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You repeatedly call sourceBuffer.appendBuffer(data) to push chunks of (in our case, pre-decrypted) encoded audio data to the browser.。关于这个话题，im钱包官方下载提供了深入分析
，详情可参考旺商聊官方下载
// drop-oldest: Discard old data to make room，这一点在heLLoword翻译官方下载中也有详细论述
Role: Google Senior Staff Engineer