exaU2I - Multi-Channel Asynchronous USB to I2S Interface

[exa065]

Originally Posted by KOON3876

Hi exa065,
I'm trying your great exaU2I and my CUDA software FIR channel divider now. and I have some problem. (on my side)
If you could please help
My configuration:
(1) foobar 2000, to output Virtual Audio Cable "Line 1"
(2) My channel divider records from "Line 1" for L/R, 2ch.
(3) My channel divider playbacks to "Line 2" for L/R x 4 way = 8 channels.
(4) exaU2I Dashboard looks like reading 8 channels. but, please see attached, channel 3,4,5,6,7,8 shows same signal as channel 1,2.

This program was used for Emu ADAT (ASIO 8ch) before, it's OK. but now it outputs through VAC.
And you should tried 7.1 channel playback - VAC 8ch cable - exaU2I already.
So I think "How to use VAC" should be the problem.

I'm using PortAudio library, and it does not allow to use DS / ASIO at same time. So I have to use "Line 2" VAC from me to exaU2I.
thank you for great product! regards,

Hi KOON3876,

I've seen this problem with VAC. In my experience it happens when there is a discrepancy in the number of channels. For example if VAC is set to 8 channels and Windows Media Center is set to 6 channels.

My advise is to use ASIO and to avoid WDM if possible. You had this working with EMU ASIO. Why do you need to use WDM? Look at the Alocator Guide - Using Allocator with exaU2I and Foobar 2000. The VST Adapter Foobar plugin takes care of the transition from 2 channels to 8 channels.

[Bunpei]

Originally Posted by SunRa

A. Original Beethoven 352.8K / 24 bits file from 2L HD website - hiss

I confirmed that 2L (genuine) DXD files can be played without hiss noise on AK4399 DAC with I2S input of MCLK, 45.1584 MHz using Chiaki's SDTrans384.
I think SunRa's result with the low frequency MCLK means an "underclock" for driving 8 x OSF in the chip causes the hiss noise.

To exa065:
Why don't you provide MCLK options of 45.1584 MHz or 90.3168 MHz? A multiplier using a DPLL logic might be easily implemented in your FPGA.

[exa065]

Originally Posted by Bunpei

I confirmed that 2L (genuine) DXD files can be played without hiss noise on AK4399 DAC with I2S input of MCLK, 45.1584 MHz using Chiaki's SDTrans384.
I think SunRa's result with the low frequency MCLK means an "underclock" for driving 8 x OSF in the chip causes the hiss noise.

To exa065:
Why don't you provide MCLK options of 45.1584 MHz or 90.3168 MHz? A multiplier using a DPLL logic might be easily implemented in your FPGA.

Hi Bunpei,
Thank you for the suggestion. We will add this feature to the list of suggestions for exaU2I. I haven't heard from SunRa for a while. I wander what happened with his project.

[KOON3876]

I tried for a while for foobar - VAC - my CUDA FIR(PortAudio/DS) - VAC - exaU2I,
Then found PortAudio sample "DirectSound surround" itself does not work!
Now I'm re-building as VST plugin.

Does anyone know simple VST host, which can accept any audio player input / and outputs to 8 channel ASIO?

[qusp]

Hey mate while you are here, sorry for the little threadjack, any chance you will ever finish the native 64 bit mac version of allocator? hehe i'm about to buy a new mac mini to run my audio setup and crossover. i will end up buying allocator soon, i would prefer to use it natively rather than soiling it with windows, but i will is i have to.

[KOON3876]

Originally Posted by KOON3876

Does anyone know simple VST host, which can accept any audio player input / and outputs to 8 channel ASIO?

VSTHost: unstable, no response so many times.
CUBASE, Cantabile: I can't configure them
Reaper: I tried ReaFIR, and it's "waveout" works. I could make 2 way channel divider by Reaper.
Now I have pass-through VST effector, maybe I can implement CUDA FIR VST.. I hope.

foobar/etc -> VAC 1 -> Reaper (multiple FIR VST) -> VAC 2 -> exaU2I

exa065, by the way, Reaper / CUBASE etc can not find exaU2I ASIO driver.
Could you try them? (there are evaluation)

[ackcheng]

Hi Koon,

How about this console sound modular studio : Host for VST Plugins & DirectX(DX) | How to use | Buying | Useful Information

[qusp]

have you tried ableton or LIVE?

[exa065]

Originally Posted by KOON3876

VSTHost: unstable, no response so many times.
CUBASE, Cantabile: I can't configure them
Reaper: I tried ReaFIR, and it's "waveout" works. I could make 2 way channel divider by Reaper.
Now I have pass-through VST effector, maybe I can implement CUDA FIR VST.. I hope.

foobar/etc -> VAC 1 -> Reaper (multiple FIR VST) -> VAC 2 -> exaU2I

exa065, by the way, Reaper / CUBASE etc can not find exaU2I ASIO driver.
Could you try them? (there are evaluation)

Hi KOON3876,
In my experience this is the better VST host for Foobar: foo_vst: VST 2.4 adapter - Hydrogenaudio Forums.
I've used it to integrate Allocator: Using Allocator with exaU2I and Foobar 2000.

Please use the 32 bit version or Reaper - the exaU2I ASIO driver is 32bit. You can also use ReaRoute: ReaRoute - CockosWiki. It is available as an option in the Reaper setup.

exa065

[KOON3876]

Thank you,
Console: looks like stopped at 2008.
ableton: expensive..
foo_vst: oh, it can not contain multiple instance of same VST.
Reaper 32bit: Thanks I can see exaU2I ASIO DB. but I can not select any input, when exaU2I driver is selected.
maybe I should keep current player-VAC-Reaper-VAC-exaU2I configuration.

Attached "pass-through" VST source code. (I will add filter function here)