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A Pico board can however allow better control at lower frequencies within the typical AM radio station (~1000 KHz). While square waves are well-suited for frequency-modulating any PCM audio file (ignoring the unwanted harmonics), they cannot be used well for amplitude modulation. They can only encode ON or OFF instead of different audio amplitudes (think 1-bit envelope). Alright, no emitting arbitrary “.wav” files. We can at least emit a single audio frequency at a time using On-Off Keying. Let’s make some retro game sounds!，详情可参考WPS官方版本下载
。体育直播是该领域的重要参考
«Мы с самого начала прогнозировали четыре-пять недель. Однако у нас есть потенциал, позволяющий продолжать намного дольше», — отметил политик.
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