Discrete Summation Formula Synthesis Follow-Up (I didn't know Octave did this weird thing)
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- Опубликовано: 12 сен 2024
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8000Hz / 8bit was the default on some 90s era workstations and later linux /dev/dsp so thats where that comes from. We don't want to lose compatibility, right?!
Thanks, Prof. Aaron 😁
My favorite examples of artistic low-resolution digital sampling are on delay pedals that use a PT2399 echo chip, which was originally designed for surround sound echo/delay (with delay length typically on the order of the 10s of milliseconds). In order to use it with guitars/instruments, and have a reasonably long delay time, say 800ms-2000ms, you have to downgrade its sampling depth, which makes the longer delays distorted, and when implemented just right, gives really satisfying degenerative decays and interesting infinite loop behaviors.
My favorite implementation was the Biyang Time Machine, a very cheap import circa 2008, and even then my guitarist and I each bought three of them (they were cheap and we were touring), and they each sounded awesome, but slightly different.
I’ve since stocked up on PT2399s for my own projects. To hear an example of those specific pedals, look up “The Farewell Monument - Remains of Mountains” - it’s the primary effect during the latter 2/3rds of that track.
Bonus, if you listen to “Remains of Mountains”, the guitarist (Matt Bragg) delivers what I consider the most beautiful and wistful sounding e-bow performance ever. He really mastered that thing’s idiosyncratic function and sound.
These are not classical digital sampling (pulse code modulation), they use adaptive delta modulation and a 1 bit delay line. Means you trade length for fidelity.
@@reneschmitz4845I was not aware of that. I will have to revisit those old projects, and wrap my head around what they’re doing, now my curiosity is piqued. It’s been several years, but I still have a handful of schematics for some bucket brigade delay circuits, and the PT2399 data sheet has a fairly versatile typical application circuit included if I recall.
24 bits is perfect for muslimgauze
Is your audio hardware capable of dealing with 1-channel 24 bits audio?
I was using an RME Fireface 800, so in theory, yes? Although I'm not sure what my Macbook M1's own DAC is capable of.
in matlab it sounds different than here even with soundsc set to take 8 bits
I guess my soundcard doesn't support 8 bits, maybe? It is supposed to default to whatever your soundcard has as the default configured in the system
There might be a difference in how Octave and MATLAB work (I didn't get around to trying it in MATLAB).