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I think I remember that the early version was using the DAC0/1 i2s wire and not a separated one as now ... I ll check with Pavel but I m afraid that's the point. There is always a possibility to reroute the AK4118 input so it goes on the new i2s line (the one used for DSD7 in fact) but that...

Hi From a request of @montyliam, here is an example for 6 channel bass management which gives possibility to offload this from JRiver as an example. Playing with delays on each channels gives the possibility to better align phase shift between SUB and other speaker to minimize excess or...

Hi Guys quick review of the V1.6 and V1.61 source code show that the knob volume is always applied on the AES output for DAC8PRO with or without DSP extension. we have planned for a possible exception for future version but this option is not yet implemented in the front panel menu. please...

Thank you Makimov for your kind words , your satisfaction is ou best rewards :)

Hi Rockerz, as an audiophile you did the right choice with DAC8STEREO. now if you see "no file exists" it means that the dac8stereo utility is not visible in the folder that your Terminal window is showing. From this first feedback I understand that you are not familiar with the operating...

Hi Rockerz, the upgrade process via USB connection to the host computer relies on a standard and quite robust protocol called DFU (even used by Apple on the iPhone...). the DAC8 products delivered with firmware v1.50 or above are fully compliant with the DFU upgrade utility provided by Okto...

Hi Sumitc, thanks for your interest on this. first , it depends if you want to upsample a stereo stream to 192k and then go with up to 8 channels dsp treatment at 192k (which reduce treatment capacity then), or if you do all dsp say at 96k and then upsample each channels just before putting the...

now some of you will notice that the High Shelf filter for the treble driver will generate an excess gain of potentially 4db. Also if you listen some music program with special recordings (like a highly distorted signal looking like a square wave...) the linkwitz rilley filters may also bring...

Hi in the dedicated section I have put an example which might help some of you to evaluate the complexity. https://www.audiosciencereview.com/forum/index.php?threads/okto-dac8-update-with-dsp.54196/page-2#post-2058987 hope this helps

Hi There some of you are questioning how to use the DSP capabilities in the DAC8PRO. Reading the whole documentation might be cumbersome. here is the approach in a nutshell. A program must be created on a host computer with a text editor. no friendly graphical user interface! Then it is...

Hi Neddy good to hear you made it :) now with 1.60 every upgrade will be straight forward. Regarding 8 channels indicator in v1.60 the 8 numbers are always surrounded by a square and they become white on black when a sound presence is detected on any of the 8 channels. On the DSP version...

Hi There finally, using latest libusb 1.0.27 and compiling for arm architecture and tuning a little bit timing after reboot comes to a success. Okto Research is now having the Mac OS updater for final end-user tests, for x86 (up to Ventura) and arm64 for Sonoma machines. Based on this finding...

Hi goryu, on macOS we have problem with Sonoma, probably due to the new security settings related to accessories connection, because the process needs 3 reboot of the usb device and their is obviously a conflict with standard libusb library and Sonoma new behavior. so far I can't solve this...

Hi Guys, the DAC8PRODSP7 freeware firmware upgrade for DAC8PRO is now available in a mature version v1.61 it is based 100% on the v1.60 and brings all the DSP capabilities already discussed and a new feature to spread volume across DSP and DAC giving unique possibility to minimize side effect of...

Hi, you are right that XMOS provide libraries to handle spdif input. But nobody use them because the XMOS USB demo application is not made to route the SPDIF RX flow to the I2S DAC output... only to USB Host. And then if you want to do it, you enter in tons of problems because again in this demo...

Hi, sorry maybe due to a typo in the name. Lipshitz. This is becoming bit off-topic sorry. Basically the low pass goes trough a Bessel 6 or 8 (for exemple) providing a very flat delay response and then the high pass is created by delaying the signal and just subtracting the lowpass. see in...

Hi ! the dac8pro as 250mips available and even 460 if used in stereo (only 1 AES at a time). This gives 2400 instruction per sample at 192k or 4800 at 96k. For a generic channel treatment doing input, gain , N biquad, delay, output, the total number of instruction required is roughly 64+Nx19 so...

hi, looking forward to convince you on a real case study ! the PureDSP process with dynamic coefficient depending on sample rate is unbeatable.

it is true that delivering DSD256 over 8 channels via USB 2.0 is a concern for all solution based on XMOS as the provided USB device library is limited to handling 1 PID where USB 2.0 can support up to 3. Therefore the max bandwidth is 64MBytes/sec for outputs, which is not enough as DSD256...

Hello, may I ask some guidance, I m using Volumio 3 on rpi4 with a dac8pro. I have installed camilladsp and its gui, thanks to mdsimon2 for this great tuto. (Im not using the FusionDSP plugin) this works perfectly on the command line with a sequence like aplay -v -D camilladsp song.wav the...