Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

> > I was thinking of taking freeverb and removing the comb > filters and just using the allpass filters with 100% feedback thinking > it would make it a "cleaner" sustain. > I think that's worth a try. Using comb filters would be problematic in your case because the harmonics of the guitar

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Wow, thanks all for the replies! If I used a reverb would it end up giving the sustained voice too much character? I was thinking of taking freeverb and removing the comb filters and just using the allpass filters with 100% feedback thinking it would make it a "cleaner" sustain. I'm leaning this

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Simple OLA will produce warbles. I recommend a phase vocoder. ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Essentially, what you want is a "sustain" effect? ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Am 16.09.2016 um 19:30 schrieb Spencer Jackson: On Fri, Sep 16, 2016 at 11:24 AM, gm wrote: Did you consider a reverb or an FFT time stretch algorithm? I haven't looked into an FFT algorithm. I'll have to read up on that, but what do you mean with reverb? Would you

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Probably shouldn't reveal too much of the detail, but it likely comes as no surprise that the tradeoff between time and frequency resolution is critical in systems that have limited CPU horsepower. The FFTs in this case do run in the audio processing thread which is synchronous to the buffer

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Yup, I was asking because I found that on the M4 it is difficult to do proper overlap and add while keeping reasonably small block sizes for FFTs of useful length, so I was just curious whether you had to implement threads or just went for block sizes synchronous with the FFT step. If I

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

In the time domain I'd try to mask the whole sample e.g. with a triangle window. Then repeat it half overlapped. (Or was this already one of your "various forms of crossfading"?) Maybe even add up the signal with it's reverse signal to have constant power before overlapped playback. But that's

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Nice that it runs on the M4F, what FFT size, overlap and audio processing block size are you using? Are you running the FFT in a separate thread? Giulio From: Eric Brombaugh To: music-dsp@music.columbia.edu Sent: Friday, 16 September 2016, 19:12 Subject: Re:

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

On Fri, Sep 16, 2016 at 1:30 PM, Spencer Jackson wrote: > On Fri, Sep 16, 2016 at 11:24 AM, gm wrote: > > Did you consider a reverb or an FFT time stretch algorithm? > > > > I haven't looked into an FFT algorithm. I'll have to read up on that, > but

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

I coded up the spectral freeze core of the Audio Damage "Spectre" module in a similar way: http://www.audiodamage.com/hardware/product.php?pid=ADM15 It's a basic phase vocoder with forward and inverse FFTs but we added some fun little tweaks to shift, stretch and randomize the spectrum. It

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Hi,I actually implemented this a few years back using an FFT algorithm, I can dig out the code if you need it (it was a VST written using Juce and fftw, but there was no threading on the FFT if I remember correctly, so it is flawed as it is and it requires running with large blocksizes.I doubt

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Regarding reverbs, one classic element is the Schroeder allpass: https://ccrma.stanford.edu/~jos/pasp/Schroeder_Allpass_Sections.html You can use it to smear a signal without any constructive or destructive interference. Generally speaking this lack of "color" is a disadvantage, but for your

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Did you consider a reverb or an FFT time stretch algorithm? Am 16.09.2016 um 17:48 schrieb Spencer Jackson: Hi all: First post on the list. Quite some time ago I set out to create a lv2 plugin re-creation of the electroharmonix freeze guitar effect. The idea is that when you click the button

Re: [music-dsp] Help with "Sound Retainer"/Sostenuto Effect

On Fri, Sep 16, 2016 at 11:24 AM, gm wrote: > Did you consider a reverb or an FFT time stretch algorithm? > I haven't looked into an FFT algorithm. I'll have to read up on that, but what do you mean with reverb? Would you feed the loop into a reverb or apply some

[music-dsp] Help with "Sound Retainer"/Sostenuto Effect

Hi all: First post on the list. Quite some time ago I set out to create a lv2 plugin re-creation of the electroharmonix freeze guitar effect. The idea is that when you click the button it takes a short sample and loops it for a drone like effect, sort of a granular synthesis sustainer thing.

Re: [music-dsp] Bandlimited morphable waveform generation

Hello Andre, If you are interested in source code, here is a multi-wavetable implementation of a band-limited sawtooth oscillator. It windows the partials to avoid the Gibbs Effect. https://github.com/philburk/jsyn/blob/master/src/com/jsyn/unitgen/SawtoothOscillatorBL.java You can combine two

Re: [music-dsp] Bandlimited morphable waveform generation

> > > > From what I understand it is impossible to get rid of aliased frequencies > > after sampling. > > > > Once a frequency component is "aliased", it loses the original identity of > that frequency takes on the identity of the alias. Then it's just a > frequency component. The reason we