Chorus Curiosity

[wagnar]

Hello folks,

I had built a Little Angel Chorus. Uses a PT2399 chip.

Everything is working as it should but while testing I had realized the notes are coming from amp with very small, (maybe insignificant) delay.

Is it normal with these circuits or should I order another pieces for substitute of IC ?

[ElectricDruid]

That's normal.

For chorus, ideally the delay should be so short as to be imperceptible. The PT2399 doesn't really manage that (it won't go fast enough to make a delay that short), so the Little Angel is at the "long" end of the spectrum for chorus pedals, but it should still be more of a chorus effect than a delay effect.

You should still get the dry signal with no delay though - if you're only hearing delayed (wet) notes then there's something wrong. A proper chorus is a mixture of the dry signal and the modulated delayed signal.

[Mark Hammer]

What E.D. said.

Though the delay range for what produces flanging is fairly narrow, "chorus" can be produced over a much broader range of possible delay times.  So, it could be varying delay between 2msec and 10msec, or 6-18msec, or 20-30msec, or whatever.

I'm of the view that what gets called "doubling" is essentially chorus with a little more delay.  When we think "chorus", we think two or more musicians working from the same score and playing/singing the same thing at very close to the same time, because they are working from a score.  When a track is "doubled", however, the musician is attempting to copy or play against something already recorded.  That means they need to hear the recorded track/s before responding to follow along.  You get the same thickening and slight pitch deviations as chorus, but the need to hear-and-respond introduces a slightly longer delay.

The PT2399 has a hard time achieving anything less than around 20msec.  The delay time in a Boss CE-2 is much less than that.  So, as Tom noted, your sense that there is a bit of a delay is accurate.

[wagnar]

Thanks for your time and info.
I have tested after what you said and what I am hearing is the start strum signal "again".
So yes nothing is wrong with the circuit. Wet and Dry are mixed as they should be.
Thanks for your time. I will now look further and read up some similar effects and how they operate.