Just found this: AK4490EQ Filter adjustment - Gieseler Audio - StereoNET
I'm agreed with that:
"I was expecting "Minimum delay Sharp Roll-off" (Minimum Phase on the M-DAC) to sound the best, but instead it was second worst - quite glary and aggressive sounding, although very sharp and detailed. I suspect this is due to the very severe post-ringing of this filter type (far worse than even a brickwall filter)."
I'm agreed with that:
"I was expecting "Minimum delay Sharp Roll-off" (Minimum Phase on the M-DAC) to sound the best, but instead it was second worst - quite glary and aggressive sounding, although very sharp and detailed. I suspect this is due to the very severe post-ringing of this filter type (far worse than even a brickwall filter)."
Hi DimDim,
just a question, because of I began with the controller setup (Arduino nano).
I've studied your code "AK4490_STM32F-v1.35" and do not understand one thing:
the chip adress code (e.g. 0x13) must followed by an eight, R/W bit. That is not the case in your code (e.g. by the "ReadRegister", "WriteRegister" objects). Does it functioning indeed, or I am wrong?
just a question, because of I began with the controller setup (Arduino nano).
I've studied your code "AK4490_STM32F-v1.35" and do not understand one thing:
the chip adress code (e.g. 0x13) must followed by an eight, R/W bit. That is not the case in your code (e.g. by the "ReadRegister", "WriteRegister" objects). Does it functioning indeed, or I am wrong?
You're right, but that is just the way the Arduino I2C library works. The address must be given with only 7 bits (the 8th is added by the compiler).
Thanks, I'll try it.
The DAC SDA/SCL ports should be connected (through a level shifter) with Arduino pins A4/A5 (SDA/SCL) just like the OLED or with RX0/TX1?
The DAC SDA/SCL ports should be connected (through a level shifter) with Arduino pins A4/A5 (SDA/SCL) just like the OLED or with RX0/TX1?
The DAC's SDA/SCL pins should be connected to the Arduino's SDA/SCL pins (A4, A5 in the case of the UNO) through a level shifter. If your UNO is Rev3 you should use the SDA/SCL pins that are near the RESET button.
There’s more out there on that same site, from the provider of the Klein dac, decoupling hints and such...
Hi, I have PCBs for you if you wish, but without IC. The DAC can be ordered from DigiKey only, they have a free delivery from 50€ (below that 18€ shipping!!) I think.... So you should order with other components together, so makes it sense...
(aber kannst gerne auch mal privat schreiben!)
(aber kannst gerne auch mal privat schreiben!)
Does somebody have any experience what could be the difference with internal 1.8V LDO enabled / with external regulator?
Hi All, I have a question about the AK4458. Are the stated noise and distortion specifications in the datasheet attainable without their suggested external output circuit? I would like to make a differential output design using OPA1632's or LME49724's. Can I simply apply my own differential MFB filter?
How much current does this draw?
I'd like to use this in a car and want to make sure I buy a 12v to +15/-15vdc PSU with enough current. Thanks
I'd like to use this in a car and want to make sure I buy a 12v to +15/-15vdc PSU with enough current. Thanks
Please see the AK4458 datasheet! But it is depending on the PSU (used voltage regulators) too...!
You do not need +/- 15V, +/- 12V (or less) is high enough for the filter opas.
You do not need +/- 15V, +/- 12V (or less) is high enough for the filter opas.
