RIAA phono eq curve

[Philip Schleihauf]

On Thu, Mar 19, 2009 at 9:21 AM, suemac at empire.net <suemac at empire.net> wrote:
>
> >
> >
> >
> >Original Message:
> >-----------------
> >From: Sean Corbett seanbutnotheard at gmail.com
> >Date: Thu, 19 Mar 2009 08:56:36 -0400
> >To: ubuntu-studio-users at lists.ubuntu.com, phil at magnustudios.com
> >Subject: Re: RIAA phono eq curve
> >
> >
> >> ------------------------------
> >>
> >> Message: 3
> >> Date: Wed, 18 Mar 2009 12:31:54 -0400
> >> From: Phil <phil at magnustudios.com>
> >> Subject: RIAA phono eq curve
> >> To: Ubuntu Studio Users Help and Discussion
> >>        <ubuntu-studio-users at lists.ubuntu.com>
> >> Message-ID:
> >>        <d20263c0903180931y2903247di36f1d8379bff89ed at mail.gmail.com>
> >> Content-Type: text/plain; charset="iso-8859-1"
> >>
> >> Hey,
> >>
> >> I've got a large collection of vinyl records I need to record onto CD, or
> >> some other digital format. I've got a stereo with phono inputs, so I
> could
> >> use that for the preamp, but I'd rather take the phono player directly
> into
> >> my firebox and correct the EQ digitally.
> >>
> >> I've done a bit of research on what I need to do. I need a really
> accurate
> >> diagram of the RIAA phono curve. The best I've found so far is the one at
> >> wikipedia, http://en.wikipedia.org/wiki/File:RIAA-EQ-Curve.svg . It's
> only
> >> got the markings for 20, 1000, and 20000 Hz. I guess it's got to be a
> >> logarhythmic graph so I should be able to use it to acurately find the
> other
> >> frequency levels.
> >>
> >> What I'm hoping for is that someone has already done this and has made a
> >> preset for a ladspa plugin, or for jamin. Does anyone know of this?
> >>
> >> If not, I'll make mine publicly available when I do it.
> >>
> >> Thanks,
> >>
> >> Phil
> >> phil at magnustudios.com
> >
> >Audacity has the RIAA curve built in... Just record your vinyl, select
> >the whole recording, and go to Effect>Equalization... and select
> >'RIAA' from the 'Select Curve' dropdown at the bottom.  I've never
> >done this myself though, so I can't vouch for its accuracy.
> >
> >--
> >Sean Corbett
> >
>
> Also nicely done RIAA kit from Elliot Sound:
>
> http://sound.westhost.com/project06.htm
>
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Alright thanks for all the responses.

In terms of the noise from the firebox: I'm going to try it out, and
see how good it is. I'm going to hook up the phono and look at the
noise I get through jamin - I think it's mostly high-frequency, so it
shouldn't be to much of a problem after the RIAA curve is applied. If
it's not working, I'll just run the signal through my stereo, which
has phono inputs.

All the other info is useful. Although using audacity looks easy, I
think if the firebox works out I will be using ardour, probably routed
through JAMin for the hdEQ. That way I can just stick in the CD track
markers and go right to a CD. If I do this I'll make my .jam file
publicly available somewhere so other people can use it too.

That RIAA kit looks really neat. Maybe I'll have a go at it when I get
some time.

Thanks!

Phil