Timeline for Phase response in a filter for an Audio Application
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 21, 2019 at 6:49 | comment | added | robert bristow-johnson | of course, in blending the processed sound with the original sound, delay and phase (of just the processed sound) will affect the audible sound of the blended result. that's how phase shifters and flangers work. but that is not the illustration i had meant to show above with the simple cascade of processes. | |
| Nov 20, 2019 at 9:46 | comment | added | Marcus Müller | The magnitude doesn't inherently suffer – you might (usually: will) have to design a higher-latency / longer / more resource-intense filter if you want the same steepness or flatness of filtering, though. If your system has no feedback, then it's often a system where processing latency doesn't matter, and then your statement isn't true: you can at least approximate that nonlinear-phase filter's magnitude response with a (potentially) longer linear-phase filter. | |
| Nov 20, 2019 at 6:28 | comment | added | Luke Galea | With regards to aiming for a linear phase, the magnitude response is going to suffer then usually. Isn't that undesirable in audio ? | |
| Nov 20, 2019 at 6:27 | comment | added | Luke Galea | You are right, it does depend a lot on the application at hand which I did not specify. My main interest is musical/sound effects and so my main concern was perhaps - is that group delay heard? Well when the output is straight from the filter a micro second delay might not be an issue (not sure). However how about blending the filter output and original signal? That might result in some non-ideal behaviour since the frequencies aren't summed at the same point in time. And so if none of the processes use feedback, one should aim for a linear phase right? | |
| Nov 20, 2019 at 6:20 | comment | added | Luke Galea | Thank you both for your comments! Much appreciated. | |
| Nov 20, 2019 at 0:25 | history | edited | robert bristow-johnson | CC BY-SA 4.0 |
added 14 characters in body
|
| Nov 20, 2019 at 0:04 | history | edited | robert bristow-johnson | CC BY-SA 4.0 |
added 128 characters in body
|
| Nov 19, 2019 at 23:13 | history | answered | robert bristow-johnson | CC BY-SA 4.0 |