Transfer LP TO CD

mgjsmith · 6th December 2010, 10:05 PM

I am considering the construction of a "simple" phono preamp to connect my old Ariston RD40 turntable with MC cartridge to my pc to enable the transfer of some old lp recordings. Can anyone offer some guidance on suitable circuits solid state or tube. Martin

mickeymoose · 8th December 2010, 03:13 PM

nch.com offers a Vinyl to CD software package with a30 day free trial. Check it out. E

richie00boy · 8th December 2010, 03:55 PM

Are you sure it's an MC cartridge not MM?

I would avoid software RIAA correction as the dynamic range is poor.

MrSlim · 8th December 2010, 09:07 PM

The Hagerman Bugle: Hagerman Technology LLC: Bugle Opamp Moving Magnet Budget Phonostage DIY Kit is well regarded. I've built one, and it's what I am planning on using to do my LP to digital conversion.

Even these: Phonopreamps.com Home Page are pretty decent from what I have read..

MrSlim · 8th December 2010, 09:12 PM

Check out this thread..
Ultrasimple mm/mc RIAA preamp 2

planet10 · 8th December 2010, 09:20 PM

Quote:

Originally Posted by richie00boy

I would avoid software RIAA correction as the dynamic range is poor.

There is an AES paper by the guy from Channel D that may have you rethinking that. I will be trying his solution soon in conjunction with an Edirol FA66

dave

Calvin · 9th December 2010, 07:59 AM

Hi,

richie00boy is correct. Software equalizing costs on dynamic range.
Each Bit represents app. 6dB of dynamic range. The RIAA-curvature spans roughly a 40dB range between 20Hz and 20kHz, So one has to spare 7bits for the equing alone. Add to this a headroom of 1 to 2 bits to avoid clipping and you end up with at least 8 to 9 Bits of the ADC´s resolution. In case of a 20Bit ADC this means that just 11-12 bits are left free, representing a marginal dynamic range of just 66-72dB.
This dynamic range is only applicable in the case that the ADC is supplied with just the right voltage levels for it´s reference voltage and signal input voltage. Since most ADC´s reference voltage settle between 3.3V and 5V the phono-cartridge signal requires linear amplification, or the reference voltage needs to be lowered to match the cartridges output voltage. The latter costs resolution because of noise issues. The former would be the preferrably solution, but if You need amplification anyway, what´s the sense then in not to use hardware equing at the same and omitting with software equing alltogether?
IMHO using a fine phono-stage with linear output, driving an ADC with healthy levels of voltage is still the finest solution.

jauu
Calvin

planet10 · 9th December 2010, 09:00 AM

Read the paper, He does a MUCH more thorough analysis of the pluses & minuses. It is, IB, downloadable from his site,

CHANNEL D - Professional and Audiophile Quality Software for Vinyl, iTunes, and commercial applications

Here it is... the 2 papers at the bottom of the Pure Vinyl section.

dave

6th December 2010, 10:05 PM	#1
mgjsmith diyAudio Member Join Date: May 2010	Transfer LP TO CD I am considering the construction of a "simple" phono preamp to connect my old Ariston RD40 turntable with MC cartridge to my pc to enable the transfer of some old lp recordings. Can anyone offer some guidance on suitable circuits solid state or tube. Martin

8th December 2010, 03:55 PM	#3
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Are you sure it's an MC cartridge not MM? I would avoid software RIAA correction as the dynamic range is poor. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

9th December 2010, 09:00 AM	#8
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	Read the paper, He does a MUCH more thorough analysis of the pluses & minuses. It is, IB, downloadable from his site, CHANNEL D - Professional and Audiophile Quality Software for Vinyl, iTunes, and commercial applications Here it is... the 2 papers at the bottom of the Pure Vinyl section. dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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8th December 2010, 03:13 PM	#2
mickeymoose diyAudio Member Join Date: Nov 2008	nch.com offers a Vinyl to CD software package with a30 day free trial. Check it out. E

8th December 2010, 09:07 PM	#4
MrSlim diyAudio Member Join Date: Jun 2009 Location: Ottawa, Ontario Blog Entries: 2	The Hagerman Bugle: Hagerman Technology LLC: Bugle Opamp Moving Magnet Budget Phonostage DIY Kit is well regarded. I've built one, and it's what I am planning on using to do my LP to digital conversion. Even these: Phonopreamps.com Home Page are pretty decent from what I have read..

8th December 2010, 09:12 PM	#5
MrSlim diyAudio Member Join Date: Jun 2009 Location: Ottawa, Ontario Blog Entries: 2	Check out this thread.. Ultrasimple mm/mc RIAA preamp 2

9th December 2010, 07:59 AM	#7
Calvin diyAudio Member Join Date: Nov 2004 Location: close to Basel	Hi, richie00boy is correct. Software equalizing costs on dynamic range. Each Bit represents app. 6dB of dynamic range. The RIAA-curvature spans roughly a 40dB range between 20Hz and 20kHz, So one has to spare 7bits for the equing alone. Add to this a headroom of 1 to 2 bits to avoid clipping and you end up with at least 8 to 9 Bits of the ADC´s resolution. In case of a 20Bit ADC this means that just 11-12 bits are left free, representing a marginal dynamic range of just 66-72dB. This dynamic range is only applicable in the case that the ADC is supplied with just the right voltage levels for it´s reference voltage and signal input voltage. Since most ADC´s reference voltage settle between 3.3V and 5V the phono-cartridge signal requires linear amplification, or the reference voltage needs to be lowered to match the cartridges output voltage. The latter costs resolution because of noise issues. The former would be the preferrably solution, but if You need amplification anyway, what´s the sense then in not to use hardware equing at the same and omitting with software equing alltogether? IMHO using a fine phono-stage with linear output, driving an ADC with healthy levels of voltage is still the finest solution. jauu Calvin

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