Serial audio to USB audio input? - Page 1
Forum section: electronics / projects

author: JFK422
author_rank: Newbie
timestamp: October 29, 2017, 03:07:28 pm
content: Hello EveryoneSo, I'm trying to rework my audio setup and for that I planned to connect my (Capacitor) Mic together with a DSP and a DAC.I've selected already some IC for the DAC (AK4490EQ), ADC (AD7176-2) and DSP (ADAU1452) but now I dont know how to connect it with my PC. (Preferrably over USB)So does anyone know an IC/IC's which can bring serial audio to and/or from a PC in order for the DSP to take care of what goes where. Also it would be helpful to know if I did select the correct IC's so far.In the attachment, there is a small overview of my plan.Thanks in advanceJFK422

author: b_force
author_rank: Super Contributor
timestamp: October 30, 2017, 12:04:40 am
content: USB chips are difficult to get, mostly due to USB licenses (which are expensive!)Look for C-Media or XMOS.There are some boards available on ebay etc.

author: b_force
author_rank: Super Contributor
timestamp: October 30, 2017, 09:53:05 am
content: Quote from: blueskull on October 30, 2017, 02:44:23 amAre you sure about that?A couple of years ago I did a very similar quote for a professional solution and they responded with just $20000 to even use USB2.But maybe that was just for the driver part?

author: ebclr
author_rank: Super Contributor
timestamp: October 30, 2017, 10:08:50 am
content: You may discard the DSP, and to DSP on PC sidehttp://www.audiotec-fischer.de/lng/en/dsp-pc-tool/dsp-pc-tool-version-3/http://conexant.com/products/voice-audio/advanced-usb-codec/

author: RES
author_rank: Regular Contributor
timestamp: October 30, 2017, 02:27:37 pm
content: USB to SPDIF(Coaxial) (Use PCM2906B) Convertershttp://www.qlshifi.com/en/wzcapi/usb_to_spdif.htmhttp://www.ti.com/product/pcm2906b/descriptionSPDIF(Coaxial) to USB (Use PCM2707) Convertershttp://www.ti.com/lit/ds/symlink/pcm2707.pdfhttp://www.ti.com/product/pcm2707/description?keyMatch=pcm2707&tisearch=Search-ENAudio USB converterhttp://www.ti.com/audio-ic/converters/usb/products.html#

author: rob77
author_rank: Super Contributor
timestamp: October 30, 2017, 03:14:38 pm
content: Quote from: b_force on October 30, 2017, 09:53:05 amyou need the VID/PID if you want to distribute device drivers to your customers... if you build a one-off for yourself then you can use any VID/PID...i assume the $20k in your case was for the membership in the consortium and for assigning the VID/PID...

author: JFK422
author_rank: Newbie
timestamp: October 30, 2017, 08:15:11 pm
content: Quote from: b_force on October 30, 2017, 12:04:40 amSo ive done some more research and found the XHRA-2HPA from XMOS which is suitable for driving my DAC. And im able to get the chip from digikey. I also found the Tenor TE7022L. This chip can do both (hopefully) but there is nowhere a proper datasheet to be found. Because its only for bigger quantities. I found that i could get the chip from EBay. Also I found that there are I2C to usb bridges, but im uncertain, if these can be reprogrammed in order to work as a audio input/output.

author: JFK422
author_rank: Newbie
timestamp: October 30, 2017, 08:25:34 pm
content: Quote from: RES on October 30, 2017, 02:27:37 pmI will have a look into making the connection with spdif.

author: b_force
author_rank: Super Contributor
timestamp: October 30, 2017, 08:29:55 pm
content: Quote from: rob77 on October 30, 2017, 03:14:38 pmI think here is some more information:http://www.usb.org/developers/vendor/$4k a year, is quite a bit. I am actually a little confused about the $20k now.....