Stepping Phase shifter

Reply to Stepping Phase shifter on Sat, 07 Oct 2017 20:10:54 GMT

phil123456 — Sat, 07 Oct 2017 20:10:54 GMT

Hi,

How can I make a phase shifter in puredata ?

this one has a step function that I want to reproduce ( at time 4:51 )

thanks

Reply to Stepping Phase shifter on Sat, 07 Oct 2017 20:33:06 GMT

whale-av — Sat, 07 Oct 2017 20:33:06 GMT

@phil123456 Have a look in your pd installation folder "Pd/doc/3.audio.examples/H15.phaser.pd......

You will find an example of an echo with feedback (or the feedback will be easy to implement) in the same folder..
Then feed the output of the echo into the phaser and you will have what you want..... with a little work......
David.

Reply to Stepping Phase shifter on Sun, 08 Oct 2017 06:57:10 GMT

phil123456 — Sun, 08 Oct 2017 06:57:10 GMT

so you confirm a phase shifter is a pd phasor

but what's with the echo ? it does not sound like an echo in the video at all, more like some stepping function on some phasor parameter

Reply to Stepping Phase shifter on Sun, 08 Oct 2017 08:59:49 GMT

whale-av — Sun, 08 Oct 2017 08:59:49 GMT

@phil123456 He plays a series of notes, which are then repeated...... as he says you hear the pattern better when he speeds it up and it is certainly repeated with a fading echo.
I just listened a bit further (single notes) and I am pretty sure it is an echo with "phaser" applied........ confirm?.... probably.

Here you go....... I don't have a guitar to check it with...... and I wouldn't be able to play it anyway!...... but........
step_phaser.pd

For Vanilla you will have to replace the "output~" module.......
David.

Reply to Stepping Phase shifter on Sun, 08 Oct 2017 14:22:54 GMT

phil123456 — Sun, 08 Oct 2017 14:22:54 GMT

1st, thanks a lot for the effort and sharing the pd file, thx

but I respectfully disagree in the sense that the sound of the video has no delay/feedback

I believe the "phase of the phasor" is focibly incremented through time to give that "stepping" effect, the sound of theguitar has no echo on it ( @ 5:13, one can hear the pattern )

further in the video one can hear a pattern, so maybe the pedal has some lookup table of offsets that gets fed into the phasor

I'll play around with your file

thanks anyway

Reply to Stepping Phase shifter on Sun, 08 Oct 2017 17:08:49 GMT

weightless — Sun, 08 Oct 2017 17:08:49 GMT

@phil123456 Hi, I think the effect comes from a stepped lfo that changes the allpass coefficients. You can achieve something like this with [samphold~]. This is a quick attempt based on the H15.phasor example.

H15.phasor.stepped.pd

Reply to Stepping Phase shifter on Mon, 09 Oct 2017 18:41:47 GMT

phil123456 — Mon, 09 Oct 2017 18:41:47 GMT

@weightless totaly

really nice

thanks, this is really it

Reply to Stepping Phase shifter on Mon, 09 Oct 2017 19:57:13 GMT

seb-harmonik.ar — Mon, 09 Oct 2017 19:57:13 GMT

I think "res" corresponds to feedback which I think can be made by feeding the output back into the input of the all pass chain

Reply to Stepping Phase shifter on Mon, 09 Oct 2017 19:33:59 GMT

weightless — Mon, 09 Oct 2017 19:33:59 GMT

@phil123456 This is a slightly better effort, I think it gets you closer to the pedal and the feedback (aka "res") makes it more obvious.

phaser.stepped.zip