delay and chorus in 1 idea! ....thoughts?

[deadastronaut]

ok so ive been messing around with the one chip chorus, and la chorus on breadboard..

when i had a thought......oh no not again!!!!..

heres me thinking aloud, so bear with me ok...

if i take a (for example)  rebote delay, and put a nice equal/smooth up n down lfo onto the delay time pot (switchable)

would we get chorus out of it , say at fast delay speeds?....seeing as when you play a rebote and wiggle the time pot gently thats what you get!...

that way we could have delay or chorus in 1.....sounds like it should work.......erm.....in theory anyway....

any thoughts.....

[artifus]

yup, flanger too... all time based fx. a decent delay unit with variable modulation and feedback controls should deliver chorus, flanging and delay/reverb fx. not familiar enough with the pt2339 and its limitations to say why this hasn't been implemented in an all in one yet  - not looked into diy delay much.

https://en.wikipedia.org/wiki/Delay_(audio_effect)#Uses

[deadastronaut]

hmmm i thought so,  yeah ive only just started messing with the pt2399 on breadboard...good fun to be had with it...

hmmmm i have a rebote built, i think i'll knock up an lfo (from the lightwah) that goes nice and slow to fast...and most importantly pulses, rather than on/off ...

thinking aloud again, if i used the good old led/ldr combo, it should be nice and easy to add on to it too....hmmmm....

[deadastronaut]

i'll try this lfo...

[J0K3RX]

Sounds like a cool idea!!! You could call it Deloris?

[frequencycentral]

You could call it 'Echo Base' 

[slacker]

Yep, hacking an LFO into a rebote is exactly where the whole Echo Base adventure started. I'd be tempted to try it the other way round and mod an LA into a delay.

[deadastronaut]

You could call it 'Echo Base' 

yeah..i did think of that.... but the modulation on the EB is on the delayed sound only?...not the played note!...IIRC?

[deadastronaut]

Yep, hacking an LFO into a rebote is exactly where the whole Echo Base adventure started. I'd be tempted to try it the other way round and mod an LA into a delay.

Yeah i see where your going, it would be better that way round....but  it would have to switch between the 'pin6' fix , not sure whether that would 'upset' the pt2399 or not...

anyway, just me thinking aloud...... ....i'll mess about while i have the la on bread..

am i right in saying that the modulation on the EB is only on the delayed note though...hence your suggestion?.

i loved my EB, but alas i sold it (it went to a good home though!) i'm just into 1590b size stuff now...thats why i want to tinker a bit..

[anchovie]

am i right in saying that the modulation on the EB is only on the delayed note though?...

That's how a chorus works too, though - it's just that the delay is very short in that case. You need a signal in a delay line to be able to modulate it.

If you want a chorus with echo then you'll need to build...er...a chorus circuit followed by a delay circuit!

[deadastronaut]

   gotcha!....i was after a chorus or echo..(switchable)

yeah i'll try it that way round then, i have a nasty feeling the pin6 fix will get a bit moody being switched on/off though....

i'll experimenrt...cheers guys,

[slacker]

I just suggested starting with the LA as a different way of doing it. which ever way you go you'll probably have to compromise one of the functions so I'd start with a circuit that gives you the one you want most.

[Mark Hammer]

The trouble is that the delay range needed for suitable chorussing is often too short for the delay times needed to achieve audible echoes.  For chorus that has a ring of familiarity, you'll want to be able to get down to 20msec or less.  That tends not to be usable delay time for producing "delays".

I suppose you can always dial out all feedback, but chorus never has feedback involved.  Any circuits I've seen that try to incorporate a flanger and chorus in one unit will have automatic cancellation of feedback when switching over from flanger to chorus.

[merlinb]

Yeah i see where your going, it would be better that way round....but  it would have to switch between the 'pin6' fix , not sure whether that would 'upset' the pt2399 or not...

You don't need to switch out the pin6 fix, you can leave it in. Just switch put a delay-time pot in series with pin6. If the footswitch is arranged to short out the pot then you can flip between echo and chorus, though you might get some strange sounds when hitting the switch.
You also might not even need to turn off the LFO, because the wobulation may be so small that you don't notice it during echo mode...