I have just posted my DR-550 sample set. Owned this drum machine in the early 90s. It was a bargain at the time! This one is a free download!
If you're looking for a simple, no-frills drum machine with a distinct '90s vibe, this little box might be right up your alley.
This is where the DR-550 really shines for many. It's got those classic 16-bit sampled drum sounds that feel very much of its era (late '80s/early '90s). Think clean, punchy, and a little bit sterile in a good way. Many say the sounds are pulled from the higher-end Roland R8/R5, which is a huge plus. You get a decent range of kicks, snares, hats, and some useful percussion, and you can tweak the "tone color" and decay a bit to get some variation. It's surprisingly versatile for different genres, from pop and rock to even some early techno or industrial. It's small, light, and can run on batteries, making it great for tossing in a bag and jamming anywhere. If you just want to punch in a simple beat, it's pretty straightforward. The step sequencer is generally well-regarded for its simplicity. Since it's an older model, you can usually snag one for a pretty good price on the used market. Great value for the sounds you get. Many old units are still kicking around, which speaks to their build quality.
This is probably its biggest drawback. While you can adjust "tone color" and decay, you can't really get in there and sculpt sounds extensively. No individual outputs for each drum sound either, so you're stuck with the stereo mix. The pads aren't velocity-sensitive, meaning every hit is at the same volume. You can use the accent function to add some dynamics, but it's not the same as real velocity control. It only has MIDI In, which means it can receive clock and note data, but it can't send it out to control other gear. This can be a pain if you want it to be the master clock in your setup. Saving your patterns and songs often involved a cassette interface back in the day, which is obviously a bit archaic now. No easy modern backup solution unless you sample the sounds out. Compared to modern drum machines, the workflow can feel a bit dated and less intuitive for complex programming. Some users also report "sticky pad syndrome" on older units.
The Boss DR-550 is a cool, nostalgic piece of gear. If you appreciate those vintage digital drum sounds and want a simple, portable beatbox for quick ideas, practice, or adding that specific '90s flavor to your tracks, it's a solid choice, especially for the price. Just don't expect a modern, fully-featured production powerhouse. Think of it more as a fun, lo-fi groove box with character.
Here is a link to get the sample set.
https://horrorblade.gumroad.com/l/khqccs