No measurements done as the physical board not out yet. design follows closely ESS recommended guidelines and eval board layout with improved implementation. So expecting performance accordingly - see post #106. Maybe someday send the finished product to ASR🙂
No need for all the ASR nonsense, unless you want to use it as advertisement for your product 🙂 I just need some measurement to verify that your design reaches the performances specified in the datasheet of ES9039 pro.
Sorry, I don’t have the measuring instruments like the APx machines and no plans to get them also. So the reason why I was thinking of sending elsewhere.
APx machines are insanely expensive. In another thread, borhok2610 was mentioning an Cosmos APU plus AK5394 ADC setup. Such a setup should be affordable and handy for measuring DACs...
(and indeed, not to micro manage the last tenth of a dB of THD, but to sanity check everything)
(and indeed, not to micro manage the last tenth of a dB of THD, but to sanity check everything)
Perhaps someone can volunteer to do this measurement stuff? Happy to send the finished hardware over. I am not familiar with this Cosmo APU and do not wish to get one - already full house with all sorts of other equipment.
As far I am concerned when the design follows the recommended guidelines the desired performance will be achieved. I have got all the design files of the ESS eval board and this board uses the the same type of components for the DAC chip and output stages ICs that are the crucial ones. Schematic and layout of the core sections according to the Eval boards. It will work fine and sound checks to confirm only at this stage..,
As far I am concerned when the design follows the recommended guidelines the desired performance will be achieved. I have got all the design files of the ESS eval board and this board uses the the same type of components for the DAC chip and output stages ICs that are the crucial ones. Schematic and layout of the core sections according to the Eval boards. It will work fine and sound checks to confirm only at this stage..,
Forgot to mention my test gear audio chain:
Surface Pro4 core i3 -> HqPlayer5/Roon -> DAC -> Amp: Benchmark AHB2 -> Speakers: Pearl Acoustics Sibelius
Pretty resolving and can pick up issues quickly. I have got the AKM DAC also for comparison.
And then once this is good, we can possibly look into measurements, etc
Surface Pro4 core i3 -> HqPlayer5/Roon -> DAC -> Amp: Benchmark AHB2 -> Speakers: Pearl Acoustics Sibelius
Pretty resolving and can pick up issues quickly. I have got the AKM DAC also for comparison.
And then once this is good, we can possibly look into measurements, etc
Not all, others do things differently. Some simplify to meet price point or do things cheaply… interesting to see how other do it?
Aiming for the best possible outcome here, have look at how things are progressing 🙂
Aiming for the best possible outcome here, have look at how things are progressing 🙂
Last edited:
All 8* or 16 channels of them 🙂 Bravo, acko!
* This while I thought it is already hard enough to have just 2 channels performing well.
* This while I thought it is already hard enough to have just 2 channels performing well.
Last edited:
Possible to listen up to 32 channels for this design in L/R pairs to test functioning and the same way if measurements are done later
Agree, but wait for hardware to come out first and for those who want measurements also then delay purchasing until ASR or someone else test it.
Not that hard, for multi channel designs you just need to get one channel optimised and then copy paste all the rest for identical prints on board. And then at module level similar for even more channels. Of course there is still a lot of complexity to connect up. So, step by step. I made a video of the process to impress my gfs 🥰
Way out of my comfort zone. Multichannel is true horror to me. All existing difficulties, error possibilities, design imperfections, on chip peculiarities like humps or simply mediocre sound, opamps, connectors and amplifiers (with again all the previous items) and the necessary power supplies (with again all the previous items) multiplied by the number of channels. Then the countless features, configurations etc. etc. combined with either pc's or laptops and screens. The demonstrations I experienced were more a computer venue with loud movie sequences and explosions than that it had anything to do with just playing an album in peace and quietness.
The thought of needing to have 8 let alone 16 loudspeakers and the cabling or God forbid wireless channels would make me have no audio at all.
If it attracts the girlfriends (I did notice the "s") then of course all is good 😀
The thought of needing to have 8 let alone 16 loudspeakers and the cabling or God forbid wireless channels would make me have no audio at all.
If it attracts the girlfriends (I did notice the "s") then of course all is good 😀
Last edited: