Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #100 on: November 13, 2018, 09:45:40 AM »
boards ordered ! let's make a 32 I/O interface


rkn80

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #101 on: November 13, 2018, 10:06:22 AM »
Thank you!
Boards shipped! Make a 32 I/O interface.  ;)

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #102 on: November 13, 2018, 10:14:01 AM »
I will. not a fan of digikey so if there's a mouser basket laying around...

rkn80

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #103 on: November 14, 2018, 03:27:36 AM »
Sorry, I don't have a mouser basket.

rkn80

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #104 on: November 26, 2018, 03:19:08 PM »
Great news for Win10-users:
Infinitas does work with Windows 10 almost out-of-the-box.
Steps I did:

1. Connect Infinitas with the computer. Windows should now enumerate the USB device and load the built-in usbaudio2 driver.
2. Installed asio4all. Infinitas should appear in the control panel.
3. Selected Infinitas in the asio4all control panel as input/output device.
4. Loaded Plogue Bidule and tada, there was 32in/32out duplex audio device.
5. Test: Made a physical loopback connection on the audio connectors and in Bidule send a sinus to the outputs and connected a wave viewer to any of the inputs. And well there I could see sinus coming in.

Raphael

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #105 on: November 26, 2018, 03:39:35 PM »
good job man !

dropix

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #106 on: November 27, 2018, 06:54:15 AM »

Hi

A question .....  can the interface work at 384hkz ?
Regards

Jose

rkn80

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #107 on: November 27, 2018, 08:02:08 AM »
A question .....  can the interface work at 384hkz ?

No, it cannot. Currently it works at 48kHz and the next software mod will be 96kHz.
But expansion boards with digital I/Os (SPDIF, AES3, ADAT) have currently higher priority.

pixael

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #108 on: December 18, 2018, 06:03:30 AM »
Hiya, are the ins and outs on the 8io balanced expansion board DC Coupled? I am interested in the infinitas for a mega eurorack project.

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #109 on: December 18, 2018, 07:57:49 AM »
i don't think you can, because of DC decoupling caps on outputs..


Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #110 on: December 18, 2018, 08:28:27 AM »
for the infinitas main board oscilator OSC101 : can i take one that's HCMOS output only, not HCMOS TTL ?

i'm talking about this one : https://www.mouser.fr/ProductDetail/IDT/XLH536024576000I?qs=sGAEpiMZZMt8zWNA7msRChwFtBbqVRMQooU%252boz4o2lm%2fBDggLNkYZA%3d%3d
which looks more stable than the one in the BOM : https://www.digikey.fr/products/fr?keywords=300-8253-1-ND


rkn80

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #111 on: December 20, 2018, 08:25:06 AM »
Hiya, are the ins and outs on the 8io balanced expansion board DC Coupled? I am interested in the infinitas for a mega eurorack project.

As dasnevestheo said, ther eare dc blocking caps, because the DAC (like many others) have a voltage offset on their output pins.
But excuse my stupid question, why should the AC coupling prevent it from use in eurorack? Well, actually I am not aware of the requirements of eurorack, let's have a look.

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #112 on: December 20, 2018, 08:27:40 AM »
DC coupled interfaces like Motu allows to send DC control voltage to controls eurorack synths (pitch, filters, etc)


rkn80

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #114 on: December 20, 2018, 08:30:25 AM »
for the infinitas main board oscilator OSC101 : can i take one that's HCMOS output only, not HCMOS TTL ?

i'm talking about this one : https://www.mouser.fr/ProductDetail/IDT/XLH536024576000I?qs=sGAEpiMZZMt8zWNA7msRChwFtBbqVRMQooU%252boz4o2lm%2fBDggLNkYZA%3d%3d
which looks more stable than the one in the BOM : https://www.digikey.fr/products/fr?keywords=300-8253-1-ND

Yes, should do the job. Make sure that you order the right package.


rkn80

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #115 on: December 20, 2018, 08:32:34 AM »
DC coupled interfaces like Motu allows to send DC control voltage to controls eurorack synths (pitch, filters, etc)

Ah, ok! Well, CV was not the idea of infinitas.  ;)

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #116 on: December 20, 2018, 08:41:15 AM »
Yes, should do the job. Make sure that you order the right package.

damn, the pinout is indeed not right... after that i'm done with the mouser BOM / baskets ;)

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #117 on: December 20, 2018, 08:51:24 AM »
can't seem to find an oscillator in that package that's bellow 50ppm... it's a shame cause a 20ppm oscillator could really improve the design ain't it ?

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #118 on: December 20, 2018, 09:10:43 AM »
anyway, here's my updated BOM for the infinitas main board.
Here's the mouser basket link : https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=93321cb3da

only things missing are XE216-512-TQ128 and 64 pin IDC socket... if anyone knows a mouser ref...

here's the DSP option basket : https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=cd5757c942

still working on the analog 8x I/O bom

rkn80

Re: [Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP
« Reply #119 on: December 20, 2018, 11:14:49 AM »
Wow, without having checked your mouser basket mouser seems to be much cheaper then digikey.


 

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