Hey,
Do others have issues with audio playback when using soundfiler? I am using it in a fairly complicated patch to resize an audio file that I play 4x slower than the original file for a better version of granular synthesis. When I send the file to soundfiler to resize the audio file in a file that can be played using tabread4~ I get a glitch in the audio playback. This is after I start to add additional operations to my patch.

The patch is messy with lots of objects I have created. Mainly though, the audio playback is disrupted by sending a file to soundfiler to resize a location that has sound. I was thinking that I might be able to do this some other more elegant way. But am, slightly annoyed, that soundfiler seems to create issues.

Any thoughts?

@raynovich Loading a file into soundfiler takes time and so the table cannot be read correctly until it is written.
I don't really know what "granular" means for everyone, but made this Microsound-granular.pd a while ago, and it might help.
The file size stays the same and speed can be varied by a message to [phasor~] before [tabread4~].
It loads just one audio file and the arrays remain "whole"...... it is just the playback head that is moved and there is no "-resize" once it is loaded.
The playback head is moved all the time by a [metro] but before the move the sound is "ducked" by a message to [vline~] and then brought back up just after the move of the playback head to avoid clicks.

If you have lots of separate tracks loading with [soundfiler] you could join them together in one long track and access them by playback positions within the long track.
You will still have your problem though if you load a new audio file into the arrays and I don't know any way around that..... except that you could crossfade between old and new arrays once the new one has loaded..
David.

@whale-av Thanks for the response.

My issue is not related to the delay of loading the soundfile. Unfortunately, I think the issue is that when the file is loaded, the system delays and the sound is delayed. I am hoping that I can come up with another way to do this as the issue makes the audio too problematic.

Could it be the variable file size? I am using resize. Could that create a problem with the system saving the soundfile? What if I made the file larger than necessary and then there would be plenty of room?

I just tried to make the array larger. and then send a file of any size.

As I tried this with a large file, the interruption still exists. When I tried it with a small array no glitch occurs. I would really love to be able to keep the array at least 15 seconds large. I am using a 48000 sample rate.

The other way I could consider doing this is playing the original file at a slower speed.

I am thinking I need to look up how to do that effectively.

@raynovich You could try putting the audio into a table hidden in a sub-patch.
But I think the player will still have to wait for the table to be filled.
It might be marginally quicker as it does not draw the waveform to the screen.
David.

@raynovich we have no chance of knowing what is up or down in your patch without you sharing it. Soundfiler causing glitches upon loading is a well known "bug". It's not actually a bug. It's akin to [bang]->[until $1] where $1 is the number of samples in the file you are loading. PD wont do anything else until it has processed the entire file. You can make up for this by calculating how long your patch will be "offline" (something something buffer size / samplerate +/- cpu mubo jumbo) or have all samples loaded at startup in one huge file as @whale-av suggested.

@raynovich Here's an alternative to soundfiler that spreads the file loading over several audio ticks. I don't think you can resize the array without there being hiccups though. soundfiler alternative.pd

Edit: better to use [metro 1.45125] to keep it block-aligned

@whale-av Right. Drawing the table might be a problem.

@bocanegra I have run up against the showing of the patch. I guess I really need to figure out how to do that effectively. I am using lots of two libraries I have created and do not know how to send the patch for others to be able to upload it.

@jameslo Thank you. I will look at that patch.