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#1 |
diyAudio Member
Join Date: Mar 2010
Location: Lake Macquarie, East Coast Australia
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I have already built a standard BIII using the IVY as the output stage & control it all with an Arduino Mega, I'll call my approach passive control as I did not remove the BIII firmware chip. When I setout on that journey I was not aware of HifiDUINO and the fact that the BIII could be controlled directly from the Arduino via the removal of the BIII firmware chip, that I could never have worked out for myself. As I had already set my goals and was well into the project I decided to see my approach to it's final conclusion, which I'm glad to say I have done and it's all working very satisfactory. I have had lots of help on the way & I thank all of those people very much. I have included a photo of the original which is still in it's prototype cloths.
I have always wanted to try tubes/valves and after much reading finally decided the preamp DAC stage was probably the way to go, at least for me that is. I had originally intended on removing the IVY from the original build and installing the Tube-I-Zator in it's place, but after coming across the HiFiDUINO blog and after much hand wringing and bank account fretting the DIY bug go the best of me again, so I decided to build a completely separate DAC = DQ DAC 2 I have gathered all (or most) of the components & as soon as my speakers are completely finished I will get this project into full swing. One of the really scary parts of the project is the code required to make the whole thing work, if it wasn't for a very helpful community I would never be able to do it on my own as I am code challenged. I had a lot of help from my ex (yes my ex wife who was a programmer in a past life) on the original build as well as other DIYers. So this build will consist of:
![]() The remote will control the:
I'm looking at using Potato Flip Flops so I can re-clock the Amanero with the BIII clock, of course I'll be standing on the shoulders of giants to make that happen. As I have purchased parts of the build at different stages with different outcomes in mind I do have at least one issue I haven't worked out yet. When I had the transformer made for the Tube-I-Zator I had an extra 5v secondary put in, now I wish I had made it a 12v secondary. As it stands I figure I'll probably be able to run the Mega from the 5v secondary but I will not be able to run the 12v triggers from it which means I need another PSU, which I was hoping not to have. Last edited by DQ828; 10th January 2013 at 11:17 AM. |
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#2 |
diyAudio Member
Join Date: Feb 2009
Location: Qld
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Just had a quick skim of your plans, looks fun!
Being a touch pedantic and I know you haven't had a chance to think it through yet, but, I think you'll need to re-think the reclocking scheme, you won't be using the fixed speed clock from the BIII for the reclocking. Maybe I'm mistaken though? qusp/bigpandhak/glt will be along and correct me I am sure ![]() Acko might be able to help you with a new board he's working on that could get you a neat solution with the Amanero though ![]() |
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#3 | |
diyAudio Member
Join Date: Mar 2010
Location: Lake Macquarie, East Coast Australia
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Quote:
![]() Hmm $150, my budget is already blown & I dont have a case yet. Last edited by DQ828; 10th January 2013 at 11:51 AM. |
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#4 |
diyAudio Member
Join Date: Feb 2009
Location: Qld
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#5 |
diyAudio Member
Join Date: Oct 2009
Location: Brisbane, Australia
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yes, unless you are actually using the amanero clock for clocking the BIIISE the reclocking mod is totally superfluous. the BIIISE already uses its onboard clock to not only control the dac, I believe it has some flipflops that reclock the incoming bck/lrck/sdata now. you can see them directly after the i2s inputs IC5.ICx, ICx on D2, D1, DCK.
the amanero reclocking mod is only of any benefit if you plan to use the ESS in Synchronous mode, at which point I would suggest you get a fifo reclocker ![]() otherwise have fun!! the acko lower budget version should still allow the reclocking cleanly at the speeds supported, perhaps we could suggest an optional 4 x multiplication of the clock on his board, which could add very minimal jitter. |
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#6 | |
diyAudio Member
Join Date: Oct 2004
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Quote:
There is still benefit in reclocking the Amanero output with the Amanero clocks into a asynchronously operated Sabre32 but you are limited to 192K. You could also take the output clock from the clock on-board the BIII and use that clock to reclock the output of the amanero board. This will not limit the SR to 192K since this clock is 100 MHz.
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www.hifiduino.wordpress.com |
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#7 |
diyAudio Member
Join Date: Mar 2010
Location: Lake Macquarie, East Coast Australia
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I will get the whole thing up & running before I do the reclocking, I imagine that will be some time away.
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#8 |
diyAudio Member
Join Date: Jul 2005
Location: North IL
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#9 | |
diyAudio Member
Join Date: Oct 2009
Location: Brisbane, Australia
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Quote:
oh hang on, you are suggesting to do exactly what I thought was already happening? Last edited by qusp; 12th January 2013 at 04:14 AM. |
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#10 | |
diyAudio Member
Join Date: Oct 2009
Location: Brisbane, Australia
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Quote:
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