Building a squencer with clocked logic and ram?

Musica_En_Fuego

I've been reading the CMOS Cookbook for the past few days and just had a thought. How could I make a sequencer that can record inputs and with a flick of a switch, play it back infinitely? And maybe have the ability to modify the playback sequence and reset it back to the default sequence? I know some of ya'll maybe thinking, "just get a DAW for that!". But I want to do it at a hardware level.

synaesthesia · Posted: Thu Sep 13, 2018 1:42 pm Post subject:

My first though was to use a micro-controller, but I guess you meant discrete logic, so I am trying to follow your thought.
You could encode the sequence in binary instead of using multiplexed pots. Then use several shift registers in parallel for the data and manipulate the outputs.
Either switch between outputs, change the order before decoding, or even apply some logic to them.

PHOBoS · Posted: Fri Sep 14, 2018 3:43 am Post subject:

Do you want to store/play analog or digital sequences ?
If it's digital it is something I have thought about too after watching the excellent Building an 8-bit breadboard computer
series by Ben Eater on youtube. With some of the parts of it you could do it. A (none DIY) microprocessor would
make things a lot easier though, but where's the fun in that Laughing

I do like the shiftregister idea. it gets rather large if you want to store a lot but it should be a bit easier to control
than RAM. Downside is that you don't have much control over it and of course it can't hold sequences without power.

piedwagtail · Posted: Fri Sep 14, 2018 9:02 am Post subject:

http://electro-music.com/forum/phpbb-files/eti_sequencer_759.pdf

File already here
There's at least three magazine projects, the Oberheim and SCI products...
Could do the link in a CPLD.

R

Steveg · Joined: Apr 23, 2015 Posts: 184 Location: Perth, Australia

This might also have some ideas you can use: https://www.youtube.com/watch?v=_EJQO4cWgFM
Elliot is hexagon5un here on electro music.

Musica_En_Fuego · Posted: Sat Sep 15, 2018 4:56 pm Post subject:

NOISEBOB · Joined: Oct 13, 2019 Posts: 33 Location: NOISE

what happened to this project?

dk · Joined: Feb 12, 2019 Posts: 115 Location: Europe

I was just watching a video of Suzanne Ciani yesterday describing how she works with sequences and thinking about this very same thing. It seems that this is where I'd probably resign to finding someone on the net who's programmed a PIC to do the same thing for $5, though. That link piedwagtail posted looks intense Shocked