Driving 4 leds regarding loop length

[Djeremaille]

Hello!

Firstly, I'm french and my english is very bad. At the moment I don't know how I will explain my problem...

Thanks to @rbrt I added a looper to my patches. It can record loops from my Korg minilogue.

I have a Groovesizer Multiboard sequencer to trig the groovebox part of my patches.

I modified the looper so when I hit the record midi/cc button, it's waiting for a note to start or stop record. This note is placed at the start of a 32 steps track on the Groovesizer. My loop is perfectly synced!

My problem is when my loop is too long (128 steps) and repetitive I don't know where is the start. Adding overdubbed layers is a little bit tricky. It's ok as long as I don't stop the loop but if I stop and restart it, the result can be bad.

So, basically I want to drive four leds, one every quarter of the loop, to help me to know where i am.

I thought about a square lfo but I don't know how to convert the loop length into k-rate fractional to drive the lfo.

Maybe there is a better way to do that so tell me please

I hope you understood me.

[Blindsmyth]

So, basically I want to drive four leds, one every quarter of the loop, to help me to know where i am.

So you want the loop to be divided into 4 parts and one light for each section? eg: loop is 128 steps long,
1. light step 1,
2. at 33,
3. at 65,
4. at 97?

If this is the case it might be worth having a look at my looper in this thread:

Quantising Table Playback To Clock

I know this topic has poped up a couple of times here but I couldn't find an answer here and Ihave a specific aproach that I need help with: I want to quantise the playback of a table to a clock, a master tempo. More concrete I want to Loop Audio and have the Loops playback in Sync with the master Tempo. To start with that I don't need to incorporate the possibility of tempo changes. My aproach is to first of all quantize the Record/Play button presses of the Looper Patch. Furthermore I count…

With this loop I have a dynamic counter, that counts how long the loop is. You could probably somehow modify this to divide the loop lenght by 4 and drive your leds.

[Djeremaille]

Thanks!

I already tested your patch but I didn't understood... I will retry!

[Djeremaille]

Yes! I've done it in a more simple way.

When position is greater than 1: the 1st led is on ( the green one)
The second when it's greater than the quarter of the length etc ....

So easy

Thanks a lot!

[Blindsmyth]

Cool that looks really smart and simple!
I think I will also integrate the record sync mechanism of your looper into my patches as it looks a lot simpler than what I am doing so thank you too!

[Djeremaille]

You're welcome!

Now I'm searching a way to drive the leds with a 74HC595. I have seen some examples but they are not controlled in the same way than me.

If you have an idea...

[Blindsmyth]

Oh no Idea about that sorry. For simplicity my plan is to rely on midi controllers with LEDs at the moment
My day goal is to solder jacks on the board for connecting footswitches to control the loops but that shouldn't be to difficult.
This thread gives good information about that stuff:

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[Djeremaille]

I found a way to drive the 74HC595!

It's working very good!

Here is how it looks like: