Hi all, new to pd, I think it might be useful for a project I'm building. I want to:

1. Load a VST plugin and set it to a preset
2. Feed the plugin a MIDI file and dump the audio output from the plugin to a .wav file
3. Do this for an arbitrary # of plugin presets and MIDI files (in the 1000's)

Note that I don't actually care about outputting the audio to speakers, I just want the .wav files. I want to know - is this possible using pd? I am aware recording to files is possible, but not sure about the MIDI file input, loading external VSTs, and programatic recording. Ideally I'd like to render it non-realtime to speed things up. If someone could point me to tutorials or similar projects that would be appreciated.

Thanks!

@vaidarnav

1. Yes.
2. Yes.
3. Yes.
   Note) Non realtime is possible in Pd with the command line switch -batch
   BUT you need a VST that will also create the synth sounds in such an environment and I haven't seen one.
   To load a VST (with preset control) in Pd....... https://forum.pdpatchrepo.info/topic/12500/vstplugin-0-3-0
   To write an audio file in the format you choose...... [writesf~]
   Choose a VST with midi file input to simplify the process, or install the MrPeach library to use [midifile]

There are many VST discussions on this forum, but the easiest way to find them is with a Google search "pdpatchrepo vst" as the search function for this site is iffy.
David.

@whale-av Got it thanks for the info, is -batch the command for non-realtime, I thought -nrt was? wondering what the real difference is.

On second thought, would a library like JUCE be able to accomplish the same? If possible I might end up using that

-batch means "run Pd as fast as possible". This is similar to NRT mode in SuperCollider.

-nrt means "run Pd without realtime priority". Usually, you would only use that for debugging (especially on Linux, to disable the watchdog). Otherwise, it has only downsides (e.g. higher risk of audio dropouts).

So -batch and -nrt are really not related.

Finally, Pd 0.51-1 now has a fast-forward message, which allows batch processing while in interactive mode.

It works similar to my [batchrecord] external.