at the beginning I didn't like my CS30 synth. i was mad coz it was impossible for me to get rare Yamaha custom ic's. Now i love it. thanx to my friend i've managed to add few modifications. i also own cs40m but it's faulty ;) i'll try to fix it :D http://www.jeanmicheljarre.pl/radek/studio/Yamaha%20...

i've managed to fix some things in cs40m but it still acts weird. the knobs are not corresponding - i move em and still i can hear weird sounds comming out of it keyboard works, pitch knobs also, modwheel too the thing that is not working: vco, vcf, vca, eg sections what can cause problems? psu is f...

make simple mod to get triangle waveform

oh thanx a lot !

Hi there! CPU in my OB-12 is damaged I've contacted Viscount and they told me they cannot help me. I need bin file to program new cpu. anyone can help me?

first check all connectors and cables. had same problem with 2 of them

d50ve or sound diver

ad1. no
ad2. no
ad3. yes. all notes have same tone eg e3 sounds like c5 g6 sounds like c5 etc
ad4. envelope works ok. sounds distored/overdriven. i'll try to record

Every note has same distorted sound... i dont know what can be wrong. i can edit parameters even load sounds via tape. but as i mentioned... sound is harsh distorted and every note sounds same... what can be wrong?

the only thing that i did to my ob8 was changing resistor and capacitor at the output. sounded better!

anyone tried Juergen Haible's multifilter in ob8?

http://www.jhaible.de/hjob8mod.html

i had obxa and own ob8 atm.

ob8 i think, has nice arp/seq, page 2, more mod possibilities

using resistor and capacitor u can change output sound - read please j haibles modification

8048 and 8049 are programmable cpu's. if you have os you can program both

here's OS for polysix

http://www.jeanmicheljarre.pl/radek/pcb/KLM8048.BIN

and scaled down pcb

i have only ob-8 with dsx...

calibrate voice 2 board using service manual

check if there are no missing connections. i doubt that cpu is damaged