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Achieving Bit-Perfect USB Audio - Electronic Design
https://www.electronicdesign.com/technologies/embedded-revolution/article/21801786/achieving-bitperfect-usb-audio#:~:text=In%20synchronous%20mode%2C%20the%20audio%20clocks%20generated%20are,and%20I%202%20S%20block%20off%20of%20it.
USB Audio Simplified - Silicon Labs
https://www.silabs.com/documents/public/white-papers/usb-audio-simplified.pdf
One of the major issues with streaming audio over USB is the synchronization of data streams from the host (source) to the device (sink); this has been addressed by developing a robust synchronization scheme on “isochronous transfers,” which has been incorporated into the USB specification. The Audio
Clock Synchronization - Windows drivers | Microsoft Docs
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/clock-synchronization
In this way, the wave sink smoothes out jitter errors while staying roughly in sync. It also takes this time and converts it to a latency clock time that is relative to the master clock. This is important because the application might need to know where the synthesizer is rendering at any point. The latency clock tells the application the ...
Achieving Bit-Perfect USB Audio - Electronic Design
https://www.electronicdesign.com/technologies/embedded-revolution/article/21801786/achieving-bitperfect-usb-audio
Synchronization between data rates is maintained by use of a separate feedback path via the USB interface. Synchronous Endpoint Mode In synchronous mode, the audio clocks generated are synchronized...
USB Audio Bridge example with STM32F0 MCUs ...
https://www.st.com/resource/en/application_note/dm00189562-usb-audio-bridge-example-with-stm32f0-mcus-stmicroelectronics.pdf
It is mandatory to synchronize USB device and USB host clock domains. The USB specification determines three clock synchronization models - asynchronous, synchronous and adaptive. For more details of these models, refer to section 5.12: Special Considerations for Isochronous Transfersin the USB Specification 2.0 [4].
USB Audio 2.0 Drivers - Windows drivers | Microsoft Docs
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/usb-2-0-audio-drivers
The Clock Selector Control GET CUR request (ADC-2 5.2.5.2.1) must be implemented in compatible USB Audio 2.0 hardware. Feature unit For details on this specification, refer to ADC-2 5.2.5.7. The driver supports one single volume range only. If the Volume Control GET RANGE request returns more than one range, then subsequent ranges will be ignored.
Clocks & Sync - Vintage King Audio
https://vintageking.com/recording/computer-audio/converters/clocks-sync
Whether you are working on a small portable rig, or in a massive commercial studio, Vintage King has the perfect fit for you. From oven controlled, high precision synchronizers with crystal oscillators, to simpler designed USB and MIDI sync options. Contact your Vintage King sales rep to find the right clocking system for your setup.
USB Computer Clocks - Solutions for Time Synchronization
https://www.meinbergglobal.com/english/products/usb-clocks.htm
The DCF600USB is Meinberg's compact solution for synchronizing the clock of the PC that it is directly connected to. This DCF77 radio-controlled clock features an integrated ferrite antenna, and can also be operated using an external antenna in locations where reception is less favorable. MSF600USB MSF Radio Clock for the Universal Serial Bus (USB)
USB device audio streaming Expansion Package for …
https://www.st.com/resource/en/user_manual/um2195-usb-device-audio-streaming-expansion-package-for-stm32cube-stmicroelectronics.pdf
Figure 4. List of the descriptors used for X-CUBE-USB-AUDIO. 2.3 Synchronization. The main issue with USB audio applications is that different clock domains co-exist quite independently. The USB low-layer protocol does not provide any intrinsic clock synchronization mechanism, unlike other protocols like I. 2. S or SPDIF. Since clock domains
Time Synchronization Accuracy with PCI and USB …
https://kb.meinbergglobal.com/kb/time_sync/time_synchronization_accuracy_with_pci_and_usb_devices
Meinberg's approach to do this under Linux or *BSD is to let the kernel driver read both time stamps, plus the TSC count before and after this has been completed. The time synchronization software can then check how long it really took to read these time stamps. When it took longer than “usual” on a specific machine, there is a good chance that the program …
USB - The Well-Tempered Computer
https://www.thewelltemperedcomputer.com/KB/USB.html
Isochronous transfer can be done with three possible types of synchronization modes in the USB audio device. Synchronous, adaptive and asynchronous synchronization There must be some kind of synchronization between the PC and the DAC to avoid buffer under/overrun. Synchronous The clock driving the DAC is directly derived from the 1 kHz frame rate.
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