This is definitely enjoyable and impressive for being done in a browser. It covers some of the core bits of a prototypical acid set up, but there are some basic things missing.
The "909" section only has 4 sounds with some (4?) different velocity (think loudness) levels. The real thing had 26 knobs to adjust the 10 different individual outputs (plus L/R) of 11ish sounds (ride and crash cymbals are on separate outs, but open/closed high hats are on one out). The "303" has 4 knobs but the real thing has 6 and the delay would be from some sort of external effects, so really it's missing 3 controls (tuning, env mod, and accent).
The note color seems to indicate accents and slides (the yellow and purple), but I'm still having trouble hearing which is which and it's not really doing a great job of getting to the level of resonance and distortion that happens with the real thing. It's nice that delay has been added as an effect on both "303"s and the overall mix, but there are so many classic acid tracks which relied on some sort of distortion either through external effects or various mods.
The whole issue of 303 emulators is a huge rabbit hole in and of itself. [1] The history of the 303 and its various uses can also go on for hours [2]
The "909" section only has 4 sounds with some (4?) different velocity (think loudness) levels. The real thing had 26 knobs to adjust the 10 different individual outputs (plus L/R) of 11ish sounds (ride and crash cymbals are on separate outs, but open/closed high hats are on one out). The "303" has 4 knobs but the real thing has 6 and the delay would be from some sort of external effects, so really it's missing 3 controls (tuning, env mod, and accent).
The note color seems to indicate accents and slides (the yellow and purple), but I'm still having trouble hearing which is which and it's not really doing a great job of getting to the level of resonance and distortion that happens with the real thing. It's nice that delay has been added as an effect on both "303"s and the overall mix, but there are so many classic acid tracks which relied on some sort of distortion either through external effects or various mods.
The whole issue of 303 emulators is a huge rabbit hole in and of itself. [1] The history of the 303 and its various uses can also go on for hours [2]
[1] https://djmag.com/longreads/8-best-tb-303-clones-according-a...
[2] http://blog.dubspot.com/roland-tb-303-spotlight/