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Psykhaze

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Everything posted by Psykhaze

  1. last but not least question : can i use serial registers (like DIN and DOUT modules) to plug 2*OLP3 in serial to a STM32F4 core> eg control 2*OLP3 chips from a single core? found this mod http://www.midibox.org/dokuwiki/doku.php?id=opl3_module_modified and want to make a 4 stereo OUtputs FM synth > 4 YAC512 under my extended control surface. thanks and good night regards, JK
  2. still right ^^ . already with the 4*(4x4)= 64 sparkfun button they will be useful. That's late i think i should better go sleep ^^
  3. oops, i shouldn't buy as much 1N48, got a thousand left xD thanks again btw =)
  4. Psykhaze

    RGB hue sweep

    Hi again, Count on me for 4 PCB , that will allow me to make some tests with these 5mm LEDs. The limit was 48 bits in total adressing ? I am a bit tired right now so i'll check TK code tomorrow =) merci pour tout et bon weekend aussi =) JK
  5. ok , had some further reading about all your work on the quad genesis. Impressive by the way. I had some misunderstandings about few things and was far from understanding everything ^^ .i think i'll get into just making an extended control surface for a double OPL3 (FM 1.4 module*2 driven by a STM32F4). Getting into a new synthesis hybrid module is maybe too much work for me. Working with VGM files isn't really my goal, i work alot with midi sequences or "on the fly" recorded sequences from my m-audio keyboard or my akai mpd32 MIDI interfaces. I am more focused on the design of the control surface to work the FM sound "textures", and as you said maybe FM 1.4 is already a good "start" , as well as it is well documented and i realize that i'm far from knowing all that i need. Big up again to all your work , i'll get you tuned with my work if you want. regards, JK
  6. Good evening everybody ! I found back 20 clickable detended rotary encoders, wich have 3 pins on bottom for the 'spin' and 2 pins on top for the click (bourns branded if i remember well). My question is the following : with a 1n48 diode security, could i handle the click (SPST) of my rotary encoder as a button on a DIN module? thanks in advance, regards
  7. Psykhaze

    RGB hue sweep

    @latigid on, @TK : Dudes,such a nice work!! :o just what i wanted to do about the sparkfun buttons. If i understood good TK told that 64 RGB LED could be driven, and even more? I am just planning in making a 4x16 RGB BLM for sequencer V4 with sparkfun butons. Other buttons would be "monochrome". ^^ Do you think this kind of led would fit ? http://www.ebay.fr/itm/252197462630?var=551032876050 thanks for your advice, good evening, JK
  8. Thanks for the quick answer , i'll have a check on it. Good evening, regards, JK
  9. @latigid : I found the page , just wanted to be sure. I'm so excited to finish it that i do not want to make mistakes, i couldn't beg myself if i make a stupid error ^^ . thanks for your quick answering , regards, JK
  10. Hi sauraen, first of all, a big thank for your answer =) wasn't expecting something that precise so quickly.You just answered to everything and even more. After a -very quick- youtube tour, i get some of the audio difference between the chips : they sound very likely, but not exactly the same. To be honest i like them both very much. I first got into the midibox thing through the SID v2 synth 7 years ago because my first computer was a C64 . Found crazy that i could make a synth with. I stayed tuned to ucapps until the MB-6582 : to me one of the best projects here : powerful electronic & external design, nice PCB design , simple assembly etc... thanks to wilba and smashTV again . The key to me was that optimized control surface that wilba made.I got my first MB-6582 almost finished, filled with 6582 chips. But on my second MB-6582 pending, thanks to the PCB design, i will make a hybrid setup : half 6581 and half 6582. Sorry for telling my life but this was to introduce the following question : Do you think it could be possible (and not too hard?) to make a kind of "hybrid" FM synth with a 2 stereo outputs OLP3 and 2 stereo outputs OPN2? In short words instead of a core driving 4 OPN2 (>quad genesis) , a core driving 2 OPL3 and 2 OPN2 at the same time,sharing a same Control surface ? (I REALLY like them both ^^) I love designing Control surfaces, designing the PCB and frontpanels ,choose simple and costless components solutions. And good news, my work is programming code =) i'll have a review to your code uploaded, i should understand some, or ask some question then Some parts of the FM synthesis concepts should be very common between the two chips? this is what i need to be explained clearly, some dark zones stay there for me I'll check out more in details TK virtual interfaces to the FM synth 1.4.if you have any useful link that may help me understand FM synthesis more deeper i take it =) So to summarize,i'm that kind of crazy geek who (now) have some few skills and who wants to help you in going further into that project. I think by making a bridge between your project and the current MBFM 1.4 trough designing a "easy-to-use-but-complex-enough Control surface" for an hybrid design we would maybe get the community interested into your work. The big point to me is the control surface. I like leds and button,and most especially illuminated button (who said sparkfun?) . new components now make some HUI possibles . But we have to discuss on howto make a compromise between your design (a little too complex) and the current MBFM 1.4 design (too simple) I have some time to spend in, and the MBFM project need a new breath. You started it ,i'll try to follow ^^ Feel free to email me we could get in IM contact. Best regards, JK
  11. Hi there ! A simple question with maybe a complicated answer: - Is there a simple way to drive rgb LEDs , to make a multicolor BLM ? From what i understood DOUT module only provides ON/OFF outputs and AOUT module seems to be more designed to drive old analogic synths than LED. Thanks in advance for your answers , this subject may have already been covered but i did not found the answer simply. regards, JK
  12. Hi there, just finishing up my first MB-6582, powered with 8*6582 chips. Instead of usign the big C64 supply, i've choosen to power it trough a regulated external power supply. it deliver regulated 9V DC ,5V DC and ground at around 1500 mA. Thought it would be enough for 1 synth so,before connecting 9v,5v and ground directly to J4 (no switch between power and J4), i was thinking about using the great power switch supplied with the MB-6582 kits from smashTV. My question is : Is there any thing i have to respect to use this power switch or could i solder my wires directly on it? could provide photos if this is not clear. My best regards, JK
  13. Hi, Damn,this control surface oO great stuff! I was planning to build a FM synth 1.4 , with a old 8-bits PIC core and the old HUI, based upon the old OLP3. So I have few simple questions: - Does the MBHP genesis board (available from smashTV) offer a FM synthesis (sound) much like the OLP3 ? what are the differences in the great lines? (there is not much audio examples) - Are the synthesis chips easily availables? - Does the fact of being connected to a STM32F4 core will offer more new features? - Can you please describe in few words and based upon your picture what parts of your control surface are dedicated to? it's kinda messy without explanations. I would like to ehance the Midibox FM 1.4 , especially regarding the control surface.but i thought something half way between the original FM synth and your control surface. I saw something looking near to the MB-6582 in terms of size.. Thank you in advance for your answers, and please beg me if i misread something. sincerely, JK
  14. following to your description, this kind of schematic for balanced stereo audio mixing would fit ? i could include it in the audio board for each channel and then make a 16 channels mixing module.
  15. I will use one balanced output per channel, and then mix all 16 channels together. Here comes the "tree" i think ? Have you got schematics of the job you've done with yours op-amp ? i understand the principle, but as i always says , a beautiful drawing is better than hours of explanations (wikipedia drawing of the good schematic will fit perfectly!). I've studied op-amp during my studies , but my lessons are a bit far away... i've tried a search on digikey with keyword 5532 in the section op-amp and did not found the 8 pin DIP you are talking about. i'm having a lot of fun about designing this mixer by the way :) sure it will be a great project !!
  16. b> Good to know, i didn't noticed this when i read the datasheet - i will add balance for each stereo channel this way ! e> ok then , i wasn't sure but now you tell me it becomes more clear. a) Then my problem is how to combine the 16 channels? just soldering the mixed outputs together will combine them ? b) Do i need a special audio processing component to combine the 16 channels ? j> So if the serial control is adressed I2C , i need to make a channel board with a separate PIC on each in order to be able to chain the audio modules . a) wich kind of PIC do you advice me , my goal was to obtain chained audio modules controlled by one core (see my drawing on my first post), as the I2C MIDI modules are. b) is PIC programming for I2C port adressing hard to make ? i mean will i need to deal with complex ASM? thanks in advance for your answers, cheers, Jerome aka psykhaze
  17. oh god i had a post from the inventor of the MBmixer !!! so happy :) Glad to hear from you lylehaze , i don't think that such anybody is much qualified than you to help me with your experience on your mbmixer :) So for software i'll choose C language, as my knowledge is better than in ASM . I'm glad i understood the main things on the technical datasheet of the TDA :) I think i will use 1 core to drive each audio module because i need the mixer to be reactive. Happy too to benefit from your help, i'm sure it will be useful, i do not ask you to be involved but your advice will help me for sure ! VU Meters is a cool idea from hawkeye ,and your way to include it seems to be a great idea too. Regarding to the control surface , i planned to make it based upon a Midibox64 as well as described on my drawing. Will separate it from the audio modules driving , even if there will be some kind of link somewhere in the software, but i will try to make it modular as possible. Will join you soon at your gmail adress, hope we keep in contact, cheers psykhaze
  18. hi Hawkeye, thanks for this quick reply, you brainstormed quicker than i did myself and there are many points i agree with you , even if some would be hard to complete due to some technical difficulties , as each components and my budget have limits. I'll try to answer all your points first : a) Adding FX sen woduld require 1 input by channel , so it would double the number of audio modules , and of course latency => it will multiply *2 the number of audio module and necessary data to drive . Another(s) core(s) will have to be used for sure in this case - do not sure i will include first but would like to solve the problem b) TDA7439 doesn't offer panning control, as it even offers tone control , so another component will be required to control only panning - do not sure i will include first but would like to solve the problem c) Using motorfaders is a great idea, but after my researchs , motorfaders compliants with MF module are hard to find and not very cheap - would need a updated list of motorfaders compliants with MF module that are not sold out - do not sure i will include d) Really great idea! i include that in my design immediately e) Modular chained modules was my goal, but keep in mind that the TDA7439 mixes a group of 4 stereo channels. Then you have to make a "main" mix between the groups of 4 stereo channels to get your master mix , it's like a tree f) Planned to use STM32 core as well as available at smashTV shop, but if LPC17 core is better, would use this one for sure g) Could you remind me the chip wich control the LED Bargraph ? by output level fader you mean gain ? h) do not understand the utility of such a thing per channel , or i misunderstood something i) This would be available by the programming but as well as you told the big LCD over each channel for control , the modular stuff would be grouped up to 16 channels .If you double everything you can go up to 32 stereo channels w/o FX sends (or 16 with FX sends) and 11 audio modules I think i'll try to begin simple before making THE BIG MIXER ! ;) however i would like to solve the problems of FX sends and panning if possible, but i have not out-of-the-hat solutions to give for the moment Cheers, Jerome aka Psykhaze
  19. Hello guys (and girls ? :) ), Actually working on 2 MB 6582, a MBSeq V4 with 64 buttons matrix and a TR9090 , i was wondering how to mix all my audio outputs when i encountered the MBMixer project. Good project by the way but seemed a bit outdated as well as PGA4311 seems to control only volume output and balance. After a look on digikey , i found TDA7439 from ST microelectronics, (specification sheet attached) CD00004906.pdf a three-band digitally-controlled audio processor that allows to control tone AND volume of 4 stereo channels (for each channel independently , from what i've understood from the technical sheet) and wich is driven by IIC. Then i got the idea of making a 16 stereo channels audio mixer (layout of control surface attached) driven by one (or 5?) core module(s) with a control surface based upon AIN / DIN / DOUT / LCD modules (i plan to use omron square illuminated buttons for mute and solo buttons en-b3w-9.pdf and pots for equalizers of each channels) I've thought a bit about the possible interconnections between the modules following to the descriptions seen on ucapps.de, and i made a drawing . So as well as Core module manages to deal with I²C bus with IIC MIDI module , i thought that it could drive 5 (or 5 core module driving each) audio module made with TDA7439, with a little bit code and pcb making of course . There would be 4 audio modules to control each group of 4 channels and 1 audio module to control the master output (the 4*4 group of stereo channels, or main mix in my drawing). My questions are the following: -Could i write the code in C instead of ASM , as well as my knowledge in ASM is limited ? -Did i made any mistakes in the TDA7439 technical datasheet understanding? -Driving 5 audio modules with one core through IIC wouldn't cause too much latency ,and in that case how much (and wich) core module should i need? -Is somebody else should be interested in this project ? (being more than one person on a project allows the project to grow faster!!) -Have you got any pieces of advice to give or any ideas ? Thank you in advance for your answers, cheers from france, psykhaze
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