can cmos divide to musical 3rds, 4ths, 2nds,etc???

loss1234 · Posted: Sat Jun 21, 2008 7:13 am Post subject:

blue hell: ok. that makes sense.
and then i could use the 4046 to multiply by a new division. or i could use another divider to divide again.

hey, isnt the 4089 a rate multiplier? or does that do something totally different? anyway, it seems there are lots of possibilities.

had anyone heard of that HUGHES chip i mentioned?

thanks.

loss1234 · Posted: Sat Jun 21, 2008 7:16 am Post subject:

jnuary

yeah now that blue hell pointed out the thing about having to connect the reset back to the division, i can see how you can get different divisions with the same clock. and i will have to study up on the OR gates.

i am trying to read the chapter in the cmos cookbook right now on how to use gates to get different divisions.

ALSO KRUNKUS-that excel table sounds awesome!!!

thanks all

jnuaury · Posted: Sat Jun 21, 2008 7:21 am Post subject:

the OR gates i mentioned are just simple diodes not a decidicated cmos chip

i should really be careful about my choice of words....

Blue Hell · Posted: Sat Jun 21, 2008 7:31 am Post subject:

loss1234 · Posted: Sat Jun 21, 2008 10:52 am Post subject:

jnuary

no, i knew you meant diodes...but i need to learn how to do those as ors as well.

so, i TRIED the 4046/4017 combination, and then to be able to hear the frequency's a bit better, i put them through a 4040 to bring them down to a lower octave. i got some very nice musically useful stuff, espcially on the odd numbered interval outs.

this is a great new realm and i am not trying stuff with a guitar being squared, being fed to 2 4046's, one being multiplied through a 4024 and one through a 4017 and then both of those being fed to more dividers and mixed.

and then i want to use those outputs as control ins on things like the 4018 or data ins on shift registers, hook up a clock or two to drive the shift registers and mix that all together and, voila, filter it, and end up with something crazy!!

how does that sound?

Blue Hell · Posted: Sat Jun 21, 2008 11:07 am Post subject:

loss1234 · Posted: Sat Jun 21, 2008 1:43 pm Post subject:

well i dont have much room left for mp3s on this forum but MAYBE i could delete some old stuff

you got to hear this stuff

Blue Hell · Posted: Sat Jun 21, 2008 1:47 pm Post subject:

loss1234 · Posted: Sat Jun 21, 2008 1:51 pm Post subject:

hmmm

i guess i forgot someone gave me an increase

i will be posting soon

CJ Miller · Joined: Jan 07, 2007 Posts: 371 Location: 127.0.0.1

Great topic! This stuff is amazing fun, and quite simple. It's surprising that synths and especially sequencers and drum machines don't make more use of these techniques. I wish I had some idea about this stuff when I started messing around with audio circuits, but I was scared away from CMOS until recently, for whatever reason.

It seems to me that the whole divider/multiplier confusion is caused by number of pulses vs duration. If I send a pulse into a circuit, and for every input pulse it sends out, say, five pulses - then it is multiplying the number of pulses while dividing time by 1/5.

loss1234 · Posted: Mon Jun 23, 2008 5:49 pm Post subject:

well i have been reading my copy of the cmos cookbook so much it has now fallen apart-literally. so i am now ordering another copy (and fredriksens Audio intuitive ic operational amplifiers)

anyway, i am also reading the TTL cookbook but i am not so good at translating the old chips into lunetta usable stuff.

anyway, i will post a sample soon