My buddy Brett Gossage and I built this Z80-based audio sampler back in 1987. With only 64k of RAM, it could store just 3 seconds of sampled sound. It's now got problems with scratchy pots, severe mains hum and weird aliasing noises. If you want to hear how it sounded back in 1986 - http://youtu.be/OnwTFE1socs.
Brett's YouTube channel: https://www.youtube.com/user/Midiking
Brett's YouTube channel: https://www.youtube.com/user/Midiking
Some archives are not complete. I know that schematics of a retro computer of the early days have to be somewhere, but I can't find them. Complete years are untraceable. Recently I found two decades of electronics magazines with nice stuff in it. It was archived by one of the writers. He scanned all of his personal copies. Many publishing companies neglect their old publications, that is very sad. Where is the pride of the achievement?
"which… my friend Brett" kadr na ziomka, a ten w innej czasoprzestrzeni XD
The whole things a work of art. Poetry in motion.
I'm very impressed. What would this or a comparable commercial unit cost in its day?
It's a great video
I probably have most of the parts needed to build such a thing, excepting maybe the analog stuff. I can also volunteer to do a data dump on one of those 2732s, if there's any desire on your part. Now if there was only a board available… ๐
This is really great work guys. I've been using home made Z80 computers for nearly 30 years and back in the early 90's I was learning how to sample and play sounds with 8 bit ADC's and DACs connected to the CPU bus. I have MIDI ports to play notes at different pitches. I used lots of the Z80 NOP instruction to make a software delay and depending on where I jumped into the delay determined how many NOPS got executed and the length of delay changed the sample playback speed and changed the pitch.
Ground loop is the party p$%per.
Wonderful. My frustration in 1985 was not being able to have access to multiplex counters. I got the polyphony software going and midi in/out/thru routines but the project ended because of the costs for 16 bit and lack of access to specialized VLSI. Then a few years later I saw the Emu Emax II 16-bit sound system in a shop and understood someone else was before me with a commercially readily available product. I bought it. Actually having no clue there was already the Emax 1 and Synclavier but heard a wisper about the existance of Fairlight's CMI. There were pop songs giving a hint to that.
Wow, this is one of the rare videos when I have to login to YouTube and leave a comment. Just to say how great this project is. There has really gone a lot of effort in it.
You people are Gods of digital (analog) electronics.
SAMPLE ITS INTERFERENCE NOISES
Is it 4116 Dram in there ?
Thats pretty impressive! Only 2 years after the ensoniq mirage. Sounds like your just needing a touch of filtering into the dacs.
awesome project man! something else to add to the 'design and build' todo list. doubt that I've got enough life left on this planet to built all these things though, lol. that's what pee's one off at the age of 45 – it's not that the body starts slowly acting up and that things that used to point north, now hang deep to the south, but realising that you're halfway through and have achieved only a smidgen of that what you wanted to do…
suddenly, the thought of immortality doesn't seem so boring after all ๐
cheers for posting fella!