Made 2 videos:

Compressor + Sample Rate:


+Chorus:


The circuit on the left is the compressor and the sample rate reducer on the right.

Note: there are 2 noises
1. Crackling: this is from using a Max1044 bipolar charge pump to supply a -9v for the Sample and Hold chip.
It goes away when I use 2 battery's so not too worried about it.
2. High pitched squeal: again goes away when using 2 batteries.

Quite pleased with the results, but any suggestions as to what contributes to a lo-fi sound?
Got 1.Compressor 2. Sample rate reduction 3. Vibrato for pitch warbles.

Gonna add a low-pass filter to kill the highs.
Funny how there's quite a bit of thought into getting something to sound worse!

Regards,
Matt.

Oh and there's an LDR attached to the sample rate control.
That's why it responds to when I wave my hand over it.
ie darker increases sample rate and vice versa.
Nifty little thing that ?

So cool what you have been up to bro. 8)
I'm almost expecting a thread in which you've tackled a multi fx pedal!! ?

Quick update:

Took the prototype Sample Rate reducer and added a Blend control:





Check out the video:


It works great! ?
But I still haven't solved the power supply issue - it currently needs 2 separate 9v adapters.
(Thats why there's an extra cable sticking out!)
It's dead quiet as well - just compare the hissing and squeals in the first videos to the final one.

I'll add one of these when time permits:
http://www.generalguitargadgets.com/projects/24-power-supplies/137-bipolar-power-supply

Also changed the final layout for more options with the Chorus/Vibrato:

Nice one dude!

The board seems to be getting there!
Decided to use SMD resistors and op amps because I haven't used SMD before and gotta learn sometime.

No SMD this time, now just waiting on parts.
RSComponents are quite expensive but you can't beat their free delivery!

Finished!

...Except for 1 last voltage regulator - gonna raid Mantech tomorrow.
This pedal even runs off 12V, how cool is that? I am totally a rockstar 8)





Will post clips tomorrow ?

Matt.

Really impressive dude. Cant wait for clips!!!

Couple of hours on illustrator and enclosure done!



Bipolar power supply works great!
Initially I fried both my 7909 negative voltage because I assumed it had the same pinout as the 78XX series.

Oh and forgot to mention I dropped the compressor - was too subtle an effect.
Replaced it with a resonant wah type filter for an interesting take on a tone control.

Both the Filter and the Sample Rate Reducer are switchable on and off with the 2 toggle switches at the top.

Goes [In] -> [Filter] -> [Vibrato/Chorus] -> [Sample Rate Reducer] -> [Out]

Regards,
Matt.

It works?



Renamed it to "Nonsense Engine".
Evolved more into a synth type effect rather then a lofi simulator.

Check the Youtube clip:


The Filter and Sample Rate Sections are still suffering from noise but confident it'll soon be quiet as a kerkmuis.

Matt.