HI,

This post is related to another post I saw about making a Pure Data tape loop
Here is the link:
https://forum.pdpatchrepo.info/topic/13234/tape-loop-effect

In that topic @whale-av posted a space_echo.pd patch that is constantly recording and can constantly play back, and you can control the speed of the playback too, it's a pretty cool patch.

Here is the patch

space_echo.pd

And you need ipoke~ for it to work

ipoke~.pd

My question is how can I modify this patch to only record when I want it to. And the array size would only be the same size as what I record. I still want to be able to change the playback speed, and I would like to be able to overdub onto the initial recording.

I do have a looper I made that uses a timer to see how long a loop is when recorded. The audio is written into a tabwrite~ and played from a tabread4~ . The time of the loop is put into a phasor~ and that is used for playback. The array size doesn't actually change, but the phasor~ only reads from the beginning of recording to how ever long the timer measured as the loop time.

I can upload my example if that helps.

But it looks like in this space_echo patch the audio is being written into ipoke and played from tabread4~. I can't find much info on ipoke~ in terms of writting to it. Does anyone have any advice on how to proceed with what i'm trying to do?

Thank You.

Nick

@nicnut See the "zoom test" here....... ipoke_v.3_test1.zip
You should be able to set the ipokezoombuff array sizes and their read points.

However....... this ...... which was rubbish and I have removed .... should work in principle but is untested for patching errors (see [pd control] added to original patch).
The start/stop used for the first run to set the tape length, and then overdubs applied as before.
If it doesn't work properly it is likely that my order of operations is incorrect,
David.

Hi @whale-av. Thank you for this patch.

I am having a few issues with it. I am getting an error "inlet: expected float but got bang"

I think the issues is In the pd control start/stop section. In that section I disconnected the [s phase_reset] from the 2nd outlet of the trigger and connected it to the first outlet of the trigger so it could get a float. I don't know if that stopped other things from working.

Also, in that same start/stop section I can't get the "control" array to change sizes when I press the start or stop button. Would it make sense to have a timer in that box and have the array use the time from the timer to resize the array?
Thank you for the patch!

@nicnut Yes, sorry.... no idea what I was thinking when I posted that patch...
A metro measure should give the array length something like this..... space_echo-mod2.pd
Probably still wrong though..... I need to find some headphones to test it while I am looking for my brain.
David.

space_echo-mod2.1.pd

Hi David @whale-av.

Thanks again for the patch. I still can't quite get it to work. Although it was recoding something and playing it back once. It seemed like it was always on and always recording, so I added a message from the start/stop box to the stop of ipoke~ and a play message at speed = 1. It didn't really seem to help much, although it does help to make the recording stop.

Let me know what else I should look at to get this to work.
Thank You!

@nicnut Still just theoretical.
I had added the speed message 1 already. For the recording to persist the feedback fader needs to be at maximum.... as it is a circular buffer and is lost unless fed back. Or less than maximum if you want the echo of the original recording to gradually fade away.
I have added messages to "start/stop" to mute input at the end of the first recording, and an overdub toggle to use when you want to add an overdub. That just opens the record signal and mutes it without affecting the feedback signal, and without changing the speed (in case you have changed it in the meantime).
space_echo-mod3.pd
[line] should stop any clicks.
David.

Hey @whale-av

I think maybe I don't need the ipoke~ constant recording part. I guess I'm more looking for a looper with variable speed playback and overdubbing.

I am going to start a new thread with the looper I have so far. I think it might be easier to modify mine to fit what I need. But this ipoke~ object is very cool.

nick