bionix

hiho, i'm a noob with midi coding - just made some opl3 stuff under freedos. but the interestening part of this chip here seems to be the parallel engine. remembering the discussion about mixer design (somwhere in the design forum here) there were two chips (cs8414 and cs4334) which are usable to do some ad/da. some analogue device chips are also usable to get 192khz/24bit and all this stuff is about 5$ for each chip (except the crystal chips). So just from an idea: transform the analog audio by SID/OPL3/whatever into DA and process it with multiple cores (the prob chip). that would also kill some common problems: audio transformation (ad/da) because you already have an digital audio signal, which could optional transformed to analogue. there would be 2-3 outs: tos/spdif, analogue. wouldn't be fine? the only real and big problem is audio processing. many threads exists to the nice little effect unit miss parker. but the prob chip could do the same for low cost. it's just an idea ;)

soweit ich mich erinnere, stand doch beim durchtesten des pics (spannungsmessung an den versorgungsleitungen) das der pic zwar kurzzeitig nen Kurzschluss überleben "kann", aber bei längeren definitiv geschrottet wird. Ich denk mal, dein Kabel oder eine Leiterbahn auf dem Display zieht einen Kurzschluss, ggf. haste dich auch einfach verlötet. Miss mal einfach durch, ob die Pinbelegung vom Board auch so wie gedacht auf dem Display ankommt, speziell die Versorgungsleitungen.

i wanted your little plugin, but while tryin to register myself an error occured: Parse error: parse error, unexpected '}' in /web/temp/getpasswd.php on line 186 please fix it :) wanna have the controlling vst ;)

ok, we should - if we want ;) - discuss that in the new thread. the idea of optical in/out is just to eliminate some ground loops with different connections between laptop/pc soundcards and f.e. midiboxsid etc. because analogue signals from soundcard (at my laptop audigy zs 2) can get ground loops through their psu, but if they switch to optical mode, there's no ground loop. that's because the da/ad conversion is proccessed directy in front of the analogue output and the digital signal (the real signal, not the signal level) wouldn't get touched by transport over digital ways. but some reported, that also cinch and spdif out ports got ground loops, so i decided to ask about the optical (TOS) way. currently i'm at testing optical out/in conversion, to build such a little module. but i recognized little problems with different variations of data streams (from vendors and signal types like dts/dd2, raw etc.) which cannot be handled through above chipsets. maybe i find a cheap solution - this could take some time, because the current cost per channel is around 15-20 euro. remember: it's just a signal transceiver from analogue to optical and back. best regards...

hmm. i made some nice connections over lan to sync and use 2 pc's and 2 laptops (pc's are just my vst hosts) via ipmidi (nerds.de) and of course some midi cables ;-) but it seems that ipmidi isn't able to send/receive clock data.... :-( now i wanna build the little clockbox to kill that problem ;)

ja das war klar, und wurde auch sofort erledigt ;) ich dachte nur, das der evtl. nich ganz passt...

hmm.. could you use cs8414/cs4334 to support optical/spdif?

sorry, i didn't realized that the m-audio quattro doesn't have any digital outs. these are all only 6,3mm?

warum? was is daran besser? gabs da nich mal ne formel zur berechnung? *grmpf* hatte nur a bisserl etechnik im studium. lang lang isses her ;)

hmmm... pollin.de got some (there is a thread about these) and conrad also distributes some.

oops i did it again ;D http://www.pp.iij4u.or.jp/~shu-nkmr/SN-DAC0501.html contains a VERY WELL schematic for DA/AD conversion via s/pdif to chinch (not digital) out. these chips cost between 5-7 euro, so it's cheap to build smth. like that. i think most cost would be the adapters etc ;-) best regards. btw: i start buildin this unit at weekend, if conrad got these chips in stock ;) damn, they have not. ok, but i found a really cheap distributor (strange to find some, which are really cheap, schuko.de sells for 12€ / chip, but this one for ~6€) http://www.futurlec.com/cgi-bin/search/search.cgi (sells also ONE chip if required, the other only distributes complete packages ~25 pieces or smth.) so here is the (chipset) partlist: 1x CS8414 96kHz Digital Audio Receiver IC (4.50 USD at futurlec) 1x CS4334 96kHz Stereo D/A Convertor IC (2.90 USD at futurlec) 1x L7805 (the japanese version name: njm7805) ~30 cent and a lot of standard resistors and caps, some connectors (spdif, chinch in [u0 seems to be a chinch in, or doesnt?] , chinch out and finally an 8v supply, but it should run with 9v fine too (look, there's a regulated psu behind the supply input, 7805). best regards.... hell, that thing is interestening :P

Ok, back to theme: i'll try to figure out the problem, because it happens even on my vst server (grmpf, p4 with zahlman switch psu, but still noisy!) in my op. you could "work around" the noise by using optical or digital audio out. your sound card should provide smt. like spdif/tos/etc. so i looked for smth. to change the signal from digital back to analogue, because my mixer and also the audio (xlr) are analogue. this project http://sound.westhost.com/project85.htm could be interestening esp. to kick our noise problem. other (professional) systems are avaible, but not under 200€ (rme produces some DA/AD changer). let's give it a try. first of all, someone else should try testing the problem itself (noise while psu at net) with digital audio out, because i have really nothing with an optical input, just a few optical outs. :-\ if the problem disappears, we could try to build the DA/AD changer from project58. any other suggestions? best regards...

L78xx CAN become hot, so i used a standard heatsink for them. Some reported that the MOS8580 (don't know, if even the 6805) get very hot after a while. So you could also place a heatsink on it. (look at the small c64psu pcb at the german forum ::) ) best regards...

So, hätten wir das: Wesentlich kleiner, aber funzt. Board: http://bionix.burningmountain.de/c64_optimized_v2.brd Schema: http://bionix.burningmountain.de/c64_optimized_v2.sch Rest kann man ja bei Bedarf daraus selber machen. Hab mal den "Dummy Pin" für die 3pin LED sowie einen 4pol pinheader für das switch interface drauf gesetzt. Ansonsten wurden nur die Wege etwas "verkürzt" :-) Nachtrag: Es ist nicht EINE Brücke mehr drin. Allerdings kanns ohne Ätzen ein wenig fummlig werden :p

also, ENTWARNUNG. das pcb stimmt. hab nen unsaubren lötpunkt gehabt *grmpf*. Fehler war also Lötseitig und ist behoben. Noch mal als Nachtrag zum Thema "Kann man denn den 14Vdc messen...", natürlisch: Nimm den 5V Kanal (DC) ab, somit müsstest du ja eine gemeinsame Masse und einen 9V Kanal haben, denn Masse wird ja auch vom Rectifier geliefert. Ergo, eine Messung bei NUR 9V AC an, sollte nach dem L7809 auch 9V an dem 14VDC Port sowie dem Minus (beliebige Massestelle oder am besten gleich den Minus vom 5V Pin) bringen. Bei mir warn's 8,99VDC *freu* Und der Kondensator (16V) lebt noch, mit grosser Beule, aber er tuts :-) Verbesserte PCB kommt morgen, da dort einige Kabel bzw. Lötsachen etwas einfacher verlegt wurden. Fiel halt bei der Löterei auf. Ahso, und nachgemessen hab ich auch noch mal, mit ziemlich viel Abstand dazwischen (2-3 mm pro Bauelement) ist die kleine Platine ca. 35mm x 46mm. Shit, nu hab ich wirklich zu viel Platz. :-[ Beste Grüsse...