hello, first question here.
since grain playback of flucoma concat example patches is monophonic I was thinking about a way to get grain overlap when moving mouse in the plot. can someone here explain how it works in framelib.
does fl automatically overlap frames when you send ramps longer than the impulse interval to fl.read~ or do I need to specify it somehow?
thanks. johannes
Hi @johannes. I’m not sure exactly what you mean by monophonic here (as I don’t know which FluCoMa examples you are referring to) but perhaps the following will help:
[fl.sink~] is an overlap-add buffer, so grains arriving at [fl.sink~] can be longer than the interval between consecutive grains and you will still hear each of them in their entirety. When you are in framelib-land the notion of “overlap” doesn’t necessary have a clear meaning. Each frame happens at a given time (which is sub-sample accurate) and can have any length (in samples) at each point in the network. A frame may not represent time-domain audio, so it’s unclear whether frames “overlap”. However, at the inputs and outputs to a network the question does make sense and as mentioned before [fl.sink~] will overlap-add anything arriving at its input. Thus, there are no “voices” in a strict sense in a simple framelib granular network, but you can have many simultaneous grains.
Hopefully the framelib tutorials/examples would make things clear also, but do ask further if you need more explanation/help.
Thanks Alex,
I was refering to @james.bradbury s great video tutorial series. Here every new triggered grain will stop the playback of the preceding grain so we can only play one grain at a time.
Nice, What you wrote about the fl.sink~ sounds what i need plus fl.audiotrigger~ (i guess) ö to trigger my network once for each new selected grain and extract the current grain sampleoffset/start and grainlength to adjust fl.+~ and fl.ramp~ accordingly.
Btw. How would we change the pitch or transposition of the grain in fl-land? Didnt found an example that shows it…
If you multiply the ramp by some constant you can play back at a different pitch.
Here’s an example.
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-----------end_max5_patcher-----------
great! thanks for pointing out @a.harker.
in the meantime I took a closer look at @james.bradbury s corpus patch and expand on it a bit.
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now it does the ola part and I also add a loop mode, just to see how it could be done in FLib… not that efficient.
I noticed (at least ) 3 things that I had problems to get my head around:
some grains won’t be played in ola mode, while they will be played in @james.bradbury´s non-ola playback version. from what I saw it seems that longer grains (> ca. 6500 ms length) will be ignored. there might be a limitation of how long grains fl.sink~can handle or something similar?
in my loop mode I use fl.interval~ as a trigger source. now when I move the cursor in the corpus plotter and jump from a longer to a shorter grain it takes a while until it triggers the new(shorter) grain. I guess that when fl.interval~ receives a new interval message it will complete the current frame before switching the interval… is there a workaround for this? I would like to play the new grain in loop mode immediately… while the last grain continue to play til its end point. so I tried to combine the audiotrigger~ (for instant triggering) and fl.interval~ by patching them to same input but this is not possible and wouldn’t probably make any sense…
also I wonder how you would treat the grain windowing when grain size changes all over the place (from 50 ms to 9000 ms let say)… I went with trapezoid for now because I need a steep attack to not lose the transients.…
FrameLib makes more sense now…
hope to digg deeper the next days. appreciate your work and help Alex.
Check the /buffer_size
parameter
What you have done will be adaptive to the grain size already. I’m not sure what you mean You can always get rid of the window too though it’s likely with the flucoma slicers you’ll get some suboptimal results on that front.
Yes, but you can change the limit with the /buffer_size parameter - the default is 250,000 samples (around 5.6 secs at 44.1k). Grains that are too long are ignored.
Yes the interval has to complete in order to update to a new interval - I think that is different if the fl.interval~ is in switchable mode and you switch it off and on again.
A trapezoid makes sense for sharp transients - you may also wish to alter the shape to make the up and down the same temporal length as the grain size changes.
thanks guys, this solved the issues. that I had…
loop mode works pretty solid now…
@a.harker for the fl.interval~ updating, did you had something like this in mind?
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yes, as you suggest I need constant up and down times.
will fl.window~ Tukey do that or will it automatically scale the up n downs times when changing grain size?
All window times are relative to the window, so if you need them to be constant you’ll have to do a little bit of maths - probably using the output of fl.length~ to set the up or down time before you apply the window. Or you can use fl.ramp~ and create your own window function from the output which you can apply with fl.*~.
In terms of the patch - this correctly restarts the interval when the time changes so it looks good to me.