[Infinitas]: USB Audio Class 2 Interface, 32 in, 32 out, DSP

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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
 
dropix said:
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.
 
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.
 
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

 
pixael said:
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.
 
DC coupled interfaces like Motu allows to send DC control voltage to controls eurorack synths (pitch, filters, etc)
 
but this does a far better job : https://www.tindie.com/products/hotchk155/cvocd-a-super-flexible-midi-to-cv-box/

 
dasnevestheo said:
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.

 
dasnevestheo said:
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.  ;)
 
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 ?
 
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
 

Attachments

  • Infinitas BOM (digikey and mouser) rename to xlsx.pdf
    16.2 KB · Views: 5
Wow, without having checked your mouser basket mouser seems to be much cheaper then digikey.
 
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