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Old 12th January 2013, 08:24 AM   #71
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... just to make sure ... will the USB + ES9102 module also handle 384 kHz/24 bits? Any links to the USB module here on diyaudio?

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Old 12th January 2013, 11:19 AM   #72
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Default Head amp

Same here Using some an excellent turntable platform with good tonearm and cartridge with good wires.

What is needed in addition to your ADC, is a super low noise moving coil head amp with nominal 64 dB gain flat from say 10Hz to 100kHz, and changable gain setting from 40-70 dB for MM cartridges and low output low-output-MC cartridges a la Ortofon. DC coupled and no bias current going through the cartridge.
Tricky stuff!

Cartridge loading must be changeable, too. Both MC load and MM load. Easy stuff

Input protection for your module will be needed but of a type that has minimal affect on sonics. Preferrable DC coupled.

[QUOTE=Russ White;3321067]I am indeed excited about it, as I plan to use it to create some high quality rips of my own vinyl.

QUOTE]
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Old 12th January 2013, 03:55 PM   #73
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[QUOTE=staccatiss;3322332]Same here Using some an excellent turntable platform with good tonearm and cartridge with good wires.

What is needed in addition to your ADC, is a super low noise moving coil head amp with nominal 64 dB gain flat from say 10Hz to 100kHz, and changable gain setting from 40-70 dB for MM cartridges and low output low-output-MC cartridges a la Ortofon. DC coupled and no bias current going through the cartridge.
Tricky stuff!

Cartridge loading must be changeable, too. Both MC load and MM load. Easy stuff

Input protection for your module will be needed but of a type that has minimal affect on sonics. Preferrable DC coupled.

Quote:
Originally Posted by Russ White View Post
I am indeed excited about it, as I plan to use it to create some high quality rips of my own vinyl.

QUOTE]
You might be interested in the Retro - especially the LOW-Z version for MC. It is not well suit to MM though.
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Old 12th January 2013, 09:26 PM   #74
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Currently I use tape out of my pre connected to a laptop via an RCA to mini phone plug to do hi-res vinyl rips. They sound real good! Looking forward to seeing the ADC module and new USB module.
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Old 13th January 2013, 11:40 AM   #75
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Well Rus this really put a smile on my face - I have been looking for a topnotch ADC for some time as I have decided to put my vinyl collection onto hard disc, before decrepitude finally overcomes me.

Perhaps building in a full blown phono stage may create analogue/digital problems? re. the spec. that staccatiss has outlined. I have such a phono stage - Talk Audio's MC3 and I can say that it is a joy to use - no noise and totally versatile for loading and gain and very sensibly the PSU is a seperate item with high quality umbilical connection.

I think that if Rus does build in such a phono stage it would considerably raise the unit price?

There is no way that I would use a PC/laptop connected to the net as I would go mental if I my 1000 + LPs were lost or corrupted. With the help of my Dutch mate who is an IT man I intend to build, probably using an A/V chassis, a dedicated music storage package and backed up with at least two copies.
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Old 15th January 2013, 06:34 AM   #76
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Not sure it is low noise enough. We need something really low noise and that means using discrete devices.

I tried to buy the Retro but got an error on the web page.


Quote:
Originally Posted by Russ White View Post
You might be interested in the Retro - especially the LOW-Z version for MC. It is not well suit to MM though.
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Old 15th January 2013, 06:39 AM   #77
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I thought that Russ´ADC would internally take care of the RIAA correction, so only a flat gain head amp is needed. No RIAA correction needed which is a big relief! The ADC can handle the RIAA decoding AFAIK

One could also use a transformer instead of a head amp to get at least 20 dB gain and then use a more simple OPamp based flat gain amp. Might have some advantages to use transformers here to separate grounds, and get balanced signals with which the ADC will perform better.

Music file backup is mandatory. Best is to have one backup in a bank deposit where it is fire proof.

Quote:
Originally Posted by Black Stuart View Post
Well Rus this really put a smile on my face - I have been looking for a topnotch ADC for some time as I have decided to put my vinyl collection onto hard disc, before decrepitude finally overcomes me.

Perhaps building in a full blown phono stage may create analogue/digital problems? re. the spec. that staccatiss has outlined. I have such a phono stage - Talk Audio's MC3 and I can say that it is a joy to use - no noise and totally versatile for loading and gain and very sensibly the PSU is a seperate item with high quality umbilical connection.

I think that if Rus does build in such a phono stage it would considerably raise the unit price?

There is no way that I would use a PC/laptop connected to the net as I would go mental if I my 1000 + LPs were lost or corrupted. With the help of my Dutch mate who is an IT man I intend to build, probably using an A/V chassis, a dedicated music storage package and backed up with at least two copies.
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Old 5th March 2013, 07:10 AM   #78
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Any news?
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Old 5th March 2013, 12:00 PM   #79
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Sure I can give you an update.

I have the design about 80% complete.

I have prioritized the USB module above this module partly becuase this module will very likely be used with the USB module quite a lot.

So I am designing the USB module so that it can connect to a DAC/ADC as a master.

The ADC module will be able to act as an asynchronous mode slave. Which the ESS ADC chip does very well (I have an eval board").

So I figure I really need the USB module to effectively test if the new ADC is working well.

Keep an eye on the USB thread I am going to be posting some news there soon.

Cheers!
Russ
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Old 6th March 2013, 09:21 AM   #80
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Excellent news!

If you need an extra pair of eyes checking the design (analog+PS section), email me.



Quote:
Originally Posted by Russ White View Post
Sure I can give you an update.

I have the design about 80% complete.

I have prioritized the USB module above this module partly becuase this module will very likely be used with the USB module quite a lot.

So I am designing the USB module so that it can connect to a DAC/ADC as a master.

The ADC module will be able to act as an asynchronous mode slave. Which the ESS ADC chip does very well (I have an eval board").

So I figure I really need the USB module to effectively test if the new ADC is working well.

Keep an eye on the USB thread I am going to be posting some news there soon.

Cheers!
Russ
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