Homemade Reverb

[Aharon]

I'm interested !! I don't know what's available as "features" with those chips,what's possible?.

Aharon

[The Tone God]

Awhile back I made a custom reverb unit with switchable controls so you could do presets. It has dwell and mix controls too. Even a "pure" reverb mode without orginal signal would be neat.

Andrew

[Marcos - Munky]

Looks a good idea. The reverb is the only effect that I didn't saw any  homebrew version.

[aron]

A DIY reverb would be cool.

I would imagine the usual:

Blend, highpass filter, lowpass filter, density?

[petemoore59]

Reverb...I like a little bit nearly all the time.  I also like alot once in a while.
 Actually I think both reverbs and echoes kind of fall into the same category and can mix well when one is added to the other.
  I would liek to have many reverbs...one for basic reverb [small] another for heavier [dual] reverb sounds , and one or two for vocals [one stompswitched reverb at the base of the cim stand would be a great thing for stage].
 So for me finding applications for reverbs isn't an issue...
 Having one unit that could fairly seamlessly switch between light to Med. or Heavy reverb is one concept.
 Conversly, having a 'base floor' reverb [light-med. reverb] then adding another rev or echo to it for 'effect' type reverb sounds is the other concept.
 An example of a rare instance where reverb is heard being dialed down on an album is during the lead of "that Smell' [Skynerd] and it actually fits the tone of the moment in the song.
 I wouldn't know where to start, or how difficult it would be to implement, but a ramp up reverb [would sound like turning up the effect send on a board, instead of 'jumping' on] would be neat and make it easier to use without having the seam show [big difference between bypass/effect when it is turned on].
 Whoops...Idea...blend rocker pedal for panning light/heavy reverb...or rverb/straight. A fairly amount of trouble but would be neat.

[edwinT]

some really long reverbs with tone controls and possibility of making it oscillate..

Any interest in a circuit for a homebrew reverb?  To do a convincing simulation would take 6 of the Princeton PT2399 chips at $4 each, or about  $24 for the delay chips plus a couple of opamps.  

What extra features would you like to see?

regards, Jack

[Peter Snowberg]

In the next few days I'll post the design for an inexpensive DSP based reverb board with dual DSPs and 24 bit A/D/A and 28 bit internal processing.

Other quick specs: Stereo in/out, 48K sample rate, guitar friendly inputs,  1.36 seconds of delay memory, base effect types: room reverbs (3), plate reverbs (3), hall reverbs (2), room with chorus (2), delays(2), rotary speaker emulator, flanger, chorus. Use any two effects at once. Future effects upgrades, Program your own!  9VDC power, input level, mix, clip leds.

This is a design that I'm retaining all commercial rights to, but I'm granting a license to any individual to build this box for themselves or their friends provided it is not done for profit.

I will eventually be providing a kit of all parts, but everything is already available off the shelf.

Stay tuned for more details.

[petemoore59]

Reverb is the one effect I use more than any other ['ontime'-wise].
 My Boss is RV3 getting kinda beat...one pot is damaged ['loose' shaft], it gets noisey and I have to cut/repower it to get it to quiet down again. etc.
 I went to some lengths trying 'physical' [mechanical?] reverbs...the 'speakers [driver/pickup] on a spring type<>and a 'water' reverb...
 the 'driver>spring>pickup' type almost had some promise [high Quality parts and some retro engineering might make it pretty kool]
 ...the 'water' [speaker and mic 'sealed' and immersed in water]> total nogo
 Of course neither of these would fit in a reasonable' sized stompboxx...

[troubledtom]

reverse mode, :twisted:
        cool,
          - tom

[Maneco]

Does the dsp reverb project uses alesis chips?where to buy them?
thanks and congratulatios for this project  

[Peter Snowberg]

Thanks Maneco. Yes, at least my DSP reverb will be based on Alesis DSPs. I would love to see a PT2399 reverb here too.

In order to use the buffer memory in two (or more) Alesis SCRs serially, I have included some additional signal routing logic, but the built-in effects are all Alesis algorithms. In the near future, people will be able to program the pedal with their own code. I hope people will be inclined to share algorithms. I'm looking forward to sharring the ones I write.

Alesis-Semi has a distributer but their web site is not responding right now. I have been working with sample chips.

I have a question for everybody.... How much buffer time do you need to see an echo as really useful? Thanks!

-Peter

[Nasse]

:roll: If you can make it sound like those Ventures weird but classic reverb tricks that snap, crackle and pop, it will be super coool

[amz-fx]

In the next few days I'll post the design for an inexpensive DSP based reverb board with dual DSPs and 24 bit A/D/A and 28 bit internal processing.

Excellent! I look forward to seeing it.

I was digging around my dusty archives looking for some info I had saved on reverbs but cannot find it yet. Looks like I'll have to dig into the boxes in the garage. Yikes!

regards, Jack

[Maneco]

Hello...
is it possible to getsamples from these chips'
in order to get some kind of echo,you need more than 200 mseconds,analog delays like boss dm2 or ibanez ad80 go up to 300 ms

[DaveTV]

A DIY reverb pedal would be an interesting build. I say this after just today building a bypass switch box for my Alesis Nanoverb so I can use it like a pedal.

[moosapotamus]

Any interest in a circuit for a homebrew reverb?  To do a convincing simulation would take 6 of the Princeton PT2399 chips at $4 each, or about  $24 for the delay chips plus a couple of opamps.  

What extra features would you like to see?

regards, Jack

That sounds like a great idea, Jack. I'd certainly be interested.

As for features, other than depth/intensity, how far out could it get? I'm guessing, not as far out as digital reverbs? But... different delay characteristics/reverb types? A range of delay times, from flanging to echo? Reverse? How far would be out?

~ Charlie

[jrc4558]

I know it's been more than a year since the last posting, but...

Any news on the DIY reverb topic?

And apologies if I missed it somewhere in the htreads.

Cheers.

[brett]

Hi.
I've got a couple of PT2399-based delays.  I'm a bit surprised that Jack was going to use several, because just one gives quite a "spacey" delay.  

I know that eveybody WANTS 500msecond of delay, but I find I mostly use 50 to 200 ms.  (200ms is the delay you get off the back wall of a room 110 feet deep! 500ms simulates a stadium.)

cheers

[jrc4558]

but the trick to reverb is that you have to have more than one, in other word, a multi-tap delay...

[brett]

Oops!  I didn't make myself clear.  :oops:

What I meant was:  Do 6 PT2399s sound much better than 3 or 4 ?

cheers
Brett