (note: they are 3x3mm, I wrote before 5x5mm) These are the good ones: Here you have it replaced... the small added wire is because one trace was damaged and this wire bridges the missing connection, luckily the same than the adjacent one: It seemed to be better, but still with just an OPAMP installed, the negative voltage (-VA) decreased from -9Vdc to about -4Vdc and the IC got pretty hot. I found the service manual for the Venom online and traced on the schematics all and every point the -VA voltage was present. I discarded all and every componet (capacitors, diodes) on the circuit. All were fine!. SO I removed the only OPAMP on the circuit... and -VA was fine again 😳 Then... what if the switcher circuit had a problem?. I checked the coils and, BINGO!, one of them, L2, was shorted. Oh my!. That explained while, under any load, the switching of a basicalle short load, got the switcher transistor for that rail pretty hot. Basic electronics 🤣! Now, well, such a miniature SMD 10uH/0.49A coil was sure not on stock on my lab... But, well, I was not going to wait for another components order, so I built them with some suitable toroids. I selected the T37-43 ones, as 5 turns would be enough to reach 10uH, according to an online calculator. Here you have the contraption, first measured and then installed (I replaced also the adjacent coil, as it seemed also slightly damaged): Now the test!. FIrst +VA Then -VA At long last!. I added the other four OPAMS and it kept working. I added some glue to keep the coils on place: And this is the overall view of the finished board: More to come soon! Jose -
By Paul Woodward · Posted
Way off your ‘spec list’ but, in a pinch, Korg Module can trigger one hit samples as long as they are in an audio format i.e. MP3. I tried to replicate the wave trigger function of the Yamaha CK and it worked so I had the Sledgehammer and Queens one vision intros etc. Additionally, Gadget could be set to have gadgets that receive on all 16 channels and, with a controller that has pads, they could be set to trigger individual sounds or samples. Cheap and flexible option maybe. -
I'm still waiting for the first musician to build a Windows VST rig using a Steam Deck (or Asus Ally, Lenovo Legion Go, etc.) Cheers, Mike. -
Paging @El Lobo. Your zombie thread has reopened in 2024, and you are invited to post again. That's @El Lobo to the Barbara Dennerlein thread please. 🙂 Cheers, Mike.
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This nails it. My bassline groove is actually better with my LH than RH, but I need to focus, and not be distracted. Cheers, Mike.
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In MPN’s GEARLAB
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By charliepersol · Posted
I just bought one used two days ago. I had in the past (a very past) the original ARP Odissey and an Avatar (the guitar version of the Odissey). They sounded quite differenti, and now I understand why: two different version of the filter. A friend of mine still have the all black one with coloured sliders, which Is again different, maybe two poles filter? Anyway the Behringer sounds good but a bit differenti too. My ARP had a ring modulator I used to build fabolous bell like sounds: metallic, full of harmonics. The kind of sound you can hear on Japan Tin Drum or Oil on Canvas albums. Until now I couldn't recreate this sound. Neither the Avatar did. Just my ARP Odissey I sold for little Money :( -
In V.A.S.T., be it the original V.A.S.T. or the newer vaster V.A.S.T. with Cascade and Dynamic, there are several ways you can use internal DSP sources with Samples: 1. Samples only 2. Internal DSP Oscillators only without any Sample 3. Samples mixed with internal DSP Oscillators In the new V.A.S.T., you can certainly use a multi-sampled Keymap, alongside an internal anti-aliased DSP Osc, e.g. a 2-block SINE+ for a single Layer, or even an aliased one like the old SAW+. For larger AA DSP Oscs, e.g. the 4-block SAW, you'd need to use Cascade Mode, a passthrough signal and a Mixer ALG. So these aren't mutually exclusive. Instead, what the manual seems to indicate is that if you want to do a traditional analogue subtractive synth, then you'd rather not use a Keymap, which makes sense since analogue subtractive synths don't use them at all. You can still use a Keymap's sample Envelope if it is set to Natural, even if the Sample itself isn't sounding via the Layer, say, if you have simply a 4-block AA DSP SAW. That SAW block effectively cuts off any of the Sample signal. However, as the AMPENV mode is set to Natural, it is the factory AMPENV for that multi-Sampled Keymap that is applied to the Layer. The Natural envelopes have more details than can be produced with a User AMPENV. The thing that happens with setting the Keymap to Silence is that it sets each key's amplitude to the same maximum amplitude. Maybe that's what you need in a certain program, but sometimes, if you are doing an emulative program, you could be better off actually referencing the emulation's Keymaps Sample although the latter isn't heard, with the corresponding Natural Envelope, or of course, you could just go into User Mode and make your own envelope. Hope this helps. -
Sweetwater might accept to deliver to Canada, but you will be charged transport accordingly and as anything going USA to Canada your item will go through customs and it is always possible to end up with extra fees - sometimes very expensive. I personally had a very bad experience about 10 years ago and promised myself to never import again from the USA unless the seller confirms on paper he pays for all possible customs and duties extra fees. Buying Kurzweil products in Canada has always been complicated. In the 1990s a few stores in the province kept a couple of them, but if you wanted something they didn't have you had to order sight unseen and wait months to get your purchase. That is how I bought my MIDIboard, K1200 and finally, around 2000, a PC2X. I hated the Fatar action on the PC2X from day one and swore to never buy a keyboard sight unseen ever again.
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