New Effect: Payback v1.1

[The Tone God]

Hello everyone.

It is finally here! The long awaited for update, Payback v1.1. It is smaller, simpler, and uses current production parts all the while still keeping most of your favourite features of Payback v1.0. You can find the article here:

The Tone God's Domain

Enjoy.

Your Tone God,

Andrew

[aron]

Wow. It would take years to understand what is going on in that circuit. Amazing!

[Processaurus]

Thanks for the article, I've been wamting to make a lo fi looper for a while, but I was holding out for a good way to put a pitch knob on there (like cassette 4 tracks).  The bit about being able to set the clock on these isd16xx chips with a resistor to ground looks like the ticket.

[The Tone God]

My guess is that the switch over to a resistor is so they don't have to produce so many ICs with different clock settings. Smart thing IMHO and makes our vibrato lives easier too. I hated the power vibrato method.

If you want to fix the pitch change you can leave the clock input off and just use the depth pot. If used in combination with the grounding transistor when you record it will be correct speed then on playback it will be the new pitch. You can increase the pot value for even more pitch change.

Andrew

[nelson]

I think you could cludge a clean pitch shifter from this if you very quickly shifted from playback to record over and over. There would be minimal delay in the output signal.

Depends how quickly the playback/record functions can be switched and how well they stand up to that abuse.

Just an idea from reading your article.

[The Tone God]

I thought about that and even tried it but when working in short loops the delay between rec/play becomes more noticeable. A short time discrepancy over a period seconds is not as noticeable which is probably why the IC works for this application. Oh and don't try to make a delay out of these either.

Everyone has to remember that these ICs were not intended for these tasks. They are for cheap toy audio playback, answering machines, voice message recorders, etc. They are not intended for what we are doing here. They are only list for 100,000 cycles which is ok for a sampler but for something like a delay this will not last that long.

Andrew

[nelson]

I thought about that and even tried it but when working in short loops the delay between rec/play becomes more noticeable. A short time discrepancy over a period seconds is not as noticeable which is probably why the IC works for this application. Oh and don't try to make a delay out of these either.

Everyone has to remember that these ICs were not intended for these tasks. They are for cheap toy audio playback, answering machines, voice message recorders, etc. They are not intended for what we are doing here. They are only list for 100,000 cycles which is ok for a sampler but for something like a delay this will not last that long.

Andrew

Damn! The search for a clean DIY octave/pitch shifter that doesnt require DSP skills goes on.

[nelson]

I am doing a PCB layout in Eagle for this. I will include a clock for the vibrato function and remove the tone control. I might also increase the volume of the recorded output signal. Sometimes it is good with a looper to have the recorded playing louder than the played.

[The Tone God]

Damn! The search for a clean DIY octave/pitch shifter that doesnt require DSP skills goes on.

I was disappointed too as I was trying to do just that. What it does do well is a "slowing down record" effect. Also if you are willing to do the work the sound on sound effect is not bad.

I am doing a PCB layout in Eagle for this. I will include a clock for the vibrato function and remove the tone control. I might also increase the volume of the recorded output signal. Sometimes it is good with a looper to have the recorded playing louder than the played.

WOW you work fast! I don't see losing the tone control as a big loss. If someone wants the function they can add the pot and jumper the connection from the REC pot easily enough. I did think about using another tone stack to play with the output like a BMP stack. The vibrato is so easy to add now too so that would be great.

You can adjust the mix level by playing with the 100K mixing. Actually my back up plan if I had not come up with Two Lane for FX-X last month was going to be Payback v1.1 with a dual pot replacing the 100K mixing stage. It would have been a cop out but hey I was getting desperate in that last hour. If I were to build a boxed version I would probably still use the Payback v1.0 analog section. The mixing and controls are better IMHO. What I gave with the v1.1 was just enough to make the thing work.

Andrew

[Morocotopo]

Great Andrew, thanks for your work.

I was planning on doing a PCB, but Nelson beat me. Good, cause I´m a little short on time. Nelson, can you generate a graphic file from your work in Eagle for etching, for those of us who don´t use/have Eagle?

Thanks

Morocotopo