Hello all,
New project I am working on which I would like to consider using additive synthesis. I do not want to overburden the CPU and will record the piece in stages.

Ok with that in mind, you can manually or automatically record an osc~ sine wave into an audio file in real time or even multiple oscillators at the same time.

But if you are to do that, then it would take the same amount of real time to record each portion of the piece and then put all of the pieces together. If the patches got really complex this could take days of computing time.

To be simple in showing this:

|osc~440|
|
|
|writesf~|

If I created a file name test.aif, and banged start as message to this, with a delay of 30 seconds to a stop.

A file named test.aif with a sine wave at 440 hertz for 30 seconds would be created, but it would take 30 seconds to create. Is there a faster method? If not, there should be. No?

No help? Was my question clear enough?

This is tricky and not something I normally work with.

The second time I read your post, I thought about this. It's hopelessly impractical and maybe not faster than another method. The frequencies possible are divisions of table length.

And this builds a table, you would need to write the table to an audio file, at which point you could use {until } to generate more sophisticated tables. Is there an object that allows one to write table contents to an audio file? If not, you might be able to use another program to crawl the contents of a table in a saved patch and convert to samples.

Yeah, I was thinking that this might not be possible or practical in Pd.

Wait, Maybe look into vanilla object {soundfiler }

Looks like it can write .aif and it might be quick enough. I don't have experience with it.

Instead of generating audio, you would feed counters with {until } that would scan sine functions and write to a large table.

Does Camomile have this kind of functionality? I haven't played around with it yet but I've been thinking about getting some of my patches working in it to integrate into Reaper. I assume that if you render a project in a DAW with camomile that it can calculate the output in non realtime. Otherwise it would be quite limited. But again, I haven't tried this yet; I'm just hoping to in the near future.

If your worried about cpu usage look at the switch~ object's help file. it's a lot of work but you can create an extremely cpu intensive patch and record it in blocks. also sinesum can be very fast if you create a numbered loop with until (until 300) and simply prepend it with nameofarray sinesum samplesize... however this is making a wavetable so you lose all the dynamics of the partials. also when i first read your post I assumed you would be recording each partial one at a time than mixing them together, which could actually be interesting.

As LarsXI suggested, you can use a sinesum message to fill an array with the waveform you want.
You can save it to an AIFF by sending a message to a soundfiler object starting "write -aiff" followed by the path and the filename. Check the help file for soundfiler for the exact syntax.