First thing, is it getting power? Try it in a USB 2.0 port if you have one, USB 3.0 ports sometimes play up. Try a different USB cable. If you're connecting through a USB hub then try it direct instead. The general fix for "device descriptor failed" is to right click on that (in Device Manager), sel...
If you can get the Casio USB MIDI driver to load successfully on whatever computer system you're using it should be o.k. But it's a very old keyboard so I don't know how well it will work with newer operating systems than Windows XP that it was designed with.

Steve
For melodies I think the timing and the intervals between notes are far more important than the key. So I start almost everything off in C (all the white notes). and then when the timing and shape of the melody are about right I'll move it up or down to where I want it. But that may just be me and I...
I didn't really understand the tutorial. It's an interesting tutorial but I wonder if it's not for what you want. What drummers call a "ghost note" is very different. That's a quiet note, usually on the snare, placed in between the normal accented notes. They are very easy to make just by writing t...
In LMMS you have an Instrument menu containing instruments and a Samples menu which contains samples. What you were describing was samples played using the Audio File Processor instrument. And in that instrument the base note just means "Play the sample exactly as is" while the other note positions ...
With INSTRUMENTS like Triple Osc the base note will be an A. It may be an octave or two away from 440Hz (like 110Hz) but it will be an A. I'm guessing that the other things you describe are SAMPLES not instruments. And for a sample the base note in AFP will play whatever note the sample was original...
I just got LMMS today and I want to use the melody played upon previewing a sample (specifically the Arpeggio.xpf sample), but I don't know what notes are played and Google isn't being helpful. Can someone help me? That's not a sample, it's a preset for Triple Oscillator and the "melody" for that o...
In the video the thing on the far left is a hi-hat...it's characteristic is that it has a foot pedal to open and close the two parts. The others being hit are cymbals, ride or crash, it's not easy to tell visually. See e.g. https://www.normans.co.uk/blog/2014/04/anatomy-drum-kit/ Don't let brandy co...
Piano roll always loops in complete bars/measures. If your tune doesn't fill the measure there will always be a gap before it loops round.

Steve
Channel 10 is the General MIDI default channel for drums. That's why many pad controllers default to that channel. I've never had any problem mapping different MIDI channels to different instruments. In case my memory was faulty I just tried it with my M-Audio keyboard...keys on Ch1 driving Triple O...