| ??? 10/21/05 13:29 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#102724 - Duration of clippling gives velocity Responding to: ???'s previous message |
Robert said:
I can see that it would be easy to trigger a port with a piezo, but what I can't work out is how to make it velocity sensitive. I'm not quite sure, but I think it works as follows: Beating your piezo crystal results in a strong voltage peak. When giving this signal to an amplifier running at +5V and 0V, the output of this amplifier will clip. And: This clipping will last the longer, the higher the punch is. So, measuring the time duration of this clipping should provide you the velocity. Take care, that hitting a piezo crystal is not the same as hitting a standard drum set. With the latter you will always get a strong signal, even when hitting the drum set not optimally. But with a small piezo pad, the punch level will differ much more dratically. So, you might need some digital compression, which improves the level of unhappily hit pads. Means, levels under a certain threshold should be rised up to a minimum level. Kai |
| Topic | Author | Date |
| Midi drum pads | 01/01/70 00:00 | |
| Two separate issues | 01/01/70 00:00 | |
| Thanks Andy | 01/01/70 00:00 | |
| 01/01/70 00:00 | ||
| Thanks Jan | 01/01/70 00:00 | |
| Duration of clippling gives velocity | 01/01/70 00:00 | |
| Spot the Engineer... | 01/01/70 00:00 | |
| Semi technical | 01/01/70 00:00 | |
| Micro per pad | 01/01/70 00:00 | |
| Using the "time derivative" of signal | 01/01/70 00:00 | |
| That's how keyboards work! | 01/01/70 00:00 | |
| That's how keyboards work! | 01/01/70 00:00 | |
| one micro per string? | 01/01/70 00:00 | |
| Ahead of you :) | 01/01/70 00:00 | |
| We are... | 01/01/70 00:00 | |
| Here you go... | 01/01/70 00:00 | |
More than one oscillation | 01/01/70 00:00 | |
| one micro per string? | 01/01/70 00:00 | |
| That's kinda like how keyboards work! | 01/01/70 00:00 | |
| Perfect | 01/01/70 00:00 | |
| Micro Per Pad | 01/01/70 00:00 | |
| Excellent. | 01/01/70 00:00 | |
| WEOT: Drummers | 01/01/70 00:00 | |
| a lead ?? | 01/01/70 00:00 | |
| Excellent. | 01/01/70 00:00 |