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Gieseler Audio

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Gieseler Audio last won the day on August 31 2017

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  1. Digikey have finally listed the AK4499EQ https://www.digikey.com.au/products/en?keywords=Ak4499 $129 Ouch! ETA 5th of September
  2. Hi Lodovico, Audio GD build there own version of the Amanero board & the pads you have to short to erase the firmware are in a different location to the Amanero instructions. The correct info is here http://www.audio-gd.com/Pro/dac/Amanero/AmaneroEN.htm Good luck - Cheers Clay
  3. Yes the NDK NZ2520SD’s have the enable pin but like you mentioned are extremely small & difficult to work with. The connection pads on the bottom are recessed from the edge so the only way to solder it on a board is with solder paste & a heat gun -carefully!
  4. Yes unfortunately other wise I would be upgrading the Amanero clocks to the Crystek CCHD 575 clocks. In the Genuine Amanero board the two clocks are permanently connected to the 3.3v rail & then the CPLD chip sends an enable signal to whichever clock is required. This type of clock uses “try-state” logic so if it connected to power but the enable pin is low the output is high impedance. It is a very handy feature in a dual clock setup as you can just parallel the clock outputs & just enable the one you want. The CCHD 575 does not have this feature - just Vdd, Ground & output - dam shame.
  5. Yes the CCHD 575 clocks look very good but they don’t have a standby/enable pin like the original Amanero clocks so they are not a drop in replacement.
  6. Hey thanks for the detailed reply Gordon. The Amanero clone looks really nice. I’ve been playing around with clocks lately and those Crystek units perform really well. I’m even thinking again of making a USB to I2S board based on the Xmos chip. I been doing some tests with isolators, reclocking, clock buffers etc & feel pretty comfortable with it all now. Unfortunately it would cost a bit more than the Amanero clone. I’m sure if you moved away from S/PDIF to I2S you would get a noticeable audio improvement. The Singxer F1 actually uses a dc to dc converter to run the back end (eg the S/PDIF chip) so not the best. Anyway I think that the DSC1/2 is an excellent design especially coupled with the AK4137 like you have. Well done!
  7. Hi Gordon, well what was the final outcome? Did the replacement Amanero get the PC input side of things working & how did it sound vs the CD transport input? I’ve actually ordered some of the Chinese 10k/10k transformers so it will be interesting to see how they compare sound wise to the Jensen’s I use.
  8. Hi Matt, I have been following that thread with great interest. The evaluation board looks massive! - I have a feeling it is probably $1000+ AKM referred me to Arrow Electronics for the evaluation board but it doesn’t seem to be showing up there yet so I don’t know where Markw4 got his. Anyway I finally got my own evaluation board yesterday and and I’m just waiting for a few more parts to finish it off. It is a very basic evaluation board that I designed mainly to get an initial operation up and running and test out control codes. It was a bit of a challenge soldering the 128-pin HTQFN package - super fine pin pitch. Anyway I should have it finished next week so it will be very interesting with the first testing process.
  9. Yes Orange Squeeze https://play.google.com/store/apps/details?id=com.orangebikelabs.orangesqueeze&hl=en_AU
  10. RE high low gain setting on the Fein II I just been listening carefully to a few different tracks & I think the "high gain" setting actually sounds a bit better. It's hard doing a accurate compare because the volume level changes but the high gain setting seems a little fuller, slightly less sibilant & smoother. Anyway I just thought it would mention it & it might be worth doing a comparison yourself & see what you think. Technically I'm struggling to work out why there would be a difference but maybe the higher gain setting is changing a few parameters around the internal op-amps which possibly results in a better match with the output transformers.
  11. For Android users Orange squeeze is pretty good too. https://play.google.com/store/apps/details?id=com.orangebikelabs.orangesqueeze&hl=en_AU
  12. Hi - yes I did try it a while back with a Raspberry Pi setup - I did not like the very basic web base remote vs the iPeng app which is very feature rich with lots more options. From memory the sound was fine.
  13. You probably need to update it to ver 2.3 or 2.4. Fairly involved though and Linux skills required. more info https://www.vortexbox.org/forum/support/38-latest-version
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