Re: [music-dsp] Delays: sampling rate modulation vs. buffer size modulation

2016-03-25 Thread Theo Verelst
Matthias Puech wrote: Hello, ... I am trying to understand what is the observable relationship between these two scenarios when modulated ... The main thing to remember when thinking of the maybe easier to get example of a tape delay is that the the difference in tape speed at the moment of

Re: [music-dsp] Delays: sampling rate modulation vs. buffer size, modulation

2016-03-24 Thread andy butler
On 23/03/2016 16:01, music-dsp-requ...@music.columbia.edu wrote: 1/ the classic digital delay, where read/writes are made at a constant sample rate, but where the size of the buffer can be modulated, 2/ the BBD-like delay, where the size of the buffer is constant but the sample rate can be modu

Re: [music-dsp] Delays: sampling rate modulation vs. buffer size modulation

2016-03-24 Thread Matthias Puech
Hi, Thank you very much for your answers Vadim and Evan. Vadim, indeed, this integral bounded by the delay time is the answer I was looking for. I am still wrapping my head around it, but it's tasty brain food, thank you. Evan, you are right in that it's much easier to get the intuition thinking a

Re: [music-dsp] Delays: sampling rate modulation vs. buffer size modulation

2016-03-23 Thread Evan Balster
Matthias -- Resampling (sample rate change) and delay are distinct but related operations -- I think it is helpful to consider them separately when considering any variable-delay implementation. First, imagine a black box containing a large amount of magnetic tape which can be drawn out through a

Re: [music-dsp] Delays: sampling rate modulation vs. buffer size modulation

2016-03-23 Thread Vadim Zavalishin
On 23-Mar-16 00:45, Matthias Puech wrote: Does this mean for instance that if I provide a control over the integral of D in 1/ I will get the exact same effect as in 2/? I have been thinking about this question a while ago (in terms of tape rather than BBD delay, but that's more or less the sa

[music-dsp] Delays: sampling rate modulation vs. buffer size modulation

2016-03-22 Thread Matthias Puech
Hello, I have a practical problem and a theoretical question to submit to the readers of this great list. First, the problem: In a recent discussion [1], I (partially) realized the subtle differences between two implementations of a delay line with modulation over the delay time: 1/ the classic d