On Sun, Dec 23, 2012 at 1:49 AM, Ed Kelly <[email protected]> wrote:
> Hey Mark, > > RIAA - the original RIAA curve is the one, forget the variants, especially > the IEC variety. > It's a high-frequency pre-emphasis filter that overcomes the inherent > surface noise of vinyl by boosting the HF, and reducing the. bass so that > the needle doesn't jump out of the groove. > But doesn't this greatly matter on where on the vinyl you are? As the more inner track takes a much more narrow curve, different frequencies in the surface noise arrise. At least that's how I understand it and why mastering for vinyl is quite a different trade as it is for other media. drmr > Also, the curve you most commonly see is the reproduction (de-emphasis) > curve (the one which slopes downwards) - this is irrelevant, since anything > you play the vinyl back on will have this frequency response built-in. The > recording curve is the one which matters - I think it should not be too > hard to implement the original equation in C, or even using exp~ or fexp~ - > just to send it to the lathe. > > The problem is that the mechanical nature of vinyl means that, a standard > 6dB/octave single-pole highpass filter won't work, because the > amplification needed to restore the bass would be too great. It's a sort of > "kinked" highpass filter. See this article: > http://www.stereophile.com/features/cut_and_thrust_riaa_lp_equalization > > Also, the mix must be mono compatible. This mostly means keeping bass > frequencies in-phase and trying to make everything below about 220Hz mono. > > Metastudio 4. I call that a "lost" metastudio, because I variously did and > didn't distribute (leak) it on a personal basis (I was slack/busy, I had > kids, you know...) > > Metastudio 5 on the other hand, is currently being worked on. New > synthesis units based on analogue wavefolding techniques, the tracker > sequencer with cut and paste, and the quadtracker - a monster 4-channel > tracker style sequencer. I need to write a whole load of help files this > time also, and some more explicative performance patches...early 2013 > > Cheers, > Ed > > Gemnotes-0.2: Live music notation for Pure Data, now with dynamics! > http://sharktracks.co.uk/ > > ------------------------------ > *From:* me.grimm <[email protected]> > *To:* Ed Kelly <[email protected]> > *Cc:* "[email protected]" <[email protected]> > *Sent:* Friday, 21 December 2012, 14:40 > > *Subject:* Re: [PD] mastering to vinyl live w/ pd > > hey all thanks for the tips! > > nicolas: your phasemeter looks great. i will use that. > > but what is a riaa filter then? is there an implementation in pd? from eds > link it looks like there is two such curves. one original RIAA curve and > the other as RIAA/IEC curve. > > btw nicolas your website looks super great and slick. im curious on the > topography record you made. any for sale? sound samples? > > ed: thanks for reminding me of your metastudio project. i just revisited > and remembered all the nice stuff you had going on. were not you promoting > a version 4 at one point? what happened to that? > > hopefully ill get something cutting over break before the next semester > starts! > > m > > On Thu, Dec 20, 2012 at 6:57 AM, Ed Kelly <[email protected]> wrote: > > These are some abstractions I have made that do some of what you are > asking...the compressor~ is vanilla. > Mastering is primarily about developing "golden ears" but you also need to > take into account the RIAA curve: http://www.tanker.se/lidstrom/riaa.htm > > Remember it's mechanical - I understand that once the RIAA is taken into > account, the most pressing issue is bass - extreme bass and the needle > jumps, too much and the track is too wide so you get less time. If it's set > up wrong then tracks will overlap (but there could be some interesting > "jumping record" experiments in there. > > Best, > Ed > > Gemnotes-0.2: Live music notation for Pure Data, now with dynamics! > http://sharktracks.co.uk/ > > > > ----- Original Message ----- > > From: Lorenzo Sutton <[email protected]> > > To: [email protected] > > Cc: > > Sent: Wednesday, 19 December 2012, 21:23 > > Subject: Re: [PD] mastering to vinyl live w/ pd > > > > > > > > On 19/12/12 03:10, me.grimm wrote: > >> does anyone know much about mastering? i dont..... > >> > >> anyway i have this record recorder/cutter/lathe and was thinking of > >> doing something like this: > >> > >> http://www.youtube.com/watch?v=TDnpXVUKXM0 > > > > Very interesting--- thanks for sharing, I couldn't resist noting (and > > continuously concentrating) on the ground loop (maybe empathised by the > > woofer..) I'm not totally sure that was intended though .. > >> > >> which is funny because i have a similar recorder. although i was > >> thinking just cutting in real-time straight from PD. but to get the > best > >> sound maybe i could run it through some kind of "mastering" > > patch. has > >> anyone made such a thing or know best to do in terms of getting decent > >> masters right from PD? I would think something like: > > > > Emulating it as well? I know you lose all the materic thing, but it > > could be fun. > > > > The voice as heard in the video has something fascinating, it would be > > interesting to find out what modern digital audio compressions (data > > such as mp3, ogg etc. can create similar suggetions...) > > > > Lorenzo. > >> > >> [equilizer~] - but what one? [adaptive/nlms3~]? adaptive_equilization > >> example which im not sure i would know how to use for this > >> | > >> [unauthorized/compressor~] - although there is prob a good vanilla one > no? > >> | > >> [expander~] ??? > >> | > >> [exciter~] > >> | > >> [zexy/limiter~] > >> | > >> [hip~ 40] > >> | > >> [lop~ 16000] > >> | > >> [dac~] > >> > >> > >> but i might just make a mess with this.... > >> > >> m > >> > >> > >> _______________________________________________ > >> [email protected] mailing list > >> UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > >> > > > > > > _______________________________________________ > > [email protected] mailing list > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > > > > > -- > ____________________ > m.e.grimm | m.f.a | ed.m. > [email protected] > _________________________________ > > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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