Re: Convolve and TimeStretch Quarks

Just curious what you mean by sample accurate convolution?

On Fri., Feb. 19, 2021, 4:47 a.m. , <[email protected]> wrote:

> Thanks Wouter. Uff. The old “changed how it worked and didn’t test it with
> a different duration” trick.
>
> It should be fixed now. Tested on many different durMults.
>
> Eli, thanks for that. I updated the help and actually gave TimeStretch2 a
> little tweak to place it in line with how TimeStretch functions. The
> silence and cut make sense. TS2 uses the server side fft, so in order to
> line up all the frames correctly, there has to be at least 65536 frames of
> silence at the beginning. The end of the track is a little trickier, and
> not perfect, but TimeStretch is really the way to go in all cases. I’ve
> spent a lot of time trying to get TS2 to sound like TS, but to no avail.
>
> This is also true with the Convolve quark. The sample accurate convolution
> is a revelation. It is so clear and detailed compared to using something
> like ReaVerb with the same samples. It makes me want to only do NRT
> convolution reverbs in my mixes from now on…though I probably won’t.
>
> Sam
>
> On Feb 18, 2021, at 5:56 PM, [email protected] wrote:
>
> Sam, testing these out. Cool stuff, thanks for adding these quarks.
>
> I noticed that all the examples in the TimeStretch2 help file involve the
> use of TimeStretch (rather than TimeStretch2), which looks like a mistake.
> TimeStretch.stretch(...) produces a "method not understood" error.
>
> Otherwise, all seems to be working for me. Still tinkering with settings
> to hear the different results. TimeStretch2.stretch(...) produces a file
> that has a chunk of silence at the beginning (~3 sec), and the audio is a
> bit cut off at the end of the file. This might be from something I'm doing
> on my end, though.
>
> Nice work!
> Eli
>
>
> _________________________
> Eli Fieldsteel, DMA (he/him/his)
> Director, University of Illinois Experimental Music Studios
> Assistant Professor of Composition-Theory
> Office: 217-300-0956
> MB 4008, School of Music
> 1114 W Nevada Street
> Urbana, IL 61801
>
>
> On Thu, Feb 18, 2021 at 8:53 AM <flo.huth-HaK8Zq/[email protected]> wrote:
>
>> thank you!
>> On 17.02.21 15:34, [email protected] wrote:
>>
>> Ah. I thought I could prevent download without preventing playback. I
>> thought wrong. It is fixed now.
>>
>> Sam
>>
>> On Feb 17, 2021, at 3:05 PM, flo.huth-HaK8Zq/[email protected] wrote:
>>
>> hi,
>>
>> im restricted by your google drive and cant download the file.
>>
>> thx!
>> On 17.02.21 14:17, [email protected] wrote:
>>
>> Hey all,
>>
>> I’ve added one quark of late and updated a second:
>>
>> *Major Update: TimeStretch*
>>
>> Super PaulStretch algorithm which separates the signal into 9 discrete
>> "octaves", which are processed independently
>> Now runs completely in sclang, so it is very slow, but also sample
>> accurate
>> On MacOS each channel can be processed in its own terminal window
>> Uses correlation analysis and custom windowing between frames to achieve
>> a smooth stretch
>> Can time stretch resonant and transient elements with different settings,
>> significantly improving the clarity of a stretch
>> Now works with files of any SampleRate
>> Python version by Alex Ness and Jem Altieri
>>
>> Here is a little taste test with the Star Trek TNG theme song:
>>
>> https://tinyurl.com/55ocdnm9
>>
>> *New Quark: Convolve*
>>
>> Some times you just want to convolve two sound files (and I have wanted
>> to be able to do this in SC since I stopped using CSound in 2002). Uses the
>> convolve method of the SignalBox Quark to convolve two files of any size.
>> Runs completely in the language.
>>
>> Let me know of any issues, and I hope these can help you make some
>> covidtastic space jams.
>>
>> Sam
>>
>>
>>
>>
>