Koifarm
Member
Maybe I mixed some things up.
-
Welcome to ASR. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!
York DSP devices
- Thread starter eclipsevl
- Start date
- Thread Starter
- #22
This is what I was able to achieve with ES9822:
I made a test board module for ES9822
But this is mostly for measurements purpose, I use Cosmos ADC but really wanted integrated solution: S/PDIF in/out + DAC + ADC. So I assemble such device as prototype:
1. ADC ES9822
2. DAC ES9039 (From Ali, same as @Koifarm uses)
3. The DSP board below with York interfaces as 2 channel in + 2 channel out
- Thread Starter
- #23
I guess, one reason for that there are many different things that I am trying to put together into some organized product line.
But so far it is just many construction pieces of software and hardware
Koifarm
Member
Also your ADC is very good, I think Cosmos use only one opa1612 at every input channel. Your input is a little different or not?
- Thread Starter
- #25
Yes. One of the issues with Cosmos ADC - it has quite low input impedance.
So in this one the first stage is OPA1612 as buffers to provide higher input impedance, and then - diff amp OPA1632/1633 as the filter.
Koifarm
Member
Still better then Minidsp and balanced input.
Envy the DIY skillz.
I wish inexpensive finished OTS products based on that were available in 6 or 8 channels.
But as I stated, within that category, 3x PocketADC is hard to beat.
Mark185
Active Member
- Joined
- Jan 30, 2025
- Messages
- 155
- Likes
- 145
What eclipsevl is doing is on another level entirely from the PocketADC and of great interest to a fairly wide following. He also posts this on diyAudio and I follow his work with great admiration. I already have his York USB interface and just purchased the DSP board to begin experimenting with active speaker design using FIR filters which the lesser Analog Devices chips can't do. I find the only way to truly learn how to use products like this are to jump in and start doing and make mistakes. It is how I finally got comfortable with Sigma Studio. I started with ADAU1701 DSP boards and am stepping up to the ADAU1466 to tackle more advanced designs. I honestly do not think it is possible to make and sell an all-in-one device like you seem to want at the prices eclipsevl charges. If you want inexpensive finished OTS product, look at the Down4Sound EZDSP68+. It has decent noise and distortion specs and the PC configuration software can handle active crossovers and parametric EQ. I own one and at $269, it is hard to beat.
Last edited:
- Thread Starter
- #29
A new version of 2x4 DSP is sent to production.
Updates:
1. The USB is now included in the on-board MCU, no need for external interfaces. Also, it now has 2 channel USB audio input.
2. S/PDIF in and out moved to separate connector
Also progress on the 4 channel DSP amp:
It is designed to be used as a plate amp, it has aluminum base plate as heat spreader. Ant there is a separate interface board with connectors, volume pot and ADC for analog input:
I am thinking to create a separate topic for the amp a bit later. Still couple of things to do in firmware to enable flexible configuration of master volume controls and led functions
Updates:
1. The USB is now included in the on-board MCU, no need for external interfaces. Also, it now has 2 channel USB audio input.
2. S/PDIF in and out moved to separate connector
Also progress on the 4 channel DSP amp:
It is designed to be used as a plate amp, it has aluminum base plate as heat spreader. Ant there is a separate interface board with connectors, volume pot and ADC for analog input:
I am thinking to create a separate topic for the amp a bit later. Still couple of things to do in firmware to enable flexible configuration of master volume controls and led functions
- Thread Starter
- #31
It is this module then, it has 2 analog inputs, 4 analog outputs.
Attachments
- Thread Starter
- #32
2x2 DSP for FFA or Pascal amplifiers:
ADC is PCM1809, DAC - PCM5242
I am considering making 2x4 DSP on ADAU1701 too, it would allow to make cheaper 2x4 version. Less DSP, no USB and S/PDIF but still enough for PEQ, Xover and limiter.
On the 12 pin connector (left) there is USB port for DSP configuration, 2 GPIO pins, 2 AUX ADC for potentiometers, I2C (just in case)
ADC is PCM1809, DAC - PCM5242
I am considering making 2x4 DSP on ADAU1701 too, it would allow to make cheaper 2x4 version. Less DSP, no USB and S/PDIF but still enough for PEQ, Xover and limiter.
On the 12 pin connector (left) there is USB port for DSP configuration, 2 GPIO pins, 2 AUX ADC for potentiometers, I2C (just in case)
Last edited:
- Thread Starter
- #33
And yesterday I received new HW for 2x4 version:
Summary:
2xBalanced inputs
4xBalanced outputs
S/PDIF input
S/PDIF output
USB (DSP configuration with YorkStudio SW GUI and 2 channel UAC2 audio)
2x AUX ADC inputs for potentiometers
2x GPIO - configurable (encoder/IR control, LEDs)
I2C routed to 12 pin connector, available for extensions or programming DSP with custom program from sigmastudio.
Power supply 7-36V
I am going on vacation for several weeks so will continue work on these in august. Need some firmware updates and updates to the GUI software.
Summary:
2xBalanced inputs
4xBalanced outputs
S/PDIF input
S/PDIF output
USB (DSP configuration with YorkStudio SW GUI and 2 channel UAC2 audio)
2x AUX ADC inputs for potentiometers
2x GPIO - configurable (encoder/IR control, LEDs)
I2C routed to 12 pin connector, available for extensions or programming DSP with custom program from sigmastudio.
Power supply 7-36V
I am going on vacation for several weeks so will continue work on these in august. Need some firmware updates and updates to the GUI software.
