Search found 275 matches

by larry
Wed Jun 27, 2018 1:17 pm
Forum: Q&A
Topic: Round-trip latency of USB Audio is not stable
Replies: 14
Views: 54668

Re: Round-trip latency of USB Audio is not stable

Variability across start and stop occurs in the input path, ie device to host. When streaming stops, buffer of the input path (called aud_to_host_fifo in the code) overflows. There is a mechanism in there to reset the buffer to half full and stay like that until streaming resumes. It does that on by...
by larry
Wed Jun 20, 2018 1:37 pm
Forum: Getting started
Topic: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra
Replies: 17
Views: 18156

Re: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra

It was just an idea to test if there is something about the device's descriptor that macOS doesn't like
by larry
Tue Jun 05, 2018 5:34 pm
Forum: Getting started
Topic: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra
Replies: 17
Views: 18156

Re: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra

The process is to run the xConfigurator script to generate a binary. This needs to be programmed in the SPI flash of your xCORE-AUDIO board.
by larry
Fri May 25, 2018 3:08 pm
Forum: Getting started
Topic: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra
Replies: 17
Views: 18156

Re: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra

Resolution is set to 32bit in the xCORE-AUDIO's internal firmware.

What I meant was reducing the device to 48kHz using SAMPLE_RATE_BITMAP of the .cfg file. Then check if macOS still fails to offer a 32bit option.
by larry
Fri Apr 20, 2018 4:38 pm
Forum: Getting started
Topic: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra
Replies: 17
Views: 18156

Re: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra

Did you have access to documentation? I think it's a plain text file distributed alongside xConfigurator.
by larry
Mon Apr 16, 2018 1:28 pm
Forum: Getting started
Topic: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra
Replies: 17
Views: 18156

Re: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra

Do you have access to xConfigurator, the configuration utility for your xCORE-AUDIO board? It's on the xCORE-AUDIO page on XMOS.com under xCORE-AUDIO configuration utility.
by larry
Tue Apr 10, 2018 1:30 pm
Forum: Getting started
Topic: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra
Replies: 17
Views: 18156

Re: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra

Sorry, I meant restricting sample rate using the HRA configuration. Do you have access to that?
by larry
Mon Apr 09, 2018 5:15 pm
Forum: Getting started
Topic: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra
Replies: 17
Views: 18156

Re: xcore-audio hi-res 2 : 32bits on a Macbook with macOS High Sierra

There must be something about that descriptor that macOS High Sierra doesn't like. I have an XMOS device with a similar configuration (16/24/32bit) that enumerates fine and allows selecting 32bit in Audio MIDI Setup. If you restrict the device to 48kHz by setting MAX_FREQ to 48000 does Audio MIDI Se...
by larry
Fri Apr 06, 2018 1:01 pm
Forum: Development Tools and Programming
Topic: How to resolve a CDTDebugModelPresentation.12=signal
Replies: 7
Views: 5092

Re: How to resolve a CDTDebugModelPresentation.12=signal

The CDTDebugModelPresentation message, I guess. It looks like the double clicking happens later and might be a consequence of the CDTDebugModelPresentation message.
by larry
Fri Apr 06, 2018 12:51 pm
Forum: Development Tools and Programming
Topic: How to resolve a CDTDebugModelPresentation.12=signal
Replies: 7
Views: 5092

Re: How to resolve a CDTDebugModelPresentation.12=signal

I ask to establish if this could be an xgdb issue or an xTIMEcomposer (Eclipse) issue