Timeline for How are multiple frequencies played through a speaker/buzzer without distorting eachother?
Current License: CC BY-SA 3.0
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| Aug 24, 2017 at 10:08 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jul 25, 2017 at 15:11 | comment | added | JimmyB | As others hinted more or less clearly, you will need to feed an analog signal to the buzzer. The analog signal then is just the sum of its components or sounds or waveforms. As you figured out, summing 1-bit digital input signals into a 1-bit digital output signal does not work. | |
| Jul 24, 2017 at 22:35 | answer | added | rackandboneman | timeline score: 1 | |
| Jul 24, 2017 at 20:34 | answer | added | old_timer | timeline score: 0 | |
| Jul 24, 2017 at 18:53 | answer | added | Olin Lathrop | timeline score: 1 | |
| Jul 24, 2017 at 18:30 | comment | added | Chris Stratton | Your goal can be achieved, but you're going about it in completely the wrong way. Don't use 555's - they generate square waves and will be very hard to control. Instead, get a reasonably fast MCU with a DAC or fast PWM you can filter, and do software synthesis of a sum of multiple sine waves. If you want to stay Arduino-ish, a high end Teensy or possibly a Due or even an ESP8266 might be choices. | |
| Jul 24, 2017 at 16:33 | comment | added | Eugene Sh. | @Trevor Yes, I see your point. If we have two "instruments" working in opposite phase, we can get different sounds by putting them apart and moving the observer. But if playing from a single spot we won't hear anything. I guess that is what the sound engineers are for :) | |
| Jul 24, 2017 at 16:31 | comment | added | Trevor_G | @EugeneSh. yup but it does raise the interesting question, can that single source super-position effect be classed as a distortion. I guess that's one of the reasons stereo sounds so much better than mono. | |
| Jul 24, 2017 at 16:29 | comment | added | Eugene Sh. | @Trevor Right. Unless you have a special spot where whey in the anti phase :) Anyway, when we are talking about different frequencies, this effect has a different form (have you ever tuned a guitar? :) ) | |
| Jul 24, 2017 at 16:28 | comment | added | Trevor_G | @EugeneSh. Yup that's true, but a drum and a guitar have special separation. Two sine waves out of phase only cancel out because they have a single-point source (the speaker). If you and I played the same note on some instrument that produced exactly a sine wave, it would not be the same. Which is the part that makes it interesting. | |
| Jul 24, 2017 at 16:25 | comment | added | Eugene Sh. | @Trevor I would say that a superposition of waves is not a distortion, but the way things are working naturally. If you have a drum an guitar, their "waves" are just adding together in your ear. and the combined sound is not a "distortion". | |
| Jul 24, 2017 at 16:22 | comment | added | Trevor_G | @EugeneSh. that is an interesting question... | |
| Jul 24, 2017 at 16:18 | comment | added | Eugene Sh. | If you play two sine waves with opposite phase, they will cancel out. Does it count as "distortion"? | |
| Jul 24, 2017 at 16:16 | comment | added | JIm Dearden | Superposition, see also Fourier synthesis | |
| Jul 24, 2017 at 16:15 | review | First posts | |||
| Jul 24, 2017 at 19:36 | |||||
| Jul 24, 2017 at 16:14 | history | asked | Cal Hensley | CC BY-SA 3.0 |