![]() ![]() Microsoft Windows automatically resamples the 44.1KHz audio found on CDs to 48KHz. 44.1KHz requires the card to handle different amounts of data each frame requiring more advanced buffering and synchronization techniques and more processing power. The sample rates that were implemented are all a multiple of the 1ms USB frame meaning each frame sends the same amount of data. 44.1KHz was not implemented due to the difficultly and additional processing overhead. The quality approaches commercial grade as the sample rate is higher then CDs. The sound card runs at a sample rate of 48KHz, 32KHz or 24KHz selectable by the OS with 12 bits per sample. After testing the card for awhile, I decided it's better to not require drivers for the card especially since the HID/WinUSB interface is rarely used. In a previous version, WinHTTP was oringally used. The purpose of the custom interface is for programming the device serial number, upgrading the firmware, and in the future any other configuration that isn’t supported directly by USB Audio 1.0. The first device is an implementation of the USB Audio 1.0 interface and the other device is a custom interface based on a HID interface. Modifikace spoÄÃvá pÅ™edevÅ¡Ãm v podpoÅ™e pÅ™eruÅ¡enà oproti tradiÄnÃmu pollingu. VÅ¡e je postaveno okolo produktů od Microchipu. ![]() Tato idea vznikla na jednom fóru vÄ›novanému PICům. Ġ5.07.23 07:46 - PicoPad - open source hernà konzole s R. ġ7.10.23 10:06 - Ordering a Cheap PCB + Assembly in China. ![]()
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