#23

Youā€™ll probably be done before lunchtime, really not much to itā€¦

1 Like
#24

Iā€™m still beavering away at this - having fun! Iā€™ve upgraded to using the Teensy 3.6, which has more processing power, and a whopping 256k or ram, which gives me around 3 seconds of audio at 12-bit. Iā€™m using the PCB board I designed for my AudioFreeze project which was designed for Teensy 3.2. The 3.6 is twice the length, but by crafting a tower block of female header (well 2), I was able to raise the Teensy over the height of the ribbon power connector!

IMG_0919.JPG2448Ɨ2448 1.08 MB

With all the extra processing power the 3.6 provides I was able to create 3 separate play heads, all looping audio at different pitches which is mixed together. One plays at 1/2 speed (1 octave down), one at normal speed, and one at double speed (1 octave up). Currently the mix ratios of these are fixed as Iā€™ve run out of knobs on my board!

Hereā€™s a very simple demo, you can hear the acoustic sound of the guitar in this video, normally Iā€™d want the effect to be totally wet, but it does serve to show you what the original audio is doingā€¦

I think Iā€™m definitely getting closer to @dspk 's video that I originally cited. Next step is to add more pots to control all the parameters, and potentially add CV control for them all. Iā€™d like to move away from using the audio shield, as Iā€™m not really taking advantage of the 16-bit DACs/ADCs. Iā€™m really only using it so I can use the Teensy ADC to read the pots. Iā€™m planning on designing a new PCB and using a PIC chip to handle all of the pots and CV interface stuff and then connect that to the Teensy via I2C, but Iā€™ve no experience of that, so thatā€™s a whole new adventure!

8 Likes
#25

really neat stuff! it reminds me of some of the montreal assembly pedals, which i only recently discovered. your end result is a lovely collision of notes.

3 Likes
#26

Cheers! Havenā€™t really learnt to ā€˜playā€™ it yet, as Iā€™ve literally only just finished the code, hence only playing 3 notes! Will check out that pedal companyā€¦

#27

Yeah I was thinking it reminded me of mode 3 on the count to five pedal. (My favorite)

3 Likes
#28

Hereā€™s a more up to date video of where I am with it. Still a few issues to iron out (like the background noise), but Iā€™m pretty pleased with it so far.

Iā€™ve written a blog post with a bit more info http://www.cutlasses.co.uk/tech/glitch-delay/

9 Likes
#31

i2c!!! :heart_eyes: plus 20 char

1 Like
#32

This is super cool and very inspiring ā€“ I make a lot of software stuff, but Iā€™ve been wanting to get into using the Teensy more. Really exciting!

Iā€™m particularly looking forward to how you use a pic over I2C to communicate with the Teensy ā€“ Iā€™ve heard a lot of people using that method for other DIY projects and Iā€™m super curious about it. Thanks for being willing to share!

1 Like
#33

Thanks! Itā€™s nice to know Iā€™ve inspired people, as Iā€™m always inspired by so much on this forum.

There is already a PIC chip on this module, that handles the interface side, and reads the pots. Iā€™m hoping this should make implementing the expander module reasonable straightforward. Iā€™ll try to write some more about the tech side of how it works soonā€¦

1 Like
#34

This is a very inspiring project for me too.
Just came here to say this, and that I like the music I just listened to via your website. The first two tracks were great! (Iā€™m looking forward to listen to the other tracks when I have the time). I apologize for being off-topic though.

1 Like
#35

Really nice sounding! Iā€™m tempted to try to make something along these lines on Er-301. I used to perform guitar improv using something similar I built in PD many years ago, but had kind of forgotten about it.

Great work!

2 Likes
#36

Oh great, glad you like the music too. One of the side motivators to doing videos like these is to get a bit more exposure, and to draw people to my site and my music. Glad it worked!

For any others interested :wink:
www.cutlasses.co.uk

4 Likes
#37

Iā€™m particularly looking forward to how you use a pic over I2C to communicate with the Teensy ā€“ Iā€™ve heard a lot of people using that method for other DIY projects and Iā€™m super curious about it.

FYI this is really easy to do on Teensy. You just use the Arduino Wire interface, hereā€™s the bit in the code that does it (from https://github.com/cutlasses/GlitchDelayV2/blob/master/GlitchDelayInterface.ino)

  // start I2C with PIC chip
  Wire.requestFrom(I2C_ADDRESS, I2C_DATA_SIZE_IN_BYTES);

Happy to help if you have any questions about getting started with Teensy. They have a very helpful forum too.

1 Like
#38

Super nice !
I guess there is a lot to learn from your code, thanks for sharing !

1 Like
#39

Noticed I hadnā€™t actually put the schematics up on GitHub, they are there now https://github.com/cutlasses/GlitchDelayV2/tree/master/build

#40

Thanks for sharing this, it sounds lovely! :slight_smile:

I just started working on something similar (inspired by the count-to-five previously mentionned) as a first project for my axoloti, but now Iā€™m also thinking of getting a Teensy as they can easily be turned/used in a eurorack module as youā€™ve done.

Iā€™m following this with great interest, and might try to build one sooner or later, that i2c expander is a nice idea too !

PS: I believe yourā€™re right about the sometimes-non-powering-issue, Iā€™ve had the same problem with a RadioMusic module in my eurorack case, and itā€™s definitely related to the 12V power line (it works perfectly with other racks) so Iā€™m also curious about your workaround :wink:

1 Like
#41

Iā€™ve started writing a bit of a breakdown about how the module works, first part here http://www.cutlasses.co.uk/tech/glitch-delay-how-it-works-part-1/

1 Like
#42

Please share this if/when you get around to it!

#43

ayyyyyyyy http://cdm.link/2018/02/glitch-delay-eurorack-module-can-make-makes-lovely-music/
:smiley::heartbeat::tada:

5 Likes
#44

Yeah, I was super pleased about that!!

2 Likes