UPNADAM said:
Thanks for the help. I was at a music store yesterday and the salesperson told me all compressors were the same? Now I saw a Behringer ($79.00), a Sampson ($149.00), and Lechicon ($199.00). I called and asked about the RNC just now and they do not carry it.
I will visit RNC website.
Upnadam,
Not all compressors are the same. As a newbie, I don't want to confuse you, but do not believe what that salesperson told you.
These are the basic definitions:
A LIMITER is a device which stops the output of a signal path going above a pre-determined level.
A COMPRESSOR is a device which reduces the dynamic range of program material.
A 'perfect' compressor is an amplifier where the input/output ratio is constant: So, when using a compressor with a 2:1 ratio, increasing the input by 2dB gives a corresponding 1dB increase in the output.
Early compressors which used variable mu thermionic tubes or photoelectric devices only approximated true compression over a limited range. They had a soft 'threshold' where compression started and held to a predictable ratio up to a certain level, then they returned to a more linear amplification allowing transients through.
This is in stark contrast to modern VCA compressor/limiters where designers thought it 'sensible' to combine the functions of a compressor and a limiter to 'stonewall' any and all signals above a certain level. The musical effect of this is that VCA compressors sound muddy and flat, while old 'Vintage' type compressors sound lively and retain high end sparkle.
A good VCA compressor limiter will do a good job making medium wave radio sound a bit louder and protecting a radio transmitter from exploding, but it is a poor tool for making a voice track stand out in a project or recording studio.
Do your homework, look at a few of them. If your willing to spend $300.00, you will get a good compressor. Decide what applications you really want it for. If it is vocal, and guitars, a photo-optical may be your best choice. Take some time, ask more questions, and you will end up with a good unit. Just make sure you get one that meets your application needs.
Alan Hyatt
PMI Audio Group