Symbols can be used in data structures. However, you can't just feed [append] (or even plain [set]) with symbols. The workaround is to use the pointer of the created data structure to edit its symbols with a [set] to which you give the -symbol argument.

Well, unfortunately, as the help says, "with a 512 sample delay, it begins to attenuate at about 110Hz". To keep decent low frequencies I have to use at least 2048 according to my quick test. No easy solution to the problem I guess.

Hello,

I can't find the source to it anymore, but to remove DC offset I use

[rzero~1]
|
[rpole~ 0.995]

which is practically perfect for my use, except it messes with waveforms due to inherent phase shift. Is there any way to cancel/revert this phase shift with, say, an allpass filter ? If so, how should I tune that?

The state saving system and dynamic gui modules are worth a look. I haven't delved in the rest yet.

Maybe should you have

[loadbang}
|
[float 6]
|
[until]

instead? Anyway, you can execute pd with the -noloadbang option to edit your patch.

@oid said:

Non-linear elements in the feedback path can be fun and do some interesting things but far from a general purpose filter, no clue if pd will play well with that sort of abuse.

In my humble experience: very well. I've been working on an "acoustic feedback" patch for a while now. With allpass/diffusion, peak filter and basic distortion in the loop, it was quite lively and convincing.

Thank you, it did work here too!

Hi,

Has anybody managed to get pd spectral toolkit working?
I'm especially interested in the GEM waterfall spectrum but alas, i get

pd-externals/SpectralToolkit/pd_spectral_toolkit.l_ia64: undefined symbol: _ZGVbN2v_exp
pd_spectral_toolkit: can't load library

on startup. make linux didn't complain about anything.

I love this feedback oscillator! I don't know how relevant it is, but it reminded me of https://ccrma.stanford.edu/software/snd/snd/fm.html [cascade FM: sin(sin(sin))]:

As z increases above 1.27, we get a square wave, then period doubling, and finally (ca. 1.97) chaos.

@chaosprint said:

For example, I would like to trigger a sound playback multiple times
it layers the playback at that particular rate

You mean, like a polyphonic sampler? If so I'd load the sample in a table and have an instance of tabread~/tabread4~ for each "layer".