Re: [music-dsp] What is resonance?

2018-07-22 Thread Stefan Sullivan
Oh interest challenge of the definition of resonance. The typical textbook diagram shows a little local bump at some frequency in a bode diagram, but if you consider dc the resonant frequency, then the only way to show a bump is by being higher than all the other frequencies (i.e. monotonically

Re: [music-dsp] resampling

2018-07-22 Thread Sound of L.A. Music and Audio
This code is also dangerous "LGPL" :-) Seriously, I'm afraid this is also too much for him. Code is not really good to explain solutions. I prefer the clarification and let people code themselves. Let's try it this way: 1. Apply an anti aliasing filter with an edge frequency of about

Re: [music-dsp] What is resonance?

2018-07-22 Thread Sound of L.A. Music and Audio
A HHR performes both simple reflection and self oscillation. At the beginning of the triggering phase the sound runs into it and is reflected at the inner walls. A little part of the sound comes out through the hole while a larger part is reflected creating steady waves as known in all rooms

Re: [music-dsp] What is resonance?

2018-07-22 Thread charles morrow
How about freezing and stretching moments. Is this resonance? > On Jul 22, 2018, at 21:10, robert bristow-johnson > wrote: > > > I've been wondering about the connection that resonance and filter orders at > least 2. That's 2 delays (and feedback). > > But if you're limiting the resonant

Re: [music-dsp] What is resonance?

2018-07-22 Thread robert bristow-johnson
I've been wondering about the connection that resonance and filter orders at least 2.  That's 2 delays (and feedback). But if you're limiting the resonant frequencies to DC and Nyquist, then with a one-sample delay digital filter, you can have something like "resonance".  Even if the

Re: [music-dsp] resampling

2018-07-22 Thread Henrik G. Sundt
This solution, without using any low pass filters before and after the desimation, will generate a lot of aliasing frequencies, Kjetil! Here is another solution: https://github.com/intervigilium/libresample/tree/master/jni/resample Henrik On 22.07.2018 22:22, Kjetil Matheussen wrote: Maybe

Re: [music-dsp] What is resonance?

2018-07-22 Thread Stefan Sullivan
Yes. The term helmholz resonator should be a hint ;) Basically when a sounds gets added to itself after a delay you end up adding energy to the frequency that corresponds to that delay amount. For very long echos we don't hear it as a resonance, but for shorter delays it will boost higher and

Re: [music-dsp] resampling

2018-07-22 Thread Alex Dashevski
where is low pass filter? On Sun, Jul 22, 2018, 23:22 Kjetil Matheussen wrote: > Maybe this will give you an idea: > > 48khz -> 8khz: > float get_output_sample(get_input_sample){ >static int i=0; >static float sample; > > if (i % 6 == 0) > sample = get_input_sample(); > > i++;

Re: [music-dsp] resampling

2018-07-22 Thread Kjetil Matheussen
Maybe this will give you an idea: 48khz -> 8khz: float get_output_sample(get_input_sample){ static int i=0; static float sample; if (i % 6 == 0) sample = get_input_sample(); i++; return sample; } 8khz -> 48khz: float get_output_sample(get_input_sample){ float ret =

[music-dsp] Creating new sound synthesis equipment

2018-07-22 Thread Theo Verelst
Hi DSPers, I would like to reflect a bit about creating (primarily music) synthesis machines, or possibly software, as sort of talking about a dream that has been of some people since let's say the first (mainly analog!) Moogs in the 60s. What is that idea of creating a nice piece of

Re: [music-dsp] resampling

2018-07-22 Thread Alex Dashevski
real time On Sun, Jul 22, 2018, 22:52 jpff wrote: > Were you expecting real-time/time-critical resampling or offline? > > ___ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp

Re: [music-dsp] resampling

2018-07-22 Thread jpff
Were you expecting real-time/time-critical resampling or offline? ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp

Re: [music-dsp] resampling

2018-07-22 Thread Alex Dashevski
This is even more incomprehensible. I'm looking for a simple example of code and explanation how to convert signal of 48Khz freq samples to 8Kh ,do processing of signal and convert 8Khz to 48Khz freq samples. Thanks, Alex 2018-07-22 22:28 GMT+03:00 Vladimir Pantelic : >

Re: [music-dsp] resampling

2018-07-22 Thread Vladimir Pantelic
https://en.wikipedia.org/wiki/GNU_Lesser_General_Public_License On Sun, Jul 22, 2018, 21:23 Alex Dashevski wrote: > Hi, > Could you explain how to use with LGPL ? I can't understand it. > Thanks, > Alex > > 2018-07-19 21:28 GMT+03:00 Esteban Maestre : > >> Hi Alex, >> >> >> This is a good read:

Re: [music-dsp] What is resonance?

2018-07-22 Thread rolfsassinger
Hello all   Is "feedback with delay" really resonance? I recognize many people describe the effects of "room resonanes this way", but to my understanding these are no resonances in the basic meaning but reflections. A resonance is a self standing oscillating system like a guitar string or an