madbeanpedals::forum

Projects => General Questions => Topic started by: hammerheadmusicman on January 05, 2013, 03:18:30 PM

Title: Vocal pedals..
Post by: hammerheadmusicman on January 05, 2013, 03:18:30 PM

So my girlfriend is a vocalist, and I've been telling her to buy some good pedals for ages, verb, delay, some kind of modulation..

Then recently I started thinking, would I be able to make some..

Have any of you guys had any experience with building vocal pedals? Or do you know of any circuits that could be modded for vox?

Thanks

George

Title: Re: Vocal pedals..
Post by: jtn191 on January 05, 2013, 03:56:01 PM

delay and reverb seem the most useful. I could also see the use for compressor and maybe some dirt pedals (my friend tried using a way huge swollen pickle iirc but it was pretty feedback prone).

The main issues I see would be input impedance and making sure the input level isn't too low or so high that it clips opamps etc when that's not intended

My friend who led church services used a store-bought pitch correction pedal. The idea of that blew my mind

Title: Re: Vocal pedals..
Post by: hammerheadmusicman on January 05, 2013, 04:05:36 PM

Yeah i was thinking about the possible impedance Issues, delay and reverb are definitely the main ones I'm thinking of tbh..


Thanks

George

Title: Re: Vocal pedals..
Post by: DutchMF on January 05, 2013, 04:23:19 PM

The singer from my band has been using guitar pedals for over 20 years. Current setup is a vintage Ibanez flanger (so want to steal that from him!), cheap-ass Beringer delay and a Seymour Duncan Tweak Fuzz. He uses these for both vocals and his blues harps, sounds friggin' awesome! And the whole impedance issue doesn't matter, he just uses some XLR-to-jack adaptors, straight into the mixer, sounds good!

Paul

Title: Re: Vocal pedals..
Post by: hammerheadmusicman on January 05, 2013, 04:35:00 PM

Gonna get testing..

http://colomar.com/Shavano/intro_opamp2.html

What do you reckon to the 'XLR low input impedance from that page^

George

Title: Re: Vocal pedals..
Post by: oldhousescott on January 05, 2013, 04:48:16 PM

Look for designs based on the SSM2019 or INA217, both integrated mic pre chips. You could use an NE5532, but it would require more support circuitry.

Title: Re: Vocal pedals..
Post by: dwstanford on January 11, 2013, 02:13:00 PM

You may find useful the xlr adapters that have a transformer to go from mic level (lo-z) to hi-z(guitar).  This should clear up most impedance issues, but can limit your headroom a bit.  There are always going to be sound quality issues with this sort of thing, but pedals are designed to destroy or add distortion to your audio most of the time anyway.