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A phono
pre-amp 'matches' the output from the cartridge in the your
turntable to the input of your soundcard ie. the 'line in'
on your computer.
It amplifies the very small signal output coming from the
phono cartridge and changes the frequency response so the
sound is acceptable to listen to (RIAA specification).
If you
are going to use a pre-amp, then connect the phono (RCA) lead
from your turntable to the input of the pre-amp and the output
of the pre-amp to the 'Line In' on your computer soundcard,
so you will need another stereo 'phono to phono' (RCA to RCA)
lead to run from the pre-amp to your computer.
This pre-amp
will work fine to transfer LP's EP's and 45's to CD, but technically
the match (frequency response) should be different for 78
rpm, and even different 'matches' for different types of 78's.
However unless you are wanting a really professional result
then this pre-amp should be fine.
If you
are going to use an audio editor like the one included with
the 'Acondigital.com Acoustica software' then you can use
the graphic equalizer to 'tweak' the sound anyway.
It is
just worth mentioning here that if the turntable you are using
to play your 78's is fitted with a 'ceramic' or 'crystal'
cartridge, (the cartridge is the bit the stylus fits into)
these are 'high signal output' devices so you will need a
different type of pre-amp altogether. You can usually tell
if the cartridge fitted is this type as a lot of them have
a 'flip over' stylus. One side for playing LP's and 45's -
using a diamond stylus, the other for 78's - using a sapphire
stylus, each side being labelled so you know which is which.
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